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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  • Shimano Spares RD-M9250 SGS outer link plate for rear derailleur replacement, showing the component's detailed metal construction.Shimano Spares RD-M9250 SGS rear derailleur outer link plate, bicycle components for gear shifting repair.

    Shimano Spares RD-M9250 SGS Outer Link Plate Unit for Rear Derailleur Replacement - Black

    The Shimano Spares RD-M9250 outer link plate unit SGS is an essential component for maintaining your bike’s smooth shifting performance. Designed as a genuine Shimano replacement part, it ensures reliable compatibility and durability. Perfect for riders who want to keep their Shimano rear mech...
    £89.78
    £94.99
    £89.78
    Save £5.21
    • Black
  • Shimano RD-M9250 GS rear derailleur outer link plate, a replacement component for Shimano bike derailleur.Shimano RD-M9250 GS rear derailleur outer link plate component for bike gear shifting, replacement part in black finish.

    Shimano RD-M9250 GS Outer Link Plate Unit Replacement Part for Rear Derailleur - Black

    Ensure smooth shifting with the Shimano Spares RD-M9250 outer link plate unit, GS. This genuine Shimano component guarantees reliable performance and durability for your rear mech. Designed for easy replacement, it keeps your transmission running efficiently, extending the life of your bike's drivetrain. What...
    £89.78
    £94.99
    £89.78
    Save £5.21
    • Black
  • Shimano RD-M9250 outer link cap replacement for rear derailleur, showing the small component in close-up detail.Shimano RD-M9250 rear derailleur outer link cap replacement, bike component spare for Shimano derailleur parts.

    Shimano RD-M9250 Outer Link Cap Replacement for Rear Derailleur Spares - Black

    Ensure smooth shifting with this genuine Shimano Spares RD-M9250 outer link cap. Designed to fit perfectly, it maintains your rear mech's performance and reliability. Made with durable materials, this component extends the life of your transmission system and guarantees optimal gear changes every ride....
    £5.65
    £5.99
    £5.65
    Save £0.34
    • Black
  • Shimano RD-M9250 outer link bumper unit replacement for rear derailleur, component part for Shimano bicycle gear systems.Shimano RD-M9250 outer link bumper unit for rear derailleur replacement, showing the component's detailed design.

    Shimano RD-M9250 Outer Link Bumper Unit Replacement for Rear Derailleur - Black

    The Shimano Spares RD-M9250 outer link bumper unit ensures smooth shifting performance by protecting your rear mech. Crafted for durability, it seamlessly fits Shimano systems, maintaining optimal transmission function. What It’s Good For Reliable replacement for worn or damaged parts Maintains smooth and precise...
    £18.89
    £19.99
    £18.89
    Save £1.10
    • Black
  • Shimano Spares RD-M9250 rear derailleur name plate replacement for Shimano mountain bike rear mech system.Shimano Spares RD-M9250 rear derailleur name plate replacement for Shimano rear mech system, showing a close-up of the component.

    Shimano Spares RD-M9250 Name Plate Replacement for Rear Mech System - Black

    Upgrade your bike with the genuine Shimano Spares RD-M9250 name plate. This replacement component ensures perfect fit and reliable performance for your rear mech system. Designed for durability and precision, it maintains optimal transmission function and extends the life of your bike’s drivetrain. What...
    £17.95
    £18.99
    £17.95
    Save £1.04
    • Black
  • Shimano Spares RD-M9250 rear derailleur mounting screw, replacement component for bike gear shifting system.Shimano RD-M9250 rear derailleur mounting screw, genuine spare component for bike gear systems, shown in close-up image.

    Shimano Genuine RD-M9250 Rear Mech Mounting Screw Unit Replacement Part - Black

    The Shimano Spares RD-M9250 mounting screw unit ensures a secure fit for your rear mech. Crafted as a genuine replacement part, it guarantees compatibility and durability for smooth bike performance. Designed specifically for Shimano transmissions, this component is essential for maintaining your bike’s shifting...
    £26.45
    £27.99
    £26.45
    Save £1.54
    • Black
  • Shimano RD-M9250 SGS rear derailleur inner plate replacement component for bike gear shifting.Shimano RD-M9250 SGS rear derailleur inner plate replacement component for mountain bike gear shifting.

