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View compareJX7 Adjustable Length MTB Crankset
One Crankset. Every Rider. Every Trail.
The JX7 Adjustable Length MTB Crankset isn’t just another crankset—it’s a game-changer. Designed to be one of the first commercially available adjustable-length cranks in the world, it gives you full control over your setup like never before. Whether you're dialing in the perfect fit, maximizing efficiency, or sharing your bike with different riders, the JX7 adapts to you.
Find Your Perfect Fit
With adjustable crank arms from 145mm to 175mm in 5mm increments, the JX7 is a true one-size-fits-all solution. No more second-guessing crank length—experiment, fine-tune, and find what works best for your riding style.
Built to Ride Hard, Designed to Pedal Efficiently
We engineered the JX7 using Finite Element Analysis (FEA) to make sure it can handle real-world abuse while staying light enough to pedal efficiently. Every gram of excess material has been removed without sacrificing strength, so you can power up climbs and charge down descents with confidence.
JX7 Adjustable Length Crankset
JX7 Adjustable Length Crankset
Regular price
$227.00 CAD
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Starting at
Unit price
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$227.00 CAD
Regular price
$307.00 CAD
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Product Type:
Vendor: R Theory Cycleworks
Hurry! Only 18 left in stock
The JX7 Adjustable Length MTB Crankset is more than just a crankset—it’s the future of customization. Find your perfect length. Ride your perfect ride.
Seamless Compatibility
- Fits all modern Boost frames
- Compatible with standard 3-bolt direct mount chainrings
- Includes stainless steel fasteners for long-term durability
- UV-resistant hard anodized finish to keep it looking fresh
Talk about your Ready for Any Trail
Designed for XC, Trail, and Enduro, the JX7 is precision-machined from 7075 aluminum for the perfect balance of durability and weight. At just 690 grams, it's built to perform without weighing you down.