MTB & eMTB DRIVETRAIN
BikeCo offers the best MTB Drivetrain components from class leading manufactures.
This category contains eight subcategories to further search for what you need.
Bottom Brackets
Cassettes
Chains
Chain Guides
Chain Rings
Cranks
Rear Derailleurs
Shifters
or scroll down to shop all drivetrain!
Improve your MTB & eMTB Drivetrain Service Life in 4 Steps
Four Ways to Improve Chain, Cassette and Chain Ring Service Life
All of us want to get the most life out of our MTB components. Understanding how your MTB drivetrain wears as well as four simple ways to improve chain, cassette and chain ring service life will help you stretch your bike budget.
Chain Assembly
Your chain consists of an assembly of outer links, inner links with built in bushings, a center roller and a pin that connects it all. Repeat this over and over and you’ve got your chain.
Chain Stretch
Drivetrain wear is measured through chain “stretch”. I use quotations as it is kind of a misnomer. The chain elongates – but none of the components are really “stretching”.
As the outer diameter of the pin and the inner diameter of the bushing rotate on each other they wear in together.
The linkages in fact remain the same size. However, the interfaces wear which increases the length required to transfer power. This is responsible for the added length of a worn chain compared to a new chain.
Chain Wear & Aging
As illustrated the diverging diameters of the bushing (getting larger) and the pin (getting smaller) decrease the contact patch between them. This means the chain tends to wear faster towards the end of it’s life cycle than the beginning.
As the chain wears it increases the chain pitch, or the measurement between contact points. The chain no longer applies equal load across as many teeth on the cassette or chain ring.
With more power applied the teeth tend to become deformed.
This can take the form of “hammer formed” drive edges (the edge of the tooth that has power applied to it) which show as mushroomed areas of metal repeatedly impacted by the chain during power transfer.
Teeth may also show signs of shark toothing where metal is worn away as the chain’s power is overloading the teeth available creating deformation until the cassette or chain ring’s pitch has been altered closer to the chain. Worn front chain rings tend to hold onto the chain too long, on the bottom of the ring, which creates clicking. Worn cassettes suffer clicking and won’t hold gears properly or shift cleanly.
Once the cassette and ring start showing this type of wear for anywhere near optimum performance they should be replaced as a set.
Replacing Just a Chain, or Ring, or Cassette
This is one of the most talked about aspects of basic MTB repair. Can you just replace a chain?
Maybe. But it’s hard to catch it at that point.
There’s a few reasons it’s not easy to find that exact amount of wear when replacing just a chain will provide you the shifting quality and experience you expect. Let’s look at some.
First chains are considered completely worn at 1% stretch. It’s a pretty small amount to try to keep on top of.
Chains aren’t going to wear completely equally on all the pins.
MTB chains have dirt / sand / mud / muck ingression which expedites wear. (think of a water jet cutter – it uses sand as the cutting tool because it’s that abrasive)
Since the drivetrain’s wear rate accelerates towards the end of its service life (through contact point wear, pitch change, teeth deformantion) you have to pay more attention to it in the mid-life span prior to it beginning to wear the group.
Have I Replaced just a Chain?
Yes a couple times. But most the time the system wears in as a group and I end up replacing the cassette and chain ring as well.
The times it has worked the replaced chain was still relatively fresh. Once was a time I mauled a bunch of links on a pretty new group. The other couple times were trying to explore the ideal point to recommend a group instead of just a chain.
If the chain was relatively fresh, didn’t show really any stretch but I knew it had a lot of miles on it I had decent luck with it.
If the chain started to show wear the end results were about 50/50. If the cassette and chain ring had started to show wear the new chain would tend to click, skip and shift poorly.
At that point I would replace the cassette and chain ring before they would accelerate the wear on the new chain.
Doing the work myself, at my leisure, with a store full of parts at my disposal it wasn’t too big of an issue to try the chain and then install the new bits if the shifting wasn’t crisp.
If a bike was coming in for service we would always lean towards replacing a group to minimize both bike down time as well as a la carte service charges.
If you’re doing the work in your garage it might be worth it to have spares around in case replacing just the chain doesn’t work.
Four Ways to Increase your Drivetrains Life
Clean your Chain, Pulleys, Chain Ring & Cassette
This doesn’t have to be a pristine or spotless but a functional clean. The goal is to minimize the amount of sand, dirt, mud, muck and debris that gets under the roller or bushings and wears the contact surfaces.
