Bike Rear Mech

Bike Rear Mechs at Swinnerton CyclesPrecise, reliable gear changes start with a quality rear derailleur. Our bike rear mech collection at Swinnerton Cycles covers road, MTB, and gravel options from all major groupset manufacturers — from entry-level mechanical systems to top-tier wireless electronic derailleurs. The rear derailleur is one of...

Bike Rear Mechs at Swinnerton Cycles

Precise, reliable gear changes start with a quality rear derailleur. Our bike rear mech collection at Swinnerton Cycles covers road, MTB, and gravel options from all major groupset manufacturers — from entry-level mechanical systems to top-tier wireless electronic derailleurs. The rear derailleur is one of the most critical components in your drivetrain, and choosing the right one for your cassette range, frame, and groupset is essential. We stock rear mechs from Shimano, SRAM, Campagnolo, and MicroSHIFT. Explore Road Rear Mechs, MTB Rear Mechs, Gravel Rear Mechs, and Rear Mech Spares.

Popular Rear Mechs

Road Rear Mech

Road Rear Mech
MTB Rear Mech

MTB Rear Mech
Gravel Bike Rear Mech

Gravel Bike Rear Mech
Jockey Wheels

Jockey Wheels
Rear Mech Spares

Rear Mech Spares
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  • SunRace RDMZ600 12s MD Rear Derailleur

    SunRace RDMZ600 12-Speed Rear Derailleur with Adjustable Chain Stabilizer for 1x Drivetrains - Black

    The SunRace RDMZ600 12s MD Rear Derailleur offers precise shifting performance for 12-speed drivetrains. Featuring an adjustable chain stabilizer and durable forged alloy links, it ensures smooth transmission and reliability on every ride. Designed with a lightweight alloy cage, this rear mech balances strength...
    £69.50
    £77.50
    £69.50
    Save £8.00
    • Black
  • SunRace RDMX600

    SunRace RDMX600 11-Speed Rear Derailleur with Adjustable Chain Stabilizer for 1x Systems - Black

    The SunRace RDMX600 rear derailleur offers precise shifting for 11-speed drivetrains, ideal for riders seeking smooth performance. Its adjustable chain stabilizer and forged alloy links ensure durability and stability on varied terrain. With a lightweight alloy cage and a design compatible with 1x systems...
    £69.50
    £77.50
    £69.50
    Save £8.00
    • Black
  • SunRace RDMS100

    SunRace RDMS100 10-Speed Rear Derailleur with Adjustable Chain Stabilizer for 1x Drivetrains - Black

    The SunRace RDMS100 is a reliable 10-speed rear derailleur designed for smooth and precise shifting. Its adjustable chain stabilizer ensures optimal chain tension, enhancing overall performance and reducing chain slap. Constructed with durable alloy links, this rear mech balances strength and lightweight design at...
    £39.92
    £54.99
    £39.92
    Save £15.07
    • Black
  • SunRace RDM91 Rear Mech

    SunRace RDM91 9-Speed Rear Derailleur Long Cage Direct Mount Rear Mech - Black

    Upgrade your bike's shifting precision with the SunRace RDM91 Rear Mech. Designed for 9-speed systems, it offers smooth and reliable gear changes. The direct mount and long cage design ensure optimal chain tension and compatibility. Built for durability and performance, this rear derailleur enhances...
    £19.90
    £19.99
    £19.90
    Save £0.09
    • Black
  • SunRace RDM41 Rear Mech

    SunRace RDM41 Rear Derailleur for 7/8 Speed Bikes 11-34T Cassette Range - Black

    Enhance your bike’s shifting precision with the SunRace RDM41 Rear Mech. Designed for 7/8 speed systems, it supports an 11-34t range to handle varied terrain effortlessly. This reliable rear derailleur ensures smooth and accurate gear changes, optimizing your ride performance. Built with quality components,...
    £11.53
    £12.99
    £11.53
    Save £1.46
    • Black
  • SunRace RDM2T Rear Mech

