Bike Seatpost Spares & Accessories

Seatpost Spares & Accessories at Swinnerton CyclesKeep your seatpost and dropper post in perfect working order with our range of seatpost spares and accessories at Swinnerton Cycles. From shims and clamp ears to saddle clamp hardware and remote lever kits, we stock the components needed to maintain and adapt your...

Seatpost Spares & Accessories at Swinnerton Cycles

Keep your seatpost and dropper post in perfect working order with our range of seatpost spares and accessories at Swinnerton Cycles. From shims and clamp ears to saddle clamp hardware and remote lever kits, we stock the components needed to maintain and adapt your seatpost setup. Seatpost shims are particularly useful when upgrading frames or seatposts with different diameter requirements. We stock seatpost spares from Cane Creek, Trek, Bontrager, and other leading brands. Browse our full Bike Seating collection and explore Dropper Seatposts and Standard Seatposts.

Popular Seatpost Spares

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  • Crankbrothers Highline seatpost screw M5x1x41.5, hex replacement component for bike seatpost adjustment.

      Crankbrothers Highline Seatpost Screw M5x1x41.5 Hex Replacement Part

      The Crankbrothers Seatpost Highline Screw M5x1x41 5 Hex is engineered with precision to deliver reliable performance for your Highline seatpost. Crafted by Crankbrothers, a renowned brand in cycling components, this screw ensures a perfect fit and secure fastening. Its M5x1x41 5 Hex design provides...
      £1.00
      £1.00
    • Crankbrothers Highline seatpost maintenance kit with components for smooth performance and easy bike saddle adjustments.

        Crankbrothers Highline Seatpost Maintenance Kit for Smooth Performance

        Keep your Crankbrothers Highline seatpost performing smoothly with this essential maintenance kit. It includes all key components to ensure reliable operation and longevity. Easy to install, it helps maintain precision and comfort on every ride. What It’s Good For Replacing worn Igus guide blocks...
        £26.31
        £29.99
        £26.31
        Save £3.68
      • crank brothers crankbrothers seatpost spares s post highline crtdge valve adapt p109276

          Crankbrothers Highline Seatpost Cartridge Valve Adapter for Easy Replacement

          Upgrade your Crankbrothers Highline seatpost with this reliable cartridge valve adapter. Designed for easy replacement and maintenance, it ensures optimal performance and durability. What It’s Good For Maintaining smooth seatpost function Easy installation and replacement Enhancing seatpost longevity What It’s NOT Good For Not...
          £1.99
          £1.99
        • crank brothers crankbrothers seatpost spares s post highline 7 crtdge assy 170mm p109260

            Crankbrothers Highline 7 Cartridge Assembly 170mm for Dropper Seatpost Replacement

            The Crankbrothers Highline 7 Cartridge Assembly 170mm is engineered to deliver superior performance and durability for your bicycle seatpost. Designed by Crankbrothers, a leader in cycling innovation, this cartridge assembly ensures smooth and reliable operation of the Highline 7 dropper post system. Its 170mm...
            £84.99
            £84.99
          • crank brothers crankbrothers seatpost spares s post highline 3 quill assy 150mm p109255

              Crankbrothers Highline 3 Quill Assembly 150mm – Bike Seatpost Spare Part

              The Crankbrothers Highline 3 Quill Assembly 150mm is expertly crafted to deliver exceptional performance and durability for your bike’s seatpost system. Designed by Crankbrothers, a trusted name known for innovative cycling components, this quill assembly guarantees a secure and stable connection that enhances your...
              £36.99
              £36.99
            • Cane Creek Eesilk Post Axle Nut Spares & AccessoriesCane Creek eeSilk Post Axle Nut Silver | Swinnerton Cycles

                Cane Creek eeSilk Seatpost Axle Nut Silver – Durable Replacement Part

                Upgrade your Cane Creek seatpost with the eeSilk Post Axle Nut Silver. Designed for durability and precision, it ensures a secure fit and smooth performance. This essential component enhances the longevity of your seatpost while adding a sleek silver finish for a polished look....
                £5.49
                £5.49
              • Crankbrothers Highline 3 200mm dropper post replacement cartridge and actuator in black, showing the components and mechanism.Crankbrothers Highline 3 200mm dropper post replacement cartridge and actuator in black, components for bike suspension system.