I clean the chain about every ride (I would suggest every ride – but it’s kind of like flossing eh?). I use a rag and pull the debris off the exterior of the links, knock off any buildup on the chain ring and pulley teeth and then run the chain through my fingers to clean the roller and bushing interfaces.
Every now and then I’ll clean the cassette and dig out the buildup on the chain ring below the chain (shown in video with an allen wrench).
If you take a little time during cleaning to inspect your chain, chainring and cassette you may notice issues before they become huge nuisances.
Lube Your Chain
OK, if cleaning the chain is like flossing which I admit isn’t a every time thing lubing my chain is like brushing my teeth – a for sure every time deal.
Lube has two main purposes. First it provides a surface to minimize metal to metal wear and noise. Second it helps displace any debris between the pins and bushings or roller.
I use Boeshield as my day to day lube. If you follow the directions and let it sit you’ll notice it’s more effective – but, if you’re like me and are guilty of the “apply and go” it still works well.
About once a month or so I use the Dumonde Tech Classic which is a thicker lube. This is almost like a tune-up in a bottle. Just make sure to wipe the excess off or it will attract more debris in dry conditions.
Keep Your Bike Tuned
As we said earlier your cassette and chain ring wear is expedited when the amount of teeth sharing the load is decreased.
Poorly adjusted drivetrains, skipping between gears, poor B-tension setup, etc will reduce the amount of engaged teeth.
Keeping your bike tuned will extend the drivetrain’s service life and allows you a chance to review the condition of the chain, cassette and ring.
Shift Kindly!
This goes back to the “less teeth more stress” deal.
And, it doesn’t matter if you ride cable driven or wireless systems – the mechanics of how your chain swaps gears is the same. It disengages from the cog it was in and moves over.
During that disengagement and reengagement you’ve increased the load on the cassette’s teeth. If you’re climbing something steep or mashing the power during that transition you’re expediting the drivetrain group’s wear.
Wrapping It Up
So in conclusion if you keep your MTB drivetrain Clean, Lubed, Tuned and behave yourself you’ll find your budget and drivetrain will stretch further!
Shop Sale & Take-Off Drivetrain
Take a quick look at our sale and take-off Cassette, Chain, Chain Ring, Crank, Rear Derailleur and Shifter options below.
Find more Sale & Take-Off items available here.
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SRAM NX 12sp Chain
Sale!In-Stock, Ships Same or Next Business Day. Updated 02/14/25
Original price was: $28.00.$14.00Current price is: $14.00. Add to cart -
SRAM XX1 12sp Chain
Sale!In stock
$60.90 – $92.00 Select options This product has multiple variants. The options may be chosen on the product page
Search In-Stock product or check out the sub-menu links above.
Don’t see what you’re looking for?
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Cane Creek eeWings Aurora Ti Cranks
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$1,200.00 Add to cart -
Cane Creek eeWings Ti Cranks
In stock
$1,099.99 Select options This product has multiple variants. The options may be chosen on the product page -
Chris King ThreadFit 30 Bottom Bracket
Out of stock
$212.00 – $245.00 Select options This product has multiple variants. The options may be chosen on the product page -
Hope Bottom Bracket Bearings Press Fit 41mm Shell ID
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$70.00 Add to cart -
KMC X12 12sp Chain
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$40.00 Add to cart -
KMC X12 12sp Chain
Out of stock
$70.00 Read more -
MRP AMg V2 Alloy Chain Guide ISCG-05
Out of stock
$99.95 – $119.95 Select options This product has multiple variants. The options may be chosen on the product page -
OneUp Chain Guide Top Kit
In stock
$18.50 Select options This product has multiple variants. The options may be chosen on the product page -
OneUp Chain Guide V2 ISCG-05
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$59.50 Add to cart -
OneUp Chain Guide with Bash V2 ISCG-05
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$94.50 Add to cart -
