R Theory Cycleworks

R Theory Cycleworks Driven by passion, designed for adventure. Innovative mountain bike components for everyone.

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Most bikes come stock with longer cranks than they need. Not because it’s better, but because it’s simpler to manufactur...
04/21/2026

Most bikes come stock with longer cranks than they need. Not because it’s better, but because it’s simpler to manufacture at scale.
Frame sizes are already split across multiple SKUs. Adding crank length options on top of that adds complexity most brands avoid. So they spec something “safe” for the average rider, even if it’s not actually optimal.

Longer cranks mean your feet travel further every pedal stroke. That usually leads to more hip movement, more knee flexion