Trek

Trek is one of the world's most iconic bicycle brands — an American manufacturer founded in Waterloo, Wisconsin in 1976, producing road, mountain, hybrid, and e-bikes for cyclists at every level from beginner to professional. Trek bikes are ridden by Tour de France winners, World Cup mountain bike racers, and...

Trek is one of the world's most iconic bicycle brands — an American manufacturer founded in Waterloo, Wisconsin in 1976, producing road, mountain, hybrid, and e-bikes for cyclists at every level from beginner to professional. Trek bikes are ridden by Tour de France winners, World Cup mountain bike racers, and millions of everyday cyclists worldwide, with a product range that spans entry-level trail bikes to flagship carbon race machines. At Swinnerton Cycles, we stock Trek bikes, frame parts, and accessories for cyclists looking for one of the world's most trusted and recognised bicycle brands.

Our Trek range includes the Marlin 4 Gen 3 mountain bike — Trek's entry-level hardtail MTB designed for trail riding with a durable, adaptive frame — alongside genuine Trek frame parts and accessories including full suspension rocker pivot bolts and water bottle nutsert plugs for maintaining and repairing Trek bikes.

Why Choose Trek?

  • American bicycle brand founded in Waterloo, Wisconsin in 1976
  • Ridden by Tour de France winners and World Cup mountain bike racers worldwide
  • Marlin 4 Gen 3 entry-level hardtail MTB with durable, adaptive frame for trail riding
  • Genuine Trek frame parts including M10x1mm full suspension rocker pivot bolts
  • Water bottle nutsert plug M4 x 13mm for secure bottle cage mounting on Trek frames
  • One of the world's most trusted and recognised bicycle brands across all disciplines

Top Selling Trek Products

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  • Trek Bosch G4 Speed Sensor with M4x14 fastener for Bosch E-bike systems, accessory component for bike speed detectionTrek Bosch G4 Speed Sensor with M4x14 fastener for Bosch e-bike systems, accessory for accurate speed detection.

      Trek Bosch G4 Speed Sensor with M4x14 Fastener for Bosch E-Bike Systems

      The Trek Bosch G4 Speed Sensor is a reliable accessory designed to seamlessly integrate with your Bosch motor system. Engineered for precision, it ensures accurate speed readings, enhancing your riding experience. Its compact design includes a sturdy fastener (M4x14) for easy and secure mounting...
      £28.33
      £29.99
      £28.33
      Save £1.66
    • Grey Trek pedal trailer hitch kit for bikes with hitch head, compatible with 2004+ models, bike accessories for secure towing.Trek grey pedal trailer hitch kit for bike hitch head, compatible with 2004+ bikes, bike accessories for secure towing.

        Trek Pedal Trailer Hitch Kit Grey for Hitch Head 2004+ Bikes One Size

        The Trek Pedal Trailer Hitch Kit in Grey offers a secure, easy way to connect your child trailer to your bike. Designed for Hitch Head 2004+ with a 30mm hitch point width, it ensures a stable ride. Durable and reliable, this accessory perfectly fits...
        £18.89
        £19.99
        £18.89
        Save £1.10
      • Trek Elite recycled water bottle cage mounted on a bike, eco-friendly durable bike accessory for cycling hydration.Trek Elite Recycled Water Bottle Cage mounted on a bike, showcasing durable, eco-friendly bike accessories for cycling.

          Trek Elite Recycled Water Bottle Cage – Durable Eco-Friendly Bike Cage - Lunar Silver

          The Trek Cages - Elite Recycled Water Bottle Cage is the perfect blend of sustainability and performance for cyclists who demand the best from their gear. Made from high-quality recycled materials, this water bottle cage offers a strong, secure hold for your hydration needs...
          £8.10
          £9.99
          £8.10
          Save £1.89
          • Lunar Silver
          • Vice Pink
          • Black, Dark Grey
          • White
        • Trek right side load recycled water bottle cage mounted on a bike, eco-friendly durable accessories for cycling.Trek right side load recycled water bottle cage, durable eco-friendly bike accessory mounted on a bicycle frame.