    Shimano RD-M9250 SGS Rear Derailleur Inner Plate Replacement Spare Part - Black

    The Shimano Spares RD-M9250 inner plate, SGS is a genuine replacement component designed to maintain optimal performance of your rear mech. Crafted with precision, it ensures seamless gear shifting and durability for your bike's transmission system. Perfect for riders who want to keep their...
    £25.52
    £26.99
    £25.52
    Save £1.47
    • Black
  • Shimano RD-M9250 GS rear derailleur inner plate replacement spare part for bike components.Shimano RD-M9250 GS rear derailleur inner plate replacement part for bike components, shown in the image.

    Shimano RD-M9250 GS Rear Derailleur Inner Plate Replacement Spare Part - Black

    Ensure smooth shifting with the genuine Shimano Spares RD-M9250 inner plate. Designed for reliable performance, it maintains your rear mech's precision and durability. What It’s Good For Replacing worn or damaged rear mech parts Maintaining smooth gear transitions Extending the lifespan of your transmission...
    £25.52
    £26.99
    £25.52
    Save £1.47
    • Black
  • Shimano Spares RD-M9250 derailleur end adjust screw and plate for precise gear tuning, component for bicycle derailleur maintenance.Shimano Spares RD-M9250 derailleur end adjust screw and plate for precise tuning, shown in close-up image.

    Shimano Spares RD-M9250 End Adjust Screw and Plate for Precise Derailleur Tuning - Black

    Ensure precise derailleur tuning with the Shimano Spares RD-M9250 end adjust screw and plate. This genuine component guarantees reliable performance and durability for your transmission system. Easy to install and designed to fit perfectly, it helps maintain smooth gear shifts and extends the lifespan...
    £9.44
    £9.99
    £9.44
    Save £0.55
    • Black
  • Shimano RD-M9250 rear derailleur cable cover and fixing screw, spare parts for bike components, shown in the image.Shimano RD-M9250 rear derailleur cable cover and fixing screw spare parts, close-up of metal components on white background.

    Shimano RD-M9250 Rear Mech Cable Cover and Fixing Screw Spare Parts - Black

    Ensure smooth shifting with this genuine Shimano cable cover and fixing screw. Designed specifically for the RD-M9250 rear mech, these components guarantee reliable performance and durability. Made to seamlessly fit and protect your transmission system, these spares keep your bike running efficiently. Perfect for...
    £8.51
    £8.99
    £8.51
    Save £0.48
    • Black
  • Shimano RD-M9100 P-Tension spring replacement part for rear derailleur, shown in exploded view of components.Shimano RD-M9100 P-Tension spring replacement part for rear derailleur, close-up of the small metal spring component.

    Shimano RD-M9100 P-Tension Spring Replacement Part for Rear Derailleur - Silver

    The Shimano Spares RD-M9100 P-tension spring ensures precise tension for smooth rear mech performance. This genuine component guarantees reliable transmission operation. Designed specifically for Shimano's RD-M9100, it provides durability and consistent shifting, making it an essential part for maintaining your bike's drivetrain. What It’s...
    £2.82
    £2.99
    £2.82
    Save £0.17
    • Silver
  • Shimano Spares RD-M8260-11L pulley set for rear derailleur, includes multiple pulleys for replacement and maintenance.Shimano Spares RD-M8260-11L rear derailleur pulley set with metal and plastic components for bike gear maintenance.

    Shimano Spares RD-M8260-11L Pulley Set for Rear Mech Replacement and Maintenance - Black

    Upgrade your bike's performance with the Shimano Spares RD-M8260-11L pulley set. Designed as genuine replacement parts, these jockey wheels ensure smooth and efficient gear shifting. Crafted for durability and precision, they maintain optimal transmission function for your rear mech. What It’s Good For Ensuring...
    £20.25
    £24.99
    £20.25
    Save £4.74
    • Black
  • Shimano RD-M8250-SGS rear derailleur plate assembly for bike components, genuine Shimano spare parts.Shimano RD-M8250-SGS rear derailleur plate assembly showing metal components for bicycle gear shifting replacement part

    Shimano RD-M8250-SGS Rear Derailleur Plate Assembly Genuine Replacement Part - Black

    Shimano Spares RD-M8250-SGS plate assembly ensures smooth shifting. Designed as a genuine replacement, it maintains your bike's performance and reliability. Perfect for keeping your rear mech in top condition with authentic Shimano quality. What It’s Good For Restoring precise rear derailleur function Maintaining Shimano...
    £75.61
    £79.99
    £75.61
    Save £4.38
    • Black
  • Shimano Spares RD-M8250 rear derailleur pulley set for smooth shifting on mountain bikes, showing detailed components.Shimano Spares RD-M8250 rear derailleur pulley set with durable black plastic and metal components for smooth shifting on mountain bikes.