    SunRace RDM2T Rear Derailleur for 6/7 Speed Bikes – Reliable Shifting - Black

    The SunRace RDM2T Rear Mech is designed for smooth shifting across 6/7 speed setups. Its robust construction ensures reliable performance on every ride, making it a great upgrade for your bike's transmission system. Compatible with a wide range of components, this rear derailleur delivers...
    from £5.00
    £6.99
    from £5.00
    Save £1.99
    • Black
  • MicroSHIFT R10 Rear Derailleur 10 Speed Medium Cage

    MicroSHIFT R10 10-Speed Rear Derailleur Medium Cage Compatible with Shimano Road - Black

    The MicroSHIFT R10 Rear Derailleur combines precision engineering with robust durability, featuring forged and CNC machined aluminium construction for a lightweight yet strong component. Designed for 10-speed drivetrains and compatible with Shimano road systems, it offers flexibility for custom setups. Its medium cage design...
    £43.48
    £44.99
    £43.48
    Save £1.51
    • Black
  • MicroSHIFT R8 Rear Derailleur 8 Speed Long Cage

    MicroSHIFT R8 8-Speed Long Cage Rear Derailleur for Road Bikes 7-8 Speed - Black

    The MicroSHIFT R8 Rear Derailleur combines durability and precision with its steel and composite construction, ensuring reliable performance for your bike. Designed with compact road derailleur kinematics and reinforced joints, it offers improved lateral stiffness for smooth, accurate shifting across 7 or 8 speeds....
    £24.99
    £24.99
    • Black
  • BOX MTB Box Two 9-Speed X-Wide Derailleur

    BOX MTB Box Two 9-Speed X-Wide Rear Derailleur for 11-50t Cassettes - Black

    The BOX MTB Box Two 9-Speed X-Wide Derailleur delivers reliable shifting performance tailored for aggressive trail riding. Designed to handle 11-50t cassettes, it combines durability with smooth operation, featuring sealed bushing pulleys and a Tri-Pack™ non-adjustable clutch for enhanced chain retention. This rear mech...
    £119.99
    £119.99
    • Black
  • BOX MTB Box Three 9-Speed X-Wide Derailleur

    BOX MTB Box Three 9-Speed X-Wide Rear Derailleur with Limited Slip Clutch for MTB - Black

    The BOX MTB Box Three 9-Speed X-Wide Derailleur delivers reliable performance with a focus on versatility and durability. Designed for mountain biking enthusiasts, it features a Limited Slip Clutch™ to reduce chain slap and improve chain retention. The sealed bearing pulleys enhance smooth shifting...
    £84.99
    £84.99
    • Black
  • SunRace Jockey WheelsSunRace Jockey Wheels with Sealed Bearings for Smooth Rear Derailleur Shifting

    SunRace Jockey Wheels with Sealed Bearings for Smooth Rear Derailleur Shifting - Black

    SunRace Jockey Wheels offer smooth and reliable shifting performance. Crafted with sealed bearings and durable nylon for long-lasting use. Ideal for maintaining precise rear mech operation. What It’s Good For Ensuring consistent and quiet gear changes Enhancing rear derailleur durability Reducing maintenance with sealed...
    £10.99
    £10.99
    • Black
  • SunRace SP570 Extender LinkSunRace SP570 Extender Link for Rear Derailleur Clearance & Smooth Shifting

      SunRace SP570 Extender Link for Rear Derailleur Clearance & Smooth Shifting - Black

      Enhance your bike's shifting performance with the SunRace SP570 Extender Link. This essential component increases the clearance between your rear derailleur and the largest sprockets, ensuring smooth and precise gear changes. Ideal for modern cassettes with larger bottom gears, it resolves common clearance issues...
      £11.16
      £11.99
      £11.16
      Save £0.83
      • Black
    • SunRace SP550 Derailleur bracket

