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.
308 items
DECATHLON 3- to 8-Speed Bike Chain
DECATHLON 3- to 8-Speed Bike Chain
Rate: 4.5 stars, 1429 votes
£9.99
Was £11.99
DECATHLON 10-Speed Bike Chain
DECATHLON 10-Speed Bike Chain
Rate: 4.5 stars, 397 votes
£14.99
Was £15.99
DECATHLON 3-Speed Left Grip Shifter
DECATHLON 3-Speed Left Grip Shifter
Rate: 4.3 stars, 475 votes
£8.99
DECATHLON 9-Speed Bike Chain
DECATHLON 9-Speed Bike Chain
Rate: 4.2 stars, 610 votes
£14.99
DECATHLON 1-Speed Bike Chain
DECATHLON 1-Speed Bike Chain
Rate: 4.3 stars, 318 votes
£9.99
DECATHLON 11-Speed Quick Release Links - Twin-Pack
DECATHLON 11-Speed Quick Release Links - Twin-Pack
Rate: 4.6 stars, 313 votes
£8.99
Was £9.99
DECATHLON Universal Derailleur Cable - Stainless Steel
DECATHLON Universal Derailleur Cable - Stainless Steel
Rate: 4.7 stars, 1035 votes
£3.99
KMC KMC 9 Speed Bike Chain X9 114 links
KMC KMC 9 Speed Bike Chain X9 114 links
Rate: 4.2 stars, 45 votes
£17.99
KMC KMC 12 Speed Bike Chain X12 126 links
KMC KMC 12 Speed Bike Chain X12 126 links
£32.99
KMC KMC 10 Speed Bike Chain X10 114 links
KMC KMC 10 Speed Bike Chain X10 114 links
£23.99
DECATHLON 3-Speed Derailleur Shifter
DECATHLON 3-Speed Derailleur Shifter
Rate: 4.2 stars, 292 votes
£10.99
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 11-Speed Bike Chain
DECATHLON 11-Speed Bike Chain
Rate: 4.4 stars, 305 votes
£17.99
KMC KMC 11 Speed Bike Chain X11 114 links
KMC KMC 11 Speed Bike Chain X11 114 links
£32.99
DECATHLON 12X32 8-Speed Cassette
DECATHLON 12X32 8-Speed Cassette
Rate: 4.4 stars, 755 votes
£12.99
Was £17.99
DECATHLON Derailleur Cable and Housing Kit
DECATHLON Derailleur Cable and Housing Kit
Rate: 4.5 stars, 527 votes
£9.99
Was £12.99
DECATHLON 9-Speed Derailleur Shifters
DECATHLON 9-Speed Derailleur Shifters
Rate: 4.0 stars, 116 votes
£13.99
Was £15.99
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
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, 325 votes
£25.99
DECATHLON 8-Speed Derailleur Shifter
DECATHLON 8-Speed Derailleur Shifter
Rate: 4.0 stars, 136 votes
£12.99
Was £14.99
DECATHLON 9-Speed 11x32 Bike Cassette
DECATHLON 9-Speed 11x32 Bike Cassette
Rate: 4.5 stars, 338 votes
£15.99
Was £19.99
SHIMANO Triple Chainset Altus FC-MT101 3x9S
SHIMANO Triple Chainset Altus FC-MT101 3x9S
Rate: 4.8 stars, 14 votes
£34.99
DECATHLON 7-Speed Derailleur Shifter
DECATHLON 7-Speed Derailleur Shifter
Rate: 4.3 stars, 289 votes
£10.99
Was £11.99
DECATHLON Bike Derailleur Housing Cable Outer - Black
DECATHLON Bike Derailleur Housing Cable Outer - Black
Rate: 4.5 stars, 977 votes
£4.99
£2.50/m
DECATHLON Cycling Left Crank Arm 175 mm
DECATHLON Cycling Left Crank Arm 175 mm
Rate: 4.8 stars, 6 votes
£13.99
DECATHLON Derailleur Dropout Replacement
DECATHLON Derailleur Dropout Replacement
Rate: 4.1 stars, 135 votes
£4.99
SHIMANO HG53 Tiagra / Deore 9S Chain
SHIMANO HG53 Tiagra / Deore 9S Chain
Rate: 4.4 stars, 296 votes
£17.99
SRAM SRAM 10 Speed Bike Chain PC1031 114 links
SRAM SRAM 10 Speed Bike Chain PC1031 114 links
£19.99
SHIMANO 7/8-Speed Rear Derailleur Acera M3020
SHIMANO 7/8-Speed Rear Derailleur Acera M3020
Rate: 4.6 stars, 5 votes
£27.99
SRAM SRAM 11 Speed Bike Chain PC1130 114 links
SRAM SRAM 11 Speed Bike Chain PC1130 114 links
£21.99
DECATHLON Rear Derailleur Guard
DECATHLON Rear Derailleur Guard
Rate: 4.2 stars, 248 votes
£3.99
DECATHLON Triple Chainwheel Front Derailleur
DECATHLON Triple Chainwheel Front Derailleur
Rate: 4.3 stars, 387 votes
£14.99
KMC KMC Single Speed Bike Chain B1 Narrow Silver 112 links
KMC KMC Single Speed Bike Chain B1 Narrow Silver 112 links
£6.99
SRAM SRAM 9 Speed Bike Chain PC951 114 links
SRAM SRAM 9 Speed Bike Chain PC951 114 links
£17.99
DECATHLON 7-SPEED GRIP SHIFTER
DECATHLON 7-SPEED GRIP SHIFTER
Rate: 4.4 stars, 411 votes
£8.99
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, 877 votes
£5.99
SRAM SRAM 7-8 Speed Bike Chain PC850 114 links
SRAM SRAM 7-8 Speed Bike Chain PC850 114 links
£14.99
DECATHLON Bike Triple Bottom Bracket - 7, 8, and 9 Speeds
DECATHLON Bike Triple Bottom Bracket - 7, 8, and 9 Speeds
Rate: 4.1 stars, 427 votes
£29.99
DECATHLON 6-Speed 14x28 Screw-On Freewheel
DECATHLON 6-Speed 14x28 Screw-On Freewheel
Rate: 4.2 stars, 274 votes
£14.99
DECATHLON Quick Release Links for 1-speed Bike Chain x 2
DECATHLON Quick Release Links for 1-speed Bike Chain x 2
Rate: 4.3 stars, 167 votes
£5.99
4.4/5 based on 19013 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.