    Shimano Spares RD-M8250 Rear Derailleur Pulley Set for Smooth Shifting - Black

    Upgrade your bike’s drivetrain with the Shimano Spares RD-M8250 pulley set. Designed for smooth shifting and optimal performance, these genuine Shimano jockey wheels ensure durability and precision. Crafted specifically for rear mech transmissions, this pulley set helps maintain efficient chain movement and reduces wear....
    £20.25
    £24.99
    £20.25
    Save £4.74
    • Black
  • Shimano Spares RD-M8250 plate axle and cap replacement for rear derailleur component, shown in close-up image.Shimano Spares RD-M8250 rear derailleur plate axle and cap replacement component for bike drivetrain.

    Shimano Spares RD-M8250 Plate Axle and Cap Replacement for Rear Derailleur - Black

    Maintain your bike's optimal performance with the Shimano Spares RD-M8250 plate axle and cap. Designed as a genuine replacement, this component ensures a perfect fit and reliable function for your rear mech. Crafted for durability, it helps keep your transmission running smoothly. Easy to...
    £40.63
    £42.99
    £40.63
    Save £2.36
    • Black
  • Shimano RD-M8250 SGS rear derailleur outer plate, bike component replacement part, with detailed metal construction and mounting points.Shimano RD-M8250 SGS rear derailleur outer plate replacement part for mountain bike components, with metal construction and branding.

    Shimano RD-M8250 SGS Rear Derailleur Outer Plate Unit Replacement Part - Black

    Upgrade your bike's performance with the Shimano Spares RD-M8250 outer plate unit. This genuine replacement part ensures smooth and reliable gear shifting for your rear derailleur. Crafted by Shimano, it matches the high standards of your original components, maintaining optimal transmission efficiency. Designed specifically...
    £28.35
    £29.99
    £28.35
    Save £1.64
    • Black
  • Shimano Spares RD-M8250 GS rear derailleur outer plate unit for replacement on bike rear mechs.Shimano Spares RD-M8250 GS outer plate unit for rear derailleur, showing the replacement component with metal and plastic parts.

    Shimano Spares RD-M8250 GS Outer Plate Unit Replacement for Rear Mech - Black

    Upgrade your bike with the Shimano Spares RD-M8250 outer plate unit, GS. This genuine Shimano component ensures reliable performance and smooth shifting for your rear mech. Crafted for durability, it seamlessly fits your transmission system, keeping your ride efficient and responsive. Designed specifically as...
    £28.35
    £29.99
    £28.35
    Save £1.64
    • Black
  • Shimano Spares RD-M8250 rear derailleur mounting screw for bike component replacement, shown close-up of the small metal screw.Shimano Spares RD-M8250 rear derailleur mounting screw, replacement component for bike derailleur assembly.

    Shimano Spares RD-M8250 Rear Derailleur Mounting Screw Unit Replacement Part - Black

    Ensure smooth gear shifts with the Shimano Spares RD-M8250 mounting screw unit. This genuine replacement part guarantees reliable performance and perfect fit for your rear mech. What It’s Good For Maintaining optimal rear derailleur alignment Extending the life of your transmission system Easy and...
    £31.19
    £32.99
    £31.19
    Save £1.80
    • Black
  • Shimano RD-M8250-GS rear derailleur mech plate assembly for bike drivetrain, genuine Shimano spare component.Shimano RD-M8250-GS rear derailleur mech plate assembly, genuine replacement component with metal and plastic parts.