            Trek Right Side Load Recycled Water Bottle Cage – Durable Eco-Friendly Bike Cage - White

            Stay hydrated and ride sustainably with the Trek Cages Right Side Load Recycled Water Bottle Cage. Made from recycled materials, this cage combines eco-friendly design with robust durability, making it an excellent choice for cyclists who value both performance and the environment. Its right...
            £8.91
            £10.99
            £8.91
            Save £2.08
            • White
            • Crimson
            • Olive Grey
            • Black
          • Trek Madone Gen 8 Aero Seatpost with finishing kit, lightweight carbon bike component for optimal saddle support and aerodynamics.Trek Madone Gen 8 aero bike seatpost with finishing kit, lightweight carbon component for high-performance road cycling.

              Trek Madone Gen 8 Seatpost with Finishing Kit – Aero Bike Seatpost Replacement - Carbon Smoke

              The Trek Seatpost - Madone Gen 8 Seatpost is expertly crafted to enhance your riding experience by delivering unmatched comfort and performance. Designed specifically for the Trek Madone Gen 8, this seatpost seamlessly integrates with the bike’s frame, preserving its aerodynamic advantage while providing...
              £259.99
              £259.99
              • Carbon Smoke
              • Viper Red
            • Trek Emonda SL chainstay exit grommets for cable and brake protection, bike components accessory with durable rubber construction.Trek Emonda SL chainstay exit grommets for cable and brake protection on bicycle components, black rubber with mounting holes.

                Trek Emonda SL Chainstay Exit Grommets for Cable & Brake Protection Accessories - Black

                Enhance your Trek Emonda SL with these durable chainstay exit grommets. Designed for seamless cable management, they ensure smooth brake and cable routing. Crafted for reliability, these grommets protect your cables from wear and tear, extending the lifespan of your bike components. What It’s...
                from £2.82
                £2.99
                from £2.82
                Save £0.17
                • Black
              • Trek Hub Part Trek Approved Looseball 6-Bolt Rebuild KitTrek Hub Part Trek Approved Looseball 6-Bolt Rebuild Kit

                Trek Approved Looseball 6-Bolt Hub Rebuild Kit for Trek Hubs Maintenance - Silver, Black

                Upgrade your bike’s performance with the Trek Approved Looseball 6-Bolt Rebuild Kit. Designed for durability and precision, this kit ensures smooth hub operation and extends the life of your wheels. Easy to install and compatible with a range of Trek hubs, it provides reliable...
                £18.89
                £19.99
                £18.89
                Save £1.10
                • Silver, Black
              • Trek Forks - Farley ForkTrek Forks - Farley Fork

                Trek Farley Fork – Durable Road Bike Fork for Precise Steering and Control - Black

                Discover the Trek Farley Fork, designed for precision and durability. Its robust construction ensures smooth steering on all road types, enhancing your ride quality. Crafted to fit seamlessly with your bike, this fork offers reliability and control for every adventure. Its sleek black finish...
                £415.79
                £439.99
                £415.79
                Save £24.20
                • Black
                • Lava
                • Mercury
                • Blue Sage,Lithium Grey
              • Trek Rocker Pivot Bolt M10 x 1.5 thread, 84mm length, black and blue suspension bolt for bike components.Trek Rocker Pivot Bolt M10 x 1.5 thread, 84mm length, black and blue suspension bolt for mountain bike components.

                  Trek Rocker Pivot Bolt M10 x 1.5 Thread, 84mm Black/Blue Suspension Bolt - Black-Blue

                  The Trek Rocker Pivot Bolt M10 x 1.5 is a durable, precision-engineered component designed for optimal bike frame performance. Its alloy construction ensures strength while maintaining a lightweight profile, essential for demanding rides. With a length of 84mm and a sleek black/blue finish, this...
                  £9.44
                  £9.99
                  £9.44
                  Save £0.55
                  • Black-Blue
                • Trek Madone SL 5 Gen 8 aero road bike with lightweight frame, aerodynamic design, and sleek black finish for speed and climbing.Trek Madone SL 5 Gen 8 aero road bike with lightweight frame, aerodynamic design, and racing tires for speed and climbing.