                  Crankbrothers Highline 3 200mm Dropper Post Replacement Cartridge & Actuator Black

                  Upgrade your Highline 3 200mm dropper post with this reliable replacement cartridge and actuator. Designed for seamless fit and optimal performance, it ensures smooth operation and durability. What It’s Good For Restoring functionality to your Highline 3 dropper post Easy installation with precise compatibility...
                  £42.99
                  £42.99
                • Crankbrothers Highline 3 / Xcg Replacement Upper Clamp Bolt Assembly Spares & AccessoriesCrankbrothers Highline 3 / XCG replacement upper clamp bolt assembly Black | Swinnerton Cycles

                    Crankbrothers Highline 3 & XCG Replacement Upper Clamp Bolt Assembly Black

                    Upgrade your Crankbrothers Highline 3 or XCG seatpost with this replacement upper clamp bolt assembly. Designed for a secure fit, it ensures reliable performance and durability. Crafted for easy installation, this bolt assembly helps maintain the integrity of your seatpost, keeping your rides smooth...
                    £2.50
                    £2.50
                  • Bontrager Line Dropper 34.9Mm Actuator Assembly Spares & AccessoriesBontrager Line Dropper 34.9mm Actuator Assembly Black One size | Swinnerton Cycles

                      Bontrager Line Dropper 34.9mm Actuator Assembly for Seatpost Control Black

                      The Bontrager Line Dropper 34.9mm Actuator Assembly offers smooth and reliable seatpost control. Designed for precise adjustment, it enhances your ride comfort and performance. Crafted with durable materials, this actuator assembly ensures long-lasting functionality and easy installation. Perfect for upgrading or replacing your seatpost...
                      £13.22
                      £13.99
                      £13.22
                      Save £0.77
                    • Bontrager Seatpost Part Bontrager Line Elite 34.9Mm Dropper Actuator Spares & AccessoriesBontrager Line Elite Dropper 34.9mm Post Actuator Black One size | Swinnerton Cycles

                        Bontrager Line Elite Dropper Post Actuator 34.9mm Black with Finishing Kit

                        Upgrade your ride with the Bontrager Line Elite Dropper Actuator in 34.9mm. Designed for smooth, reliable seatpost control, this actuator enhances your bike’s responsiveness. Crafted with precision, it ensures effortless adjustments on the trail, improving your comfort and performance. Its sleek black finish adds...
                        £33.06
                        £34.99
                        £33.06
                        Save £1.93
                      • Bontrager Line Dropper Bushing Kit Spares & AccessoriesBontrager Line Dropper Bushing Kit Black One size | Swinnerton Cycles

                          Bontrager Line Dropper Seatpost Bushing Kit Black One Size Replacement Parts

                          Keep your Bontrager Line Dropper seat post performing like new with this genuine replacement bushing kit. Designed for easy installation, it ensures smooth operation and durability. Regularly replacing bushings helps maintain consistent dropper function and extends the life of your seat post, saving you...
                          £9.44
                          £9.99
                          £9.44
                          Save £0.55
                        • Bontrager Line Elite dropper seatpost cartridge replacement component for bike dropper seatpost and spare parts.Bontrager Line Elite dropper seatpost cartridge replacement component for bike dropper seatpost, spare parts and accessories.

                          Bontrager Line Elite Dropper Seatpost Cartridge Replacement Spares & Accessories - Silver

                          The Bontrager Line Elite Dropper Seatpost Cartridge ensures your dropper post performs smoothly and reliably. Designed for easy replacement, it helps maintain optimal function and extends the lifespan of your seatpost. Regular maintenance with genuine cartridge spares keeps your ride responsive and enhances durability,...
                          £51.97
                          £54.99
                          £51.97
                          Save £3.02
                          • Silver
                        • Bontrager Line Elite Dropper Lever B-Spec Seatpost Adapter Spares & AccessoriesBontrager Line Elite Dropper Lever B-Spec Seatpost Adapter Spares & Accessories | Swinnerton Cycles

