MTB Drivetrain & Gear Parts

MTB drivetrains are critical to smooth performance. But, similarly to other bike parts, they can get damaged over time. To keep your bike in safe working order, browse our mountain bike drivetrain parts. Top brands on sale include Shimano and in-house made Decathlon parts.
307 items
SHIMANO 11-Speed Road/Mountain Bike Chain Shimano 105 CN-HG601 116L Quick Link
SHIMANO 11-Speed Road/Mountain Bike Chain Shimano 105 CN-HG601 116L Quick Link
Rate: 4.6 stars, 318 votes
£25.99
DECATHLON 3- to 8-Speed Bike Chain
DECATHLON 3- to 8-Speed Bike Chain
Rate: 4.5 stars, 1409 votes
£9.99
Was £11.99
DECATHLON 12X32 8-Speed Cassette
DECATHLON 12X32 8-Speed Cassette
Rate: 4.4 stars, 748 votes
£12.99
Was £17.99
DECATHLON 11-Speed Bike Chain
DECATHLON 11-Speed Bike Chain
Rate: 4.4 stars, 297 votes
£17.99
DECATHLON 9-Speed Bike Chain
DECATHLON 9-Speed Bike Chain
Rate: 4.2 stars, 594 votes
£14.99
DECATHLON 9-Speed Derailleur Shifters
DECATHLON 9-Speed Derailleur Shifters
Rate: 4.0 stars, 116 votes
£13.99
Was £15.99
SHIMANO HG53 Tiagra / Deore 9S Chain
SHIMANO HG53 Tiagra / Deore 9S Chain
Rate: 4.4 stars, 288 votes
£17.99
DECATHLON 11-Speed Quick Release Links - Twin-Pack
DECATHLON 11-Speed Quick Release Links - Twin-Pack
Rate: 4.6 stars, 308 votes
£8.99
Was £9.99
DECATHLON 6-Speed Grip Shifter
DECATHLON 6-Speed Grip Shifter
Rate: 4.3 stars, 431 votes
£8.99
Was £9.99
SRAM SRAM 9 Speed Bike Chain PC951 114 links
SRAM SRAM 9 Speed Bike Chain PC951 114 links
£17.99
KMC KMC 5-8 Speed Bike Chain Z8 7.3mm 114 links
KMC KMC 5-8 Speed Bike Chain Z8 7.3mm 114 links
Rate: 4.2 stars, 73 votes
£9.99
DECATHLON 9-Speed 11x32 Bike Cassette
DECATHLON 9-Speed 11x32 Bike Cassette
Rate: 4.5 stars, 332 votes
£15.99
Was £19.99
DECATHLON 3-Speed Left Grip Shifter
DECATHLON 3-Speed Left Grip Shifter
Rate: 4.3 stars, 472 votes
£8.99
SHIMANO Deore HG54 10-Speed Chain
SHIMANO Deore HG54 10-Speed Chain
Rate: 4.3 stars, 298 votes
£17.99
DECATHLON 7-Speed Derailleur Shifter
DECATHLON 7-Speed Derailleur Shifter
Rate: 4.3 stars, 289 votes
£10.99
Was £11.99
DECATHLON 3-Speed Derailleur Shifter
DECATHLON 3-Speed Derailleur Shifter
Rate: 4.2 stars, 290 votes
£10.99
SHIMANO 7/8-Speed Rear Derailleur Acera M3020
SHIMANO 7/8-Speed Rear Derailleur Acera M3020
Rate: 4.3 stars, 3 votes
£27.99
DECATHLON 8-Speed Derailleur Shifter
DECATHLON 8-Speed Derailleur Shifter
Rate: 4.0 stars, 135 votes
£12.99
Was £14.99
SHIMANO Triple Chainset Altus FC-MT101 3x9S
SHIMANO Triple Chainset Altus FC-MT101 3x9S
Rate: 4.8 stars, 14 votes
£34.99
DECATHLON Quick Release Links for 9-Speed Chain - Twin-Pack
DECATHLON Quick Release Links for 9-Speed Chain - Twin-Pack
Rate: 4.5 stars, 484 votes
£6.99
Was £7.99
DECATHLON 1-Speed Bike Chain
DECATHLON 1-Speed Bike Chain
Rate: 4.3 stars, 316 votes
£9.99
SRAM SRAM 10 Speed Bike Chain PC1031 114 links
SRAM SRAM 10 Speed Bike Chain PC1031 114 links
£19.99
SHIMANO CS-HG400 9-Speed 11x32 Cassette Alivio
SHIMANO CS-HG400 9-Speed 11x32 Cassette Alivio
Rate: 4.6 stars, 164 votes
£19.99
SHIMANO 12-Speed Chain CN-M6100
SHIMANO 12-Speed Chain CN-M6100