                  Trek Madone SL 5 Gen 8 Aero Road Bike for Speed and Climbing Performance - Gloss Dark Star/Matte Deep Smoke

                  The Trek Madone SL 5 Gen 8 Aero Road Bike represents the pinnacle of aerodynamic engineering combined with the strength and lightness of 500 Series OCLV Carbon. This bike is meticulously crafted to enhance speed and climbing efficiency, making it a top choice for...
                  £2,828.26
                  £2,900.00
                  £2,828.26
                  Save £71.74
                  • Gloss Crystal White/Matte Deep Smoke
                  • Gloss Dark Star/Matte Deep Smoke
                  • Gloss Fury Red/Matte Deep Smoke
                  • Matte Lavender Haze/Deep Smoke
                • Trek Checkpoint ALR 4 Gen 3 gravel bike with multiple mounts for adventure, commuting, and long rides, shown from the front angle.Trek Checkpoint ALR 4 Gen 3 gravel bike with multiple mounts for adventure, commuting, and long rides, shown in a side view.

                  Trek Checkpoint ALR 4 Gen 3 Gravel Bike with Multiple Mounts for Adventure, Commuting & Long Rides - Living Coral

                  The Trek Checkpoint ALR 4 Gen 3 Gravel Bike exemplifies versatility and robust design, tailored for riders seeking adventure and practicality. Its updated aluminum frame integrates multiple mounts for racks, mudguards, and bags, enabling efficient gear transport for extended journeys. This model is engineered...
                  £1,362.97
                  £1,400.00
                  £1,362.97
                  Save £37.03
                  • Living Coral
                  • Matte Keswick Green to Lichen Fade
                • Trek Checkpoint ALR 3 Gen 3 gravel bike with front and rear rack mounts, suited for adventure riding.Trek Checkpoint ALR 3 Gen 3 gravel bike with front and rear racks and bag mounts, designed for adventure riding.

                  Trek Checkpoint ALR 3 Gen 3 Gravel Bike with Front and Rear Rack & Bag Mounts for Adventure Riding - Dark Carmine

                  The Trek Checkpoint ALR 3 Gen 3 Gravel Bike is engineered to meet the demands of serious adventure cyclists, combining versatility with robust construction. Its thoughtfully designed frame includes dedicated mounts for front and rear racks, mudguards, and a variety of bags, allowing riders...
                  £1,171.26
                  £1,200.00
                  £1,171.26
                  Save £28.74
                  • Dark Carmine
                • Trek 24-inch mountain bike wheel with 6-bolt disc brake mount, quick-release, 28-hole alloy rim for MTB componentsTrek 24-inch mountain bike wheel with 6-bolt disc brake, quick-release, 28-hole rim for MTB riding and durability

                  Trek 24" MTB Wheel with 6-Bolt Disc Brake, Quick-Release, 28-Hole MTB Wheel - Black

                  Upgrade your mountain bike with the Trek 24"" Disc MTB Wheel, designed for durability and performance. Its robust construction ensures reliable traction on rough trails. The 6-bolt disc compatibility offers secure braking power for confident rides. Precision-built with 28 holes and quick-release design, this...
                  from £80.32
                  £84.99
                  from £80.32
                  Save £4.67
                  • Black
                • Trek Abp Race Rear SkewersBontrager ABP Race Rear Skewer Black Rear 197mm | Swinnerton Cycles