OneUp Underbash ISCG-05
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$49.50 Add to cart -
Race Face Aeffect R Crank Arms 51mm Chainline
Out of stock
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Race Face NextR Crank Arm – 136mm
Out of stock
Read more -
RaceFace BB92 Bottom Bracket 30mm Cinch
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$59.99 Add to cart -
RaceFace DM 3mm Offset Chainring (Cinch)
In stock
$64.99 – $67.99 Select options This product has multiple variants. The options may be chosen on the product page -
RaceFace DM Cinch HyperGlide+ Chainring
In stock
$74.99 Select options This product has multiple variants. The options may be chosen on the product page -
RaceFace Oval Cinch Chainring
In stock
$64.99 Select options This product has multiple variants. The options may be chosen on the product page -
RaceFace PF30 Bottom Bracket 30mm Cinch
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$59.99 Add to cart -
RaceFace SRAM Direct Mount Chainring
Out of stock
$69.99 Select options This product has multiple variants. The options may be chosen on the product page -
RaceFace Threaded Bottom Bracket BSA83 30mm Cinch
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$59.99 Add to cart -
Shimano Deore M6100 12sp Chain
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$24.99 Add to cart -
Shimano Deore M6100 12sp Derailleur SGS, Long Cage
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$56.99 Add to cart -
Shimano Deore M6100 12sp I-SPEC Shifter
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$31.99 Add to cart -
Shimano Deore M6100 12sp Shifter Band Clamp
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$31.99 Add to cart -
Shimano SLX CRM75 Chainring
Out of stock
Read more -
Shimano SLX M7100 12sp Cassette 10-51t
Out of stock
$104.99 Read more -
Shimano SLX M7100 12sp Chain
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$32.99 Add to cart -
Shimano SLX M7100 12sp Derailleur SGS, Long Cage
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$78.99 Add to cart -
Shimano SLX M7100 12sp I-Spec Shifter
Out of stock
$40.99 Read more -
Shimano SLX M7100 12sp Shifter Band Clamp
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$40.99 Add to cart -
Shimano XT CRM85 Chainring
In stock
$64.99 Select options This product has multiple variants. The options may be chosen on the product page -
Shimano XT M8100 12sp Cassette 10-51t
Out of stock
$164.99 Read more -
Shimano XT M8100 12sp Chain
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$48.99 Add to cart -
Shimano XT M8100 12sp Derailleur SGS, Long Cage
Out of stock
$118.99 Read more -
Shimano XT M8100 12sp I-Spec Shifter
Out of stock
$62.99 Read more -
Shimano XT M8100 12sp Shifter Band Clamp
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$62.99 Add to cart -
Shimano XTR CRM95 Chainring
Out of stock
$139.99 Select options This product has multiple variants. The options may be chosen on the product page -
Shimano XTR M9100 12sp Cassette 10-51t
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$409.99 Add to cart -
Shimano XTR M9100 12sp Chain
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$68.99 Add to cart -
Shimano XTR M9100 12sp Derailleur GS, Med. Cage
Out of stock
$273.99 Read more -
Shimano XTR M9100 12sp Derailleur SGS, Long Cage
Out of stock
$273.99 Read more -
Shimano XTR M9100 12sp I-Spec Shifter
Out of stock
$136.99 Read more -
Shimano XTR M9100 12sp Shifter Band Clamp
Out of stock
$136.99 Read more -
SRAM AXS Battery Cover
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$20.00 Add to cart -
SRAM AXS Controller
Out of stock
$215.00 Read more -
SRAM AXS Rocker Paddle
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$20.00 Add to cart -
SRAM DUB PressFit Bottom Bracket 41mm Shell ID
Out of stock
$44.00 Read more -
SRAM DUB Threaded Bottom Bracket
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$41.00 Add to cart -
SRAM GX 12sp Cassette 10-50t, XG-1275
Out of stock
$231.00 Read more -
SRAM GX 12sp Cassette 10-52t, XG-1275
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$231.00 Add to cart -
SRAM GX 12sp Chain
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$36.00 Add to cart -
SRAM GX 12sp Derailleur 52t Max
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$135.00 Add to cart -
SRAM GX 12sp Shifter