Rate: 4.5 stars, 18 votes
£20.99
DECATHLON Rear Derailleur Guard
DECATHLON Rear Derailleur Guard
Rate: 4.2 stars, 247 votes
£3.99
SRAM 11-Speed Bike Chain SRAM PC1110
SRAM 11-Speed Bike Chain SRAM PC1110
Rate: 4.5 stars, 213 votes
£14.99
SRAM SRAM 7-8 Speed Bike Chain PC850 114 links
SRAM SRAM 7-8 Speed Bike Chain PC850 114 links
£14.99
DECATHLON 3- to 8-Speed Quick Release Chain Links - Pack of
DECATHLON 3- to 8-Speed Quick Release Chain Links - Pack of
Rate: 4.6 stars, 871 votes
£5.99
Was £6.99
DECATHLON Universal Derailleur Cable - Stainless Steel
DECATHLON Universal Derailleur Cable - Stainless Steel
Rate: 4.7 stars, 1019 votes
£3.99
DECATHLON Quick Release Links for 10-speed Chain x2
DECATHLON Quick Release Links for 10-speed Chain x2
Rate: 4.4 stars, 620 votes
£7.99
Was £8.99
DECATHLON Derailleur Dropout Replacement
DECATHLON Derailleur Dropout Replacement
Rate: 4.1 stars, 135 votes
£4.99
SHIMANO Rear Derailleur 6/7-Speed Shimano Tourney TY300
SHIMANO Rear Derailleur 6/7-Speed Shimano Tourney TY300
Rate: 4.7 stars, 174 votes
£11.99
DECATHLON Triple Chainwheel Front Derailleur
DECATHLON Triple Chainwheel Front Derailleur
Rate: 4.3 stars, 385 votes
£14.99
DECATHLON 5-Speed 14x28 Screw-On Freewheel
DECATHLON 5-Speed 14x28 Screw-On Freewheel
Rate: 4.2 stars, 95 votes
£12.99
SHIMANO 9-Speed Rear Derailleur Alivio M3100
SHIMANO 9-Speed Rear Derailleur Alivio M3100
Rate: 4.5 stars, 59 votes
£31.49£42.99
SRAM 12-Speed Chain SRAM NX Eagle and Quick Release
SRAM 12-Speed Chain SRAM NX Eagle and Quick Release
Rate: 4.8 stars, 82 votes
£22.99
KMC KMC 12 Speed Bike Chain X12 126 links
KMC KMC 12 Speed Bike Chain X12 126 links
£32.99
SRAM X4 7- to 9-Speed Rear Derailleur
SRAM X4 7- to 9-Speed Rear Derailleur
Rate: 3.9 stars, 251 votes
£19.99
ELOPS 133 mm Topaz Square Taper Bottom Bracket
ELOPS 133 mm Topaz Square Taper Bottom Bracket
Rate: 2.5 stars, 2 votes
£7.99
DECATHLON 7 SPEED 12x28 CASSETTE
DECATHLON 7 SPEED 12x28 CASSETTE
Rate: 4.4 stars, 291 votes
£14.99
Was £15.99
4.3/5 based on 17846 reviews collected online and in stores

MTB DRIVETRAIN PARTS

Without a drivetrain, your mountain bike won’t be going anywhere. If it becomes damaged by time, weathering or an accident, you’ll want to replace the damaged components to prevent other elements breaking, ensuring your MTB stays safe and usable. Decathlon has a full range of MTB drivetrain parts – high quality at affordable prices.

Be sure to look after your drivetrain by cleaning it after rides – particularly wet and muddy ones. Grit, dirt and water can damage the drivetrain in a variety of ways and shorten its lifespan, so keeping it clean is a good idea.

You may want to upgrade your drivetrain in order to increase the number of gears your mountain bike can switch between or change to a one by system. If that’s the case, explore our range of MTB cassettes and gear shifters. If you need other bits and pieces, check out our mountain bike accessories, mountain bike partsandmountain bike maintenance equipmentsections. And for your stopping needs, it’s all about ourmountain bike brakes page.