                    Bontrager ABP Race Rear Skewer 197mm Black for Trek ABP Suspension Bikes

                    Upgrade your bike's rear wheel security with the Bontrager ABP Race Rear Skewer. Crafted for durability and precision, its 197mm length ensures a perfect fit for your Trek setup. The sleek black chromoly design not only looks great but also offers reliable performance under...
                    £18.89
                    £19.99
                    £18.89
                    Save £1.10
                  • Trek Abp Dh Rear Thru Axle Bolt SkewersTrek ABP DH Rear Thru Axle Bolt Black Rear | Swinnerton Cycles

                      Trek ABP DH Rear Thru Axle Bolt Black for Rear Wheel Suspension Upgrade

                      Upgrade your bike's rear axle with the Trek ABP DH Rear Thru Axle Bolt. Designed for durability and precise fit, this black bolt ensures secure wheel attachment and smooth suspension performance. Crafted to meet Trek’s high standards, it enhances the stability and handling of...
                      £28.33
                      £29.99
                      £28.33
                      Save £1.66
                    • Trek Hub Part Trek Approved Fm-32 135Mm Rr. Hub Rebuild Kit Hub PartBontrager Approved Loose Ball City/MTB Rear Hub Axle Kit Silver/Black 135mm OLD FT/RR | Swinnerton Cycles

                        Bontrager Approved Loose Ball Rear Hub Axle Kit 135mm OLD City/MTB Rear Hub

                        Upgrade your Trek hub with the Bontrager Approved Loose Ball Rear Hub Axle Kit. Designed for 135mm OLD, this kit ensures smooth performance and reliable durability for city and MTB riding. Easy to install and compatible with a variety of Trek hubs, it offers...
                        £18.89
                        £19.99
                        £18.89
                        Save £1.10
                      • Trek Hub Part Trek Approved Fm-31 Freewheel Rr. Hub Rebuild Kit Hub PartBontrager Approved Loose Ball Rear Freewheel Hub Axle Kit Silver/Black 135mm OLD FT/RR | Swinnerton Cycles

                          Bontrager Rear Freewheel Hub Axle Kit 135mm OLD FT/RR Silver Black Approved

                          Upgrade your bike with the Bontrager Approved Loose Ball Rear Freewheel Hub Axle Kit. Designed for durability and smooth performance, this 135mm OLD FT/RR axle kit ensures reliable hub function and easy maintenance. Crafted by Trek, it fits perfectly within your wheel assembly, enhancing...
                          £18.89
                          £19.99
                          £18.89
                          Save £1.10
                        • Trek 6800 Replacement Rear Suspension Bearing Hub PartsTrek Full Suspension 12x28x8mm Heavy Contact Sealed Bearing Grey/Red Grey/Red Size | Swinnerton Cycles

                            Trek Full Suspension 12x28x8mm Sealed Bearings for Wheel and Hub Performance

                            Upgrade your Trek or Gary Fisher full suspension bike with these durable 12x28x8mm sealed bearings. Designed for smooth performance and long-lasting reliability, they ensure your ride stays responsive and efficient. What It’s Good For Enhancing wheel and hub performance with reduced friction Providing a...
                            £9.99
                            £9.99
                          • Trek Powerfly 2018 Driveside Chainguide Tab E-Bike SparesTrek 2018 Powerfly Driveside Chainguide Tab Black One size | Swinnerton Cycles

                              Trek 2018 Powerfly Driveside Chainguide Tab Black for e-MTB Frame Support

                              The Trek 2018 Powerfly Driveside Chainguide Tab in black offers reliable support for your e-MTB frame. Designed for durability, it ensures smooth chain retention on your rides. What It’s Good For Maintaining chain alignment on e-MTBs Enhancing drivetrain reliability Easy installation on compatible frames...
                              £6.99
                              £6.99
                            • Trek 2018 Powerfly black motor chainguide for non-drive side e-MTB protection, mounted on mountain bike component.Trek 2018 Powerfly black motor chainguide for non-drive side e-MTB protection, mounted on electric mountain bike component.