    Shimano RD-M8250-GS Rear Mech Plate Assembly Genuine Replacement Part - Black

    Ensure smooth gear shifts with the Shimano Spares RD-M8250-GS plate assembly. This genuine replacement part is designed to fit perfectly and restore optimal performance to your rear mech. Crafted with precision, it guarantees durability and reliable transmission function, keeping your ride efficient and enjoyable....
    £75.61
    £79.99
    £75.61
    Save £4.38
    • Black
  • Shimano RD-M8250 genuine battery holder replacement for rear derailleur, component spare part for Shimano bike gear systems.Shimano RD-M8250 genuine battery holder replacement for rear derailleur components, shown in the product image.

    Shimano RD-M8250 Genuine Battery Holder Replacement for Rear Mech Spares - Black

    Ensure your Shimano rear mech stays powered with this genuine battery holder. Designed for durability and perfect fit, it keeps your transmission running smoothly. What It’s Good For Reliable power supply for Shimano RD-M8250 rear mech Easy installation and secure fit Maintains optimal transmission...
    £37.79
    £39.99
    £37.79
    Save £2.20
    • Black
  • Shimano Spares RD-M6250-SGS rear derailleur outer plate assembly showing metal components for smooth shifting on a bicycle.Shimano Spares RD-M6250-SGS rear derailleur outer plate assembly for smooth shifting, showing detailed metal components.

    Shimano Spares RD-M6250-SGS Rear Derailleur Outer Plate Assembly for Smooth Shifting - Black

    Upgrade your bike with the genuine Shimano Spares RD-M6250-SGS outer plate assembly. Designed for durability and precise shifting, this component ensures smooth rear mech performance. Easy to install and built to last, it maintains the integrity of your bike's transmission system for optimal riding...
    £21.72
    £22.99
    £21.72
    Save £1.27
    • Black
  • Shimano RD-M6250-SGS inner plate replacement part for rear derailleur, showing metal component for smooth shifting.Shimano RD-M6250-SGS rear derailleur inner plate replacement part for smooth shifting, shown in close-up image.

    Shimano RD-M6250-SGS Inner Plate Replacement Part for Rear Mech Smooth Shifting - Black

    Ensure smooth shifting with the genuine Shimano RD-M6250-SGS inner plate. Designed for reliable performance and durability, this replacement part keeps your rear mech functioning perfectly. What It’s Good For Maintaining optimal transmission performance Extending the lifespan of your rear mech Easy installation with genuine...
    £12.28
    £12.99
    £12.28
    Save £0.71
    • Black
  • Shimano CUES RD-U8050 Di2 10-speed wired rear derailleur with SGS long cage and shadow design, for high-performance road biking components.Shimano CUES RD-U8050 Di2 wired rear derailleur for 10-speed bikes, SGS long cage, shadow design, component bike part

    Shimano CUES RD-U8050 Di2 Wired Rear Derailleur 10-Speed SGS Long Cage Shadow Design - Black

    The Shimano CUES RD-U8050 CUES Di2 wired rear derailleur offers precision and reliability for serious MTB riders. Featuring Digital Integrated Intelligence (Di2), it provides programmed automatic shifting that feels effortless and smooth, enhancing your drivetrain efficiency in all conditions. Its Shadow design ensures a...
    £201.85
    £219.99
    £201.85
    Save £18.14
    • Black
  • Shimano CUES RD-U8020 tension and guide pulley set for rear derailleur, components for bike gear shifting replacement.Shimano CUES RD-U8020 tension and guide pulley set for rear derailleur, showing components with pulley wheels and mounting hardware.

    Shimano CUES RD-U8020 Tension & Guide Pulley Set for Rear Mech Replacement - Black

    Upgrade your bike's shifting performance with the Shimano CUES RD-U8020 tension and guide pulley set. This genuine Shimano component ensures smooth and precise gear transitions, enhancing your ride quality. Designed for durability and optimal function, it perfectly fits your rear mech to maintain reliable...
    £10.53
    £12.99
    £10.53
    Save £2.46
    • Black
  • Shimano CUES RD-U8000 CUES rear derailleur, GS medium cage, 11-speed, Shadow+Shimano CUES RD-U8000 CUES rear derailleur, GS medium cage, 11-speed, Shadow+

    Shimano CUES RD-U8000 11-Speed Rear Derailleur GS Medium Cage Shadow+ for MTB & E-Bike - Black