                            Bontrager Line Elite Dropper Lever B-Spec Seatpost Adapter Spare Parts & Accessories

                            Enhance your ride with the Bontrager Line Elite Dropper Lever B-Spec Adapter. Designed for seamless integration, this adapter ensures smooth seatpost control and reliable performance on every trail. Crafted with precision, it fits perfectly with Shimano B-Spec mounts, making upgrades or replacements effortless. Durable...
                            £10.00
                            £10.00
                          • Bontrager Line Dropper Seatpost Cartridge spare for 34.9mm bike seatposts, showing the component and accessories.Bontrager Line Dropper seatpost cartridge spare for 34.9mm posts, shown with accessories on a white background.

                            Bontrager Line Dropper Seatpost Cartridge Spare for 34.9mm Posts & Accessories - Silver

                            Upgrade your Bontrager Line Dropper Seatpost with this reliable cartridge spare. Designed for smooth operation and durability, it ensures consistent performance on every ride. What It’s Good For Maintaining optimal dropper seatpost function Extending the lifespan of your seatpost Easy installation with precise fit...
                            from £33.06
                            £34.99
                            from £33.06
                            Save £1.93
                            • Silver
                          • Bontrager quick release seatpost clamp with laser-etched torque guide, showing the clamp and adjustable mechanism.Bontrager quick release seatpost clamp with laser-etched torque guide, showing the clamp and attached components.

                            Bontrager Quick Release Seatpost Clamp with Laser-Etched Torque Guide Spares & Accessories - Black

                            Bontrager Quick Release Seatpost Clamp offers secure and easy adjustment for your bike seat. Crafted for durability and precise fit, it ensures reliable seatpost locking. Designed with a laser-etched torque guide, it guarantees optimal tightening without damaging components. Compatible with multiple diameters for versatile...
                            £12.28
                            £12.99
                            £12.28
                            Save £0.71
                            • Black
                          • Crankbrothers Highline Traction Pads Rainbow thumb grip replacement for Highline remote mountain bike components.Crankbrothers Highline Traction Pads Rainbow thumb grip replacement for Highline remote control components.

                              Crankbrothers Highline Traction Pads Rainbow – Thumb Grip Replacement for Highline Remote

                              Enhance your control with the Crankbrothers Highline Traction Pads, designed to boost thumb grip on your Highline remote. These pads reduce accidental post activations, ensuring smooth and precise adjustments every ride. Available in a stunning rainbow array of 8 colors, they let you customize...
                              £6.14
                              £6.99
                              £6.14
                              Save £0.85
                            • M Part bike seat clamp with rack mount, durable component for securing bike seats and racks.M Part bike seat clamp with rack mount, made for bike components, showing the clamp and mounting features in close-up.

                              M Part Seat Clamp with Rack Mount for Bikes – Spares & Accessories - Black

                              The M Part Seat Clamp With Rack Mount is designed to securely attach a rear rack to your bike, even if it lacks dedicated rack braze-ons. Featuring 2 x M5 bosses at the rear, this clamp ensures a stable and reliable fit. Available in...
                              £9.66
                              £12.99
                              £9.66
                              Save £3.33
                              • Black
                            • M Part Clamp Thrsaver 31.8Mm Spares & AccessoriesM Part Threadsaver seat clamp 31.8 mm, black | Swinnerton Cycles

                                M Part Threadsaver Seat Clamp 31.8 mm Black – Durable Bike Frame Protector

                                The M Part Threadsaver seat clamp 31.8 mm is engineered to protect your bike’s frame and enhance durability. Its innovative rotating thread insert prevents thread damage and bent bolts, ensuring long-lasting reliability. Crafted from black anodised aluminium alloy with stainless steel hardware, it combines...
                                £6.67
                                £8.99
                                £6.67
                                Save £2.32
                              • Shimano Deore SL-MT500-L left-hand dropper seatpost lever, I-Spec EV compatible, with ergonomic design and metal construction.Shimano Deore SL-MT500-L left-hand dropper seatpost lever compatible with I-Spec EV, showcasing ergonomic design and mounting features.