                                Trek 2018 Powerfly Black Motor Chainguide for Non-Drive Side e-MTB Protection

                                The Trek 2018 Powerfly Chainguide Black Motor offers reliable protection for your e-MTB’s motor. Designed specifically for the non-drive side, it ensures durability and maintains optimal performance. Its sleek black finish complements the overall look of your bike while safeguarding critical components. What It’s...
                                £9.44
                                £9.99
                                £9.44
                                Save £0.55
                              • Trek 3S Chain Keeper Chain DeviceTrek 3S Chain Keeper Black One size | Swinnerton Cycles

                                  Trek 3S Chain Keeper for 1x Drivetrains, Black, Fits 38-46T Chainrings

                                  The Trek 3S Chain Keeper in black is designed specifically for 1x drivetrains, offering a reliable replacement for the stock 3S chain keeper. Compatible with 38 to 46 tooth chainrings, it ensures smooth chain retention and minimizes chain drop. For optimal performance, position the...
                                  £18.89
                                  £19.99
                                  £18.89
                                  Save £1.10
                                • Trek 90mm black bicycle stem with 35° rise and 55mm height, designed for improved steering control on bike components.Trek 90mm black bike stem with 35-degree rise and 55mm height, designed for enhanced steering control on components.

                                    Trek 90mm Black Stem 35 Degree Rise 55mm High for Enhanced Steering Control

                                    The Trek 55mm High 35 Degree Rise Stem in Black is designed to elevate your riding experience by improving steering precision and comfort. Featuring a 35-degree rise and a 90mm length, this stem strikes the perfect balance between control and ergonomic posture, ideal for...
                                    £18.89
                                    £19.99
                                    £18.89
                                    Save £1.10
                                  • Trek Knock Block 72-Degree Headset Frame Chip in black for steering protection on bicycle components.Trek Knock Block 72-Degree Headset Frame Chip in black for steering protection, showing close-up of the headset component.

                                      Trek Knock Block 72-Degree Headset Frame Chip Black for Steering Protection

                                      Enhance your bike’s steering safety with the Trek Knock Block 72-Degree Headset Non-Block Frame Chip. Designed to prevent handlebar over-rotation, this black frame chip protects your frame from damage during sharp turns. Its durable construction ensures long-lasting performance for your Trek bike. What It’s...
                                      £12.28
                                      £12.99
                                      £12.28
                                      Save £0.71
                                    • Trek Knock Block 72-Degree Headset Assembly With Display Chi Spares & AccessoriesTrek Knock Block 72-Degree Headset Assembly with Display Chip Black 28.6 mm (1-1/8") | Swinnerton Cycles

                                        Trek Knock Block 72-Degree Headset Assembly with Integrated Display Chip 28.6mm (1-1/8") Black

                                        The Trek Knock Block 72-Degree Headset Assembly features a sleek design with a built-in display chip. Its 28.6 mm (1-1/8") size ensures compatibility with various bikes, offering precise steering control and enhanced durability. Crafted for smooth handling, this headset assembly improves your riding experience...
                                        £51.97
                                        £54.99
                                        £51.97
                                        Save £3.02
                                      • Trek Knock Block 62-Degree Headset Assembly With Display Chi Spares & AccessoriesTrek Knock Block 62-Degree Headset Assembly with Display Chip Black 28.6 mm (1-1/8") | Swinnerton Cycles

                                          Trek Knock Block 62-Degree Headset Assembly with Display Chip for 28.6mm Head Tubes

                                          The Trek Knock Block 62-Degree Headset Assembly enhances steering precision and safety. Its integrated display chip offers real-time info while riding. What It’s Good For Improves steering control with 62-degree rotation limit Compatible with 28.6 mm (1-1/8") head tubes Includes display chip for easy...
                                          £51.97
                                          £54.99
                                          £51.97
                                          Save £3.02
                                        • Trek Knock Block 58-Degree Headset Assembly With Display Chi Spares & AccessoriesTrek Knock Block 58-Degree Headset Assembly with Display Chip Black 28.6 mm (1-1/8") | Swinnerton Cycles

