MTB Drivetrain Replacement Kits

MTB Drivetrain Replacement Kits

BikeCo’s MTB Drivetrain Replacement Kits allow you to spec the perfect Chainring, Chain and Cassette for your riding.


Choose your rear hub driver and applicable cassettes will display. Then choose your crank type for chainrings.


Questions? Feel free to chat, email or call and we will help you pick the best SRAM, Shimano, RaceFace and Wolf Tooth drivetrain components.

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Using’s MTB Drivetrain Replacement Kits you quickly order all the right parts.

Whether you ride 12sp Eagle or Shimano we have you covered.

For the HG Driver we offer the NX PG-1230 Cassette.

XD Driver cassettes include the GX PG-1275, X01 PG-1295, X01 AXS PG-1295, XX1 Gold PG-1299 as well as XX1 AXS Rainbow PG 1299 options.

For the new 12sp Shimano MicroSpline driver choose from SLX CS-M7100, XT CS-M8100 or XTR CS-9100. Shimano cassettes are available in 10-45t or 10-51t options. 10-51t cassettes require a long cage rear derailleur.

Chainrings are available for SRAM Direct Mount (3-bolt), RaceFace Cinch as well as Shimano Direct Mount. BikeCo offers the best selection of the best chainrings. Whether you’re looking for cost-conscious steel options, great for trying new chainring sizes, all the way to the top tier offerings. SRAM, Shimano, RaceFace and Wolf Tooth options available.

Chains for both the new 12sp Shimano HyperGlide + standard as well as 12sp SRAM Eagle are available.

Learn More

Check out more details on the individual components on


Tips & Tricks

Remember, when it’s time to replace a worn out drivetrain you should change the Cassette, Chain and Chainring. If you have a lot of miles, or even less, but hard miles on the group they’ve worn in together. Simply replacing a chain on a worn cassette and chainring may actually create worse performance than a “matched” or worn in set. If you are looking to replace just chains you should really watch their wear. Once they wear past about 50% of their life cycle replacing just the chain becomes much more likely to be problematic.

Some issues you will see include not wanting to hold rear cogs, particularly under power. This slipping is noisy, annoying, and may have you spin out in a critical section. Not fun. Worn out chainrings will tend to “hold” the chain. Instead of correctly releasing the chain inline with the bottom rear derailleur pulley the chain hangs up which creates a tick and hinders crisp shifting.

Questions? No problem we’re here to help. Email, Chat or Call and we will get you the right parts for you project!

Other Popular Upgrades when Replacing a Drivetrain

Cable & Housing replacement during drivetrain replacement is very common.

While you have the bike apart it’s a good time to replace that worn BOTTOM BRACKET.

MTB Drivetrain Replacement Kits

We offer complimentary ground shipping on orders above $50*

Expedited shipping is available.
Contact us before or during your purchase and we will provide a quote. (we have found shipping widgets tend to overcharge clients, not our style. Currently expedited shipping is manually entered. However, we're beta testing new widgets to speed the process.)

Most product ships from our Lake Forest, California brick and mortar.

Typically California, Nevada as well as Arizona are 1 day shipping utilizing On-Trac.

Beyond the southwest we ship with UPS.

Washington, Oregon, Idaho, Utah and Colorado, with the exception of more remote areas, are 2 day shipping.

The map below gives you an idea of typical shipping timelines from Lake Forest CA for reference.

BIkeCo Shipping Times


Some products are drop shipped from other distribution channels, which may shift delivery windows slightly.

If you have a critical timeline don't hesitate to let us know. We will provide you all available options. Contact us by email, call as well as chat.

International shipping is available for some products. Contact us for details.

High value items require an adult signature for delivery. In addition, to protect clients and cardholders high value shipping may require additional checks.

*some (but not many) exceptions apply but we will let you know. example: bikes ship free. $50 of lead ingot won't...

We realize there are a lot of product channels these days. So what separates BikeCo from the competition? It turns out a lot.

The Right Products at The Right Price.

Since 1999 The Bike Company has been on the cutting edge of MTB. We work with racers at the very top tier of MTB. This experience helps us better understand which bits work and which don't. We pride ourselves on offering clients access to the very best components in MTB across a variety of price points. Sure there are brands we could push with more margin - but our client's riding experience is our motivation. If it wouldn't be on one of our bikes you're not going to find it here.

BikeCo works hard to keep our pricing competitive and accessible for everyone. No secret mystery coupon codes. No scouring the internet on sleazy sites to make sure you're "cool enough" to get the best pricing available. We'd love you to follow us on Instagram, Facebook and our weekly emails - but if you prefer anonymity it's not going to cost you.

Our current digital coupons are listed here.
In fact, our coupons are setup to auto apply in the cart for applicable purchases.

If you ever have any questions on pricing, shipping, whatever, we are available by phone, email and online chat. Our team is happy to help you get the best product for your riding.

After Sales Service

Modern mountain bikes are complex. A turn here, PSI there, and your bike comes alive (or, well, doesn't). The experience working with the fastest riders in MTB gives our team the ability to dial in clients setups. We enjoy helping client's find that "ah ha" moment when their bike comes into its potential for their specifics. Your size, aggression, ground speed, terrain, goals - all of these go into your setup.

BikeCo's team are experienced riders across a variety of disciplines. When we use the word "team" it's not corporate rhetoric. To get clients the very best answers BikeCo's staff actively works with each other. Whether it's the newest grom, or owner Joe Binatena, who answers the phone you have access to everyone on staff.

Tunes, Setups, How-To's

Want to take your bike's performance to the next level?

Learn more about our Pro Tune Suspension services that narrow the Fox Shox performance windows to your riding specifics.

Or check out our Blog for more posts reviewing products and concepts.

Need a quick fix on your rig? BikeCo's How-To section goes through some common fixes to keep you on the trail.