                                  Shimano Deore SL-MT500-L Left-Hand Dropper Seatpost Lever I-Spec EV Compatible

                                  The Shimano Deore SL-MT500-L is a reliable, lightweight dropper post lever designed for smooth seatpost adjustments. Its 9 mm cable pull ensures precise control and is compatible with most dropper seatposts. The I-spec EV system allows seamless integration with brake levers. Engineered for durability...
                                  £21.93
                                  £24.99
                                  £21.93
                                  Save £3.06
                                • SDG Slater 22.2mm shim kit for JR 650 handlebars, showing metal components and packaging for bike spare parts.SDG Slater 22.2mm handlebar shim kit for JR 650 bike handlebars, showing metal spacers and installation components.

                                    SDG Slater 22.2mm Shim Kit for JR 650 Handlebars – Spares & Accessories

                                    The SDG Slater 22.2mm Shim Kit is designed to securely fit standard controls onto Slater JR 650 handlebars. Crafted from durable, lightweight nylon, it ensures a reliable and easy installation. With 4 x 15mm shims included, this kit offers a perfect fit and enhanced...
                                    £5.22
                                    £5.95
                                    £5.22
                                    Save £0.73
                                  • Passport standard saddle clamp for twin-railed saddles and seat post accessories, showing a sturdy metal component for bike seats.Passport standard saddle clamp for twin-railed saddles and seat post accessories, showing durable metal construction and mounting hardware.

                                    Passport Standard Saddle Clamp for Twin-Railed Saddles & Seat Post Accessories - Silver

                                    The Passport Standard Saddle Clamp is designed for reliable attachment of twin-railed saddles to plain tube seat posts without micro-adjust heads. Crafted from durable ED black steel, it ensures long-lasting performance and secure mounting. Featuring twin nuts for balanced tightening and a safety top...
                                    from £2.99
                                    £26.99
                                    from £2.99
                                    Save £24.00
                                    • Silver
                                    • Black
                                  • Genetic Race Seatbolt spares with integrated clamps for classic bike frames, showing metal components and mounting details.Genetic Race Seatbolt spares with integrated clamps for classic bike frames, shown in close-up detail.

                                    Genetic Race Seatbolt Spares & Accessories for Classic Bike Frames with Integrated Clamps - Chrome

                                    Enhance your bike's reliability with the Genetic Race Seatbolt Spares & Accessories. Designed for classic frames featuring integrated clamps, these seat binders provide a secure hold with 8mm bolts crafted from durable Cr-Mo steel. The fixed side includes a unique "key" that locks into...
                                    £2.99
                                    £2.99
                                    • Chrome
                                  • Rock Shox Reverb Hydraulic Fluid 120Ml Bottle New Spares & AccessoriesRockShox Reverb Hydraulic Fluid, 120ml Bottle - Reverb A1-B1 Post/All Reverb Remotes/Sprint Remotes: | Swinnerton Cycles

                                      RockShox Reverb Hydraulic Fluid 120ml for A1-B1 Post & Sprint Remotes Maintenance

                                      Maintain smooth, reliable performance with RockShox Reverb Hydraulic Fluid. This 120ml bottle ensures your Reverb A1-B1 post and remotes operate flawlessly. Engineered for optimal hydraulic function, it prolongs the life of your seatpost and remotes while providing consistent feel and control. What It’s Good...
                                      £4.20
                                      £5.00
                                      £4.20
                                      Save £0.80
                                    • Fox 22.2mm remote band clamp for forks and shocks, motorcycle components and accessories, shown in close-up view.Fox 22.2mm remote band clamp for forks and shocks, showing a sturdy metal component with adjustable band and Fox branding.

                                        Fox 22.2mm Remote Band Clamp for Forks & Shocks Spares Accessories

                                        Upgrade your Fox suspension with this 22.2mm remote band clamp. Designed for secure attachment and smooth remote operation, it ensures reliable performance on every ride. Crafted as a durable finishing kit, this clamp fits seamlessly with your seatpost and suspension components for easy maintenance...
                                        £31.14
                                        £32.95
                                        £31.14
                                        Save £1.81
                                      • Fox Transfer Saddle Clamp Lower for 2021 mountain bike seatpost, durable component accessory.Fox Transfer saddle clamp lower part for 2021 model, seatpost spare component with black finish and metal construction.

                                          Fox Transfer Saddle Clamp Lower 2021 | Seatpost Spare & Accessory

                                          The 2021 Fox Transfer Saddle Clamp Lower offers secure and reliable support for your seatpost. Designed to perfectly fit Fox Transfer seatposts, it ensures smooth adjustment and stability during rides. Crafted with high-quality materials, this spares & accessories component enhances durability and performance. Easy...
                                          £15.36
                                          £16.25
                                          £15.36
                                          Save £0.89
                                        • System EX MTB seatpost clamp quick release, 15mm height, bike component, spare part for secure seatpost attachment.System EX MTB seatpost clamp quick release spare component with 15mm height for bike maintenance and adjustments.

                                          System Ex MTB Seatpost Clamp Quick Release Spares & Accessories 15mm Height - Black

                                          Enhance your MTB setup with the System Ex Seatpost Clamp featuring a quick-release lever for fast adjustments. Crafted from durable extruded alloy, it offers reliable strength while remaining lightweight. The matt black finish adds a sleek, stealthy look, complementing any bike style. At 15mm...
                                          £4.41
                                          £6.99
                                          £4.41
                                          Save £2.58
                                          • Black
                                        • System EX MTB seatpost clamp with Allen bolt fixing, spare component for bike maintenance and replacement.System EX MTB seatpost clamp with Allen bolt fixing, spare component for bike seatpost adjustment and secure fitting.

                                          System Ex MTB Seatpost Clamp Spare & Accessory with Allen Bolt Fixing - Black

                                          Upgrade your MTB with the System Ex Seatpost Clamp, designed for secure and lightweight performance. Crafted from extruded alloy, it ensures durability without extra weight. Available in anodised silver or matt black, it adds a sleek finish to your bike. With a 15mm height...
                                          from £3.14
                                          £4.99
                                          from £3.14
                                          Save £1.85
                                          • Black
                                          • Silver
                                        • Aenomaly SwitchGrade Fitting Kit E for Fox Transfer 2025 dropper post, components for installation, black and silver parts.

                                            Aenomaly SwitchGrade Fitting Kit E for Fox Transfer 2025 Dropper Post Installation - Black

                                            The Aenomaly SwitchGrade Fitting Kit E is a precision-engineered solution designed to enhance your bike’s dropper post installation experience. Crafted by Aenomaly, a brand renowned for its innovative components, this kit provides everything necessary to ensure a secure, adjustable, and smooth setup. With its...
                                            £23.62
                                            £25.00
                                            £23.62
                                            Save £1.38
                                            • Black
                                          • Aenomaly SwitchGrade Fitting Kit A components for dropper seatpost installation and adjustment, featuring metal fittings and adapters.

                                              Aenomaly SwitchGrade Fitting Kit A for Dropper Seatpost Installation & Adjustment - Black

                                              The Aenomaly SwitchGrade Fitting Kit A is a meticulously crafted components kit designed to enhance the installation and adjustment of your dropper seatpost. With a comprehensive assortment of hardware including multiple M5 bolts of varying lengths, cylinder nuts, spherical and flat washers, dust cap,...
                                              £9.44
                                              £10.00
                                              £9.44
                                              Save £0.56
                                              • Black
                                            • Placeholder image

                                                Crankbrothers Highline XCG Quill Assembly Seatpost Component for Bike Stability

                                                The Crankbrothers Highline XCG Quill Assembly is a meticulously designed component that elevates the functionality and durability of your bicycle’s seatpost system. Engineered by Crankbrothers, a leader in innovative cycling solutions, this finishing kit ensures a secure fit and smooth operation for the Highline...
                                                £36.99
                                                £36.99
                                              Recently Viewed Products

                                              Maintain and upgrade your seatpost setup with our range of seatpost spares and accessories at Swinnerton Cycles. From saddle clamps and collar bolts to dropper post service kits and remote levers, we stock the components needed to keep your seatpost performing at its best. Browse our full Seatposts collection and explore Dropper Seatposts and Bike Saddles.

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