        SunRace SP550 Rear Derailleur Bracket with Installation Hardware for Smooth Shifting - Black

        The SunRace SP550 derailleur bracket ensures precise gear shifting and durability. Crafted for smooth transmission, it supports reliable rear mech performance. This essential component is designed for easy installation and long-lasting use. What It’s Good For Enhancing rear derailleur stability Ensuring smooth gear transitions...
        £11.16
        £18.00
        £11.16
        Save £6.84
        • Black
      • SRAM Rear Derailleur S200 Eagle drivetrain 12 speed (mechanical) - Replaces GX, X01 & XX1

          SRAM Eagle S200 Rear Derailleur 12-Speed Mechanical for GX, X01 & XX1 Drivetrains

          The SRAM Eagle S200 rear derailleur is engineered to uphold the tradition of reliable and versatile wide-range 1x drivetrains, tailored for mountain bikers who demand consistency and durability on varied trails. As an integral part of the Eagle ecosystem, it seamlessly integrates with a...
          £110.14
          £130.00
          £110.14
          Save £19.86
        • SRAM Rear Derailleur XX Downhill T-Type AXS

            SRAM XX Downhill Rear Derailleur T-Type AXS Wireless 12-Speed MTB Component

            The SRAM Rear Derailleur XX Downhill T-Type AXS is engineered to withstand the most demanding downhill racing conditions. Designed with a robust Full-Mount, hangerless interface, this derailleur offers unparalleled impact resistance and precision shifting, ensuring reliability on the roughest tracks. Its wireless AXS technology...
            £638.75
            £680.00
            £638.75
            Save £41.25
          • SRAM Rear Derailleur S100 Eagle drivetrain 12 speed (mechanical) - Replaces SX & NX

              SRAM S100 Eagle Rear Derailleur 12-Speed Mechanical for Eagle Drivetrains Replaces SX & NX

              SRAM's Rear Derailleur S100 Eagle is the culmination of over ten years of Eagle drivetrain innovation, designed to deliver precise and reliable shifting performance for 12-speed mountain bike setups. Engineered with an updated design, this derailleur enhances durability and component fitment, ensuring smooth operation...
              £56.03
              £70.00
              £56.03
              Save £13.97
            • Shimano Deore XT RD-M8230 11-Speed Mechanical Rear Derailleur with Shadow ES TechnologyShimano Deore XT RD-M8230 11-Speed Mechanical Rear Derailleur with Shadow ES Technology

                Shimano Deore XT RD-M8230 11-Speed Mechanical Rear Derailleur with Shadow ES Technology - Black

                The Shimano Deore XT RD-M8230 rear derailleur is engineered for mountain biking enthusiasts seeking precision and durability. Featuring an 11-speed design with Shimano’s Shadow ES technology, this component ensures smooth and reliable gear shifts on the most challenging trails. Its robust construction and refined...
                £118.32
                £119.99
                £118.32
                Save £1.67
                • Black
              • Shimano Deore RD-M7230 11-Speed Mechanical Rear Derailleur with Shadow ES TechnologyShimano Deore RD-M7230 11-Speed Mechanical Rear Derailleur with Shadow ES Technology

                  Shimano Deore RD-M7230 11-Speed Mechanical Rear Derailleur with Shadow ES Technology - Black

                  The Shimano Deore RD-M7230 is a robust and reliable rear derailleur designed to elevate your mountain biking experience. Featuring an 11-speed mechanical system with Shadow ES technology, this component ensures smooth, precise gear shifts even on the most challenging trails. Its durable construction and...
                  £75.34
                  £79.99
                  £75.34
                  Save £4.65
                  • Black
                • Shimano Deore RD-M7200 12-Speed Mechanical Rear Derailleur Shadow ES MTBShimano Deore RD-M7200 12-Speed Mechanical Rear Derailleur Shadow ES MTB