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$49.00 Add to cart -
SRAM GX AXS Controller
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$158.00 Add to cart -
SRAM GX AXS Kit
Out of stock
$633.00 Read more -
SRAM GX Eagle Crankset 55mm Chainline
Out of stock
Read more -
SRAM NX 12sp Cassette 10-50t, PG-1230
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$108.00 Add to cart -
SRAM NX 12sp Chain
Sale!In-Stock, Ships Same or Next Business Day. Updated 02/14/25
Original price was: $28.00.$14.00Current price is: $14.00. Add to cart -
SRAM NX 12sp Derailleur
Out of stock
$107.00 Read more -
SRAM NX 12sp Shifter
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$45.00 Add to cart -
SRAM Transmission X0 104 BCD Groupset
Out of stock
$1,299.00 Read more -
SRAM Transmission X0 Bosch Groupset 160mm
Available on backorder
$1,449.00 Add to cart -
SRAM Transmission X0 Groupset 175, 170, 165mm
Out of stock
Read more -
SRAM Transmission XX 104 BCD Groupset
Available on backorder
$1,599.00 Add to cart -
SRAM Transmission XX Bosch Groupset 165mm
Available on backorder
$1,849.00 Add to cart -
SRAM Transmission XX Groupset 175, 170, 165mm
Out of stock
Read more -
SRAM Transmission XX Power Meter Groupset 175, 170, 165mm
Out of stock
Read more -
SRAM Transmission XXSL Groupset 175, 170, 165mm
Out of stock
Read more -
SRAM Transmission XXSL Power Meter Groupset 175, 170, 165mm
Out of stock
Read more -
SRAM X01 12sp Cassette 10-50t, XG-1295
Out of stock
$415.00 Read more -
SRAM X01 12sp Cassette 10-52t, XG-1295
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$415.00 Add to cart -
SRAM X01 12sp Chain
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$64.00 Add to cart -
SRAM X01 12sp Derailleur 52t Max, Eagle
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$214.00 Add to cart -
SRAM X01 12sp Shifter
Out of stock
$96.00 Read more -
SRAM X01 AXS Derailleur 52t Max, 12sp
Out of stock
$538.00 Read more -
SRAM XX1 12sp Chain
Sale!In stock
$60.90 – $92.00 Select options This product has multiple variants. The options may be chosen on the product page -
SRAM XX1 12sp Derailleur 52t Max
Out of stock
$323.00 Read more -
SRAM XX1 12sp Shifter
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$179.00 Add to cart -
SRAM XX1 AXS Derailleur 52t Max, 12sp
Out of stock
$753.00 Read more -
SRAM XX1 AXS Kit
Out of stock
$1,055.00 Read more -
SRAM XX1 AXS Rainbow 12sp Cassette 10-50t, XG-1299
Out of stock
$483.00 Read more -
SRAM XX1 Gold 12sp Cassette 10-50t, XG-1299
Out of stock
$483.00 Read more -
Wolf Tooth Gnarwolf Chain Guide ISCG-05
In-Stock, Ships Same or Next Business Day. Updated 02/14/25
$69.95 Add to cart -
Wolf Tooth Oval RaceFace Cinch 3mm Boost Chainring
In stock
$81.95 Select options This product has multiple variants. The options may be chosen on the product page -
Wolf Tooth Oval RaceFace Cinch 6mm Offset Chainring
Out of stock
$81.95 Select options This product has multiple variants. The options may be chosen on the product page -
Wolf Tooth Oval RaceFace Cinch Hyperglide + 3mm Boost Chainring
In stock
$86.95 Select options This product has multiple variants. The options may be chosen on the product page -
Wolf Tooth Oval SRAM Direct Mount Chainring
In stock
$81.95 Select options This product has multiple variants. The options may be chosen on the product page -
Wolf Tooth RaceFace Cinch 3mm Boost Chainring
In stock
$76.95 Select options This product has multiple variants. The options may be chosen on the product page -
Wolf Tooth RaceFace Cinch 6mm Offset Chainring
Out of stock
$76.95 Select options This product has multiple variants. The options may be chosen on the product page -
Wolf Tooth RaceFace Cinch Hyperglide + 3mm Boost Chainring
In stock
$76.95 Select options This product has multiple variants. The options may be chosen on the product page -
Wolf Tooth Shimano Direct Mount Oval Hyperglide +Chainring
In stock
$86.95 Select options This product has multiple variants. The options may be chosen on the product page -
Wolf Tooth Shimano DM HyperGlide + 3mm Boost Chainring
In stock
$79.95 Select options This product has multiple variants. The options may be chosen on the product page -
Wolf Tooth SRAM Direct Mount Chainring
In stock
$76.95 Select options This product has multiple variants. The options may be chosen on the product page