🏷️ Not eligible for coupons or discounts.
Shimano SLX FC-M7100 Crank Arms
Shimano SLX FC-M7120 Crank Arms
Shimano SLX FC-M7130 Crank Arms
The Shimano SLX Crank Arms are compatible with the following:
Please reach out to us with any questions you may have about anything we sell. We want to make sure you get the right items the first time. Our lifelong riders at Thunder Mountain Bikes are knowledgeable and would love to talk to you!
We currently offer both economy and expedited shipping options through FedEx and USPS.
Most orders totaling over $69 before tax are eligible to ship for free via an economy ground option of our choice.
Due to larger box sizes, handlebars, wheels, and other oversized items, an additional shipping fee will be applied.
Most bikes ship for only $200 within the continental US. Bike shipping to AK, HI, or PR is usually $350, but may incur additional fees depending on the exact delivery location.
If you're in need of something super-quick, please contact us directly. We may be able to overnight your order with an additional fee, depending on your location.
Should there be an issue with the item you bought, or if you no longer need your purchase, we will be happy to set up a return.
Returns may be requested within sixty (60) days of the delivery date. All returned items must be received in new, unused, and uninstalled condition, with the original tags and labels attached and in the original packaging. We cannot accept returns on any items that have been installed or show wear of any kind.
Returns or exchange requests for bikes must be requested by emailing us at sedona@thundermountainbikes.com within fifteen (15) days from the date of delivery. Bikes must be in un-ridden condition. Custom-built bikes may not be returned. Returned bikes incur a $200 restocking fee, and the customer is responsible for the return shipping costs.
Customers are responsible for return shipping fees and may choose the carrier of their choice to handle their product return. We no longer provide shipping labels directly.
For any return shipping questions, please email us at sedona@thundermountainbikes.com after submitting your return request so that we can confirm the shipping information you should use to return your item(s).
We will process your return after receiving your returned item(s) and inspecting their condition. Please allow at least seven (7) days from the receipt of your item to process your refund. We will notify you by email when your return has been processed. All refunds will be returned to the original payment method. No store credit or other refund methods are available.
If you receive defective or damaged products or if we sent you the wrong item(s), please contact us using the phone number or email below.
To request a return, please log in to your customer account by clicking the 
Profile icon in the top right of any page or visit account.thundermountainbikes.com.
1. In the Email field, enter your email address and click Continue.
2. In your email account, open the email sent from our store and copy the six-digit verification code included in the email.
3. Go back to the online store and enter a six-digit verification code to log in.
4. Find and click on the order you want to submit a return for.
5. If your order has more than one item, select only the items you want to return.
6. Select a return reason and add a note for the store if needed.
7. Click Request Return.
Once your return request is approved, you will receive a confirmation by email.
If you have any questions concerning our return policy, please contact us at:
As a return customer to TMB, Ian, as usual, very helpful and offered his expertise/guidance on the proper cranks on my enduro build. I wanted 165mm length and he recommended 7120 model for the ideal chainline for my Boost frame. Fits perfectly and feels great! I wasn't very particular to drivetrain brands before, now prefer Shimano!
Great price quick shipped!
Really appreciate all the extra tools and extras that you can select when ordering a crankset. Made me feel more comfortable that I’d get all the tools I need to install. Crank went together easy and I’m liking the shorter 165mm arms.
I’ll order from you again.
Excellent product, excellent sellers...my new favorite store 👍🏻
The Shimano SLX crank was the upgrade I needed for an older setup. Super solid and easy to install. These are an amazing value.
I have made several purchases from Thunder Mountain Bikes, and I have nothing but positive things to say about them! Thanks!
Found this crankset at Thunder Mountain cheaper than anywhere else....ordered and it arrived in less than a week. Works perfectly, I would definitely purchase from TM again!
Fast shipping is a great product. Easy installation with the correct tools comes with spider lock nut
Great replacement for a Deore (or lower)! Drops significant weight and pairs well with other Shimano parts.
Great looking and great working cranks!! Very easy to install!
Have been using 170mm for a long time, but decided to try a shorter one (I’m 5’8”, 30” inseam). It’s only 5mm shorter but the difference is quite big in better ways. Pedaling feels smoother, and narrower stance suites me better for going downhill.
Shipping was quick and price was good!
I ordered bottom bracket and cranks on 4/24 and received them within 4 business days. Pricing was very competitive. Will definitely return when I'm in the market for more parts.
Great price, good cranks. Needs a special tool.
Can't beat the price and quality on SLX.
I'm 5'6" and wanted to swap my 170mm Deore cranks for 165mm, and these SLX fit the bill as I couldn't find Deore in 165mm. I definitely experience fewer pedal strikes with 5mm shorter cranks, and SLX is a notch higher in Shimano's lineup than Deore, which usually translates into lower weight.
I called to verify fitment before ordering, and spoke with an actual human. Very friendly service and super fast shipping. I'll definitely be a returning customer.
Being new to mountain biking, i quickly became an expert in shimano crank arms and drivetrain nomenclature when trying to order the correct model for my bike in the length of crank arm i desired. I went from 175mm to 165mm. Found what I needed at thunder mountain. They shipped quickly all the way across the U.S. Parts went right on like i was making a youtube how to video. Now i don't strike my pedals where i used to. Think 10mm difference is very noticeable on the clearance it provides. Not sure i would waste my time on anything less if you're looking to change the length of your crank arms.
SLX Crank Arms
Not only are they beautiful to look at they are strong and willing to smoke some dirt.Great deal for such nice cranks.
Fast shipping, easy transaction and items well packed.