                    Shimano Deore RD-M7200 12-Speed Mechanical Rear Derailleur Shadow ES MTB - Black

                    The Shimano Deore RD-M7200 rear derailleur revolutionizes your mountain biking experience with its precise 12-speed mechanical shifting system. Designed for durability and smooth performance, this Shadow ES derailleur enhances your bike’s transmission, allowing for seamless gear changes even on the most challenging trails. Its...
                    £75.34
                    £79.99
                    £75.34
                    Save £4.65
                    • Black
                  • Shimano Deore RD-M6200 12-Speed Mechanical MTB Rear Derailleur Shadow+Shimano Deore RD-M6200 12-Speed Mechanical MTB Rear Derailleur Shadow+

                      Shimano Deore RD-M6200 12-Speed Mechanical MTB Rear Derailleur Shadow+ - Black

                      The Shimano Deore RD-M6200 is a cutting-edge mechanical rear derailleur designed to elevate your mountain biking experience. Featuring a 12-speed Shadow+ system, it offers smooth, precise shifting and enhanced chain stability on rough terrains. This component is engineered for durability and reliability, making it...
                      £65.95
                      £69.99
                      £65.95
                      Save £4.04
                      • Black
                    • MicroSHIFT Marvo LT M46S 9-speed MTB rear derailleur with short cage and 11-36T capacity, bike components for mountain biking

                      MicroSHIFT Marvo LT M46S 9-Speed Rear Derailleur, Short Cage, 11-36T, MTB Compatible - Black

                      The MicroSHIFT Marvo LT M46S rear derailleur is engineered to deliver reliable, smooth shifting for mountain biking and trekking enthusiasts. Its robust full metal construction ensures exceptional durability, capable of withstanding the harshest trail conditions over time. Designed to accommodate 9-speed drivetrains, this component...
                      £24.99
                      £24.99
                      • Black
                    • MicroSHIFT Estes M200 9-speed MTB rear derailleur with Shimano cable pull, showing the black component with mounting hardware.MicroSHIFT Estes M200 9-speed rear derailleur for MTB, featuring Shimano cable pull, shown in black with mounting hardware.

                      MicroSHIFT Estes M200 9-Speed Rear Derailleur for MTB Shimano Cable Pull - Black

                      The MicroSHIFT Estes M200 9-Speed Rear Mech is designed for riders seeking dependable and precise shifting. Its robust construction with wide-set pivots and a rigid cage ensures durability and responsiveness on every ride. Featuring high-quality metric adjustment hardware, it offers straightforward setup and smooth...
                      £15.99
                      £15.99
                      • Black
                    • MicroSHIFT ADVENT 9-speed rear derailleur with medium cage for commuter and touring bikes, shown in a detailed close-up.

                      MicroSHIFT ADVENT 9-Speed Rear Derailleur Medium Cage for Commuter & Touring Bikes - Black

                      The MicroSHIFT ADVENT Rear Derailleur - 9 Speed Medium Cage offers a streamlined solution for riders who prefer smooth shifting without the added resistance of a clutch mechanism. Designed specifically for 9-speed systems, this rear mech combines reliability with ease of use, making it...
                      £48.32
                      £49.99
                      £48.32
                      Save £1.67
                      • Black
                    • MicroSHIFT Advent MX rear derailleur for 10 and 11-speed mountain bike systems, showcasing durable construction and precise shifting.

                      MicroSHIFT Advent MX Rear Derailleur for 10 & 11-Speed MTB Systems Durable Precision Shifting - Black

                      The MicroSHIFT Advent MX Rear Derailleur is engineered for riders who demand durability and precision. Designed to endure the toughest terrains, it features the most robust linkage MicroSHIFT has created, ensuring reliable shifting even in the most challenging conditions. With a beefy horizontal parallelogram...
                      £53.16
                      £54.99
                      £53.16
                      Save £1.83
                      • Black
                    • MicroSHIFT ADVENT 9-speed clutch rear derailleur for mountain bikes, showing the black Shimano-compatible component with tension arm.

                      MicroSHIFT ADVENT 9-Speed Clutch Rear Derailleur for Mountain Bikes - Black

                      The MicroSHIFT ADVENT Clutch Rear Derailleur is engineered to meet the demands of mountain bikers who seek durability and precise performance. Featuring a 9-speed configuration, this derailleur provides smooth and reliable shifting across a wide range of gears, making it ideal for tackling diverse...
                      £67.65
                      £69.99
                      £67.65
                      Save £2.34
                      • Black
                    • MicroSHIFT Acolyte SpringLock 8-speed MTB bike rear derailleur showing its compact design and mounting hardware.

                      MicroSHIFT Acolyte SpringLock Rear Derailleur 8-Speed MTB Bike Shifter Compatible - Black

                      The MicroSHIFT Acolyte SpringLock Rear Derailleur 8 Speed revolutionizes your mountain biking experience with its advanced SpringLock system. This innovative mechanism features a custom linear rate high tension spring paired with a dual stage activation, delivering exceptional chain retention on rough trails while allowing...
                      £38.66
                      £39.99
                      £38.66
                      Save £1.33
                      • Black
                    • MicroSHIFT Sword rear derailleur cable pinch bolt for smooth shifting, component bike part, close-up view of the bolt.

                      MicroSHIFT Sword Rear Derailleur Cable Pinch Bolt for Smooth Shifting

                      Upgrade your drivetrain with the MicroSHIFT Sword Rr Mech Cable Pinch Bolt. This essential component ensures secure cable fastening for smooth gear shifts. Designed for durability and precision, it perfectly complements your MicroSHIFT Sword groupset. What It’s Good For Reliable cable securing for consistent...
                      £8.99
                      £8.99
                    • Shimano Tiagra RD-R4000 11-speed rear derailleur for road bikes, showing the black component with mounting and pulley wheels.Shimano Tiagra RD-R4000 11-speed rear derailleur for road bikes, showing the black component with mounting hardware.

                      Shimano Tiagra RD-R4000 11-Speed Rear Derailleur for Road Bikes - Black

                      The Shimano Tiagra RD-R4000 11-speed rear derailleur delivers professional-grade performance at an accessible price point. Designed with a wide link structure, it enhances rigidity and extends durability, ensuring reliable shifting through countless rides. Its lightweight alloy body and outer link reduce overall weight without...
                      £64.12
                      £64.99
                      £64.12
                      Save £0.87
                      • Black
                    • Shimano GRX RD-RX717 Di2 wireless 12-speed rear derailleur with long cage, shadow finish, designed for gravel bike components.Shimano GRX RD-RX717 Di2 wireless 12-speed rear derailleur with SGS long cage and shadow finish for gravel bike components

                      Shimano GRX RD-RX717 Di2 Wireless Rear Derailleur 12-Speed SGS Long Cage Shadow ES - Black

                      The Shimano GRX RD-RX717 GRX Di2 wireless rear derailleur is engineered for the demanding world of gravel riding, combining advanced technology with rugged durability. Designed specifically for 12-speed drivetrains, it offers precise, clean wireless shifting supported by an integrated removable on-board battery (BT-DN320 sold...
                      £374.80
                      £379.99
                      £374.80
                      Save £5.19
                      • Black
                    • Placeholder image

                        Hope 16T Jockey Wheel Single for Rear Mech – Smooth Gear Shifts & Durable Performance - Blue

                        Hope Jockey Wheels 16T Single offers smooth gear shifts and reliable performance. Crafted with precision, it enhances your rear mech's efficiency for seamless transmission. Designed for durability and optimal function, this component ensures consistent tension and reduces chain wear. What It’s Good For Improving...
                        £28.83
                        £30.00
                        £28.83
                        Save £1.17
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