    The Shimano CUES RD-U8000 rear derailleur is engineered to elevate your mid-grade mountain biking experience with superior durability and smooth shifting performance. Featuring the innovative LINKGLIDE technology, this component offers up to 300% greater durability compared to traditional Hyperglide drivetrains, ensuring your ride stays...
    £82.62
    £89.99
    £82.62
    Save £7.37
    • Black
  • CeramicSpeed OSPWX System SRAM Eagle Mechanical Pulley WheelsCeramicSpeed OSPWX System SRAM Eagle Mechanical Pulley Wheels

      CeramicSpeed OSPWX SRAM Eagle Mechanical Pulley Wheels System for Drivetrain Efficiency - Orange

      Elevate your drivetrain performance with the CeramicSpeed OSPWX System SRAM Eagle Mechanical Pulley Wheels, meticulously engineered for serious cyclists seeking precision and durability. Featuring a unique narrow wide tooth profile, these pulley wheels ensure exceptional chain retention, minimizing the risk of chain drops even...
      from £207.89
      £439.99
      from £207.89
      Save £232.10
      • Black
      • Gold
      • Orange
    • CeramicSpeed OSPW X for Shimano GRX RX-820 2x12CeramicSpeed OSPW X for Shimano GRX RX-820 2x12

        CeramicSpeed OSPW X Pulley Wheel System for Shimano GRX RX-820 2x12 Drivetrain - Black

        The CeramicSpeed OSPW X for Shimano GRX RX-820 2x12 is a high-performance component system designed specifically for gravel and cyclocross disciplines. Proven in demanding races like Paris-Roubaix and Strade Bianche, this pulley wheel system enhances your drivetrain with exceptional durability and significantly reduced friction....
        from £373.99
        £439.99
        from £373.99
        Save £66.00
        • Black
        • Red
        • Gold
        • Blue
      • CeramicSpeed OSPW RS Alpha Disc SRAM Red/Force AXS Pulley Wheels Team EditionCeramicSpeed OSPW RS Alpha Disc SRAM Red/Force AXS Pulley Wheels Team Edition

          CeramicSpeed OSPW RS Alpha Disc Pulley Wheels for SRAM Red/Force AXS Team Edition - Silver TEAM

          The CeramicSpeed OSPW RS Alpha Disc SRAM Red/Force AXS Pulley Wheels Team Edition represents the pinnacle of transmission innovation for SRAM Road groupsets. Its modern, angular design not only complements contemporary bike aesthetics but also enhances the overall performance of your drivetrain. Crafted with...
          from £441.99
          £519.99
          from £441.99
          Save £78.00
          • Black TEAM
          • Silver TEAM
        • CeramicSpeed OSPW RS Alpha Disc for Campag SR Wireless Pulley Wheels Team EditionCeramicSpeed OSPW RS Alpha Disc for Campag SR Wireless Pulley Wheels Team Edition

            CeramicSpeed OSPW RS Alpha Disc Pulley Wheels Team Edition for Campag SR Wireless - Black TEAM

            Experience unparalleled precision and durability with the CeramicSpeed OSPW RS Alpha Disc for Campag SR Wireless Pulley Wheels Team Edition. Designed specifically for Campagnolo’s 12-speed Super Record Wireless groupset, this system combines cutting-edge technology with the timeless elegance of Italian cycling heritage. The ALPHA...
            £491.39
            £519.99
            £491.39
            Save £28.60
            • Black TEAM
            • Silver TEAM
          • CeramicSpeed OSPW RS 3D Printed Hollow Titanium Coated Bearings SRAM Red/Force AXS Pulley WheelsCeramicSpeed OSPW RS 3D Printed Hollow Titanium Coated Bearings SRAM Red/Force AXS Pulley Wheels

              CeramicSpeed OSPW RS 3D Printed Hollow Titanium Coated Bearings SRAM Red Force AXS Pulley Wheels - Black

              Discover the next evolution in drivetrain performance with the CeramicSpeed OSPW RS 3D Printed Hollow Titanium Coated Bearings designed specifically for SRAM Red and Force AXS groupsets. This modern iteration of the OSPW system embraces a sleek, angular design that not only enhances the...
              from £1,538.49
              £1,809.99
              from £1,538.49
              Save £271.50
              • Black
              • Oil Slick
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