                                            Trek Knock Block 58-Degree Headset Assembly with Display Chip Black 28.6mm 1-1/8"

                                            Upgrade your bike's steering with the Trek Knock Block 58-Degree Headset Assembly. Designed for precision and durability, this black 28.6 mm (1-1/8") component enhances control and stability. Featuring an integrated display chip, it offers seamless compatibility with Trek’s technology, ensuring smooth performance and easy...
                                            £51.97
                                            £54.99
                                            £51.97
                                            Save £3.02
                                          • Trek Knock Block Headset Spacers Spares & AccessoriesTrek Knock Block Headset Spacers Spares & Accessories

                                            Trek Knock Block Headset Spacers 3-Pack 5mm for Knock Block Bikes Accessories - Trek Black

                                            Enhance your bike's steering precision with the Trek Knock Block Headset Spacers. These 5mm black spacers come in a convenient 3-pack, ensuring a perfect fit and easy customization. Designed specifically for the Trek Knock Block system, they provide reliable support and improve headset alignment...
                                            £33.06
                                            £34.99
                                            £33.06
                                            Save £1.93
                                            • Trek Black
                                          • Trek Madone Slr Headset Compression Plug Spares & AccessoriesTrek Madone Slr Headset Compression Plug Spares & Accessories

                                              Trek Madone SLR Headset Compression Plug 28.6mm Black for Smooth Steering

                                              Enhance your Trek Madone SLR with this precise headset compression plug. Designed for a perfect fit at 28.6mm (1-1/8''), it ensures smooth steering and reliable performance. Crafted to maintain headset integrity, this black compression plug blends durability with sleek aesthetics. What It’s Good For...
                                              £37.79
                                              £39.99
                                              £37.79
                                              Save £2.20
                                            • Trek Kickster 1"" Steering Limiting Threaded Headset Spares & Accessories

                                                Trek Kickster 1" Threaded Steering Limiting Headset Silver 25.4mm Bike Part

                                                Enhance your bike’s control with the Trek Kickster 1˝ Steering Limiting Threaded Headset in sleek silver. Designed for 25.4 mm (1") steerers, this headset improves steering precision and stability. Durable and reliable, it’s an essential component for smooth, responsive handling on every ride. What...
                                                £9.44
                                                £9.99
                                                £9.44
                                                Save £0.55
                                              • Black FSA 41mm IS headset upper cover for Trek bikes, protecting steering components and ensuring a secure fit.Black FSA 41mm IS headset upper cover for Trek bikes, providing steering protection and secure fit.

                                                  FSA 41mm IS Headset Upper Cover Black – Bike Steering Protection & Fit

                                                  Enhance your bike’s steering with the FSA 41mm IS Headset Upper Cover. This sleek black cover ensures a secure fit and protects your headset from dirt and damage, maintaining smooth handling on every ride. Designed for durability and easy installation, it’s an essential component...
                                                  £10.38
                                                  £10.99
                                                  £10.38
                                                  Save £0.61
                                                Recently Viewed Products

                                                Trek bikes are biking models that deliver exceptional performance, comfort and durability time and time again. Here at Swinnerton Cycles, we have a selection of Trek bikes for you to explore depending on the type of cycling adventure you want to venture on. Explore Trek e-bikes, MTB by Trek and for those who want to rack up miles on the road, we have a selection of road bikes by Trek.
                                                Trek bikes offer speed, comfort and durability

                                                Over four decades, Trek has meticulously perfected the technical expertise needed to deliver bikes of the highest quality. Within the range of Trek bikes available here at Swinnerton Cycles, you will find premium carbon crafted models that are lightweight for speed but are durable and designed to give you a ride that is controlled. 
                                                Trek bicycles for any terrain 
                                                No matter what type of terrain you like to ride on, you will find a bike within the range of Trek bikes to suit your needs. If you would like to explore the range of biking accessories to enhance your cycling experience, we have a wide range of items for you to choose from including bottle cages to hold your drinks cup to first aid kits for any accidents that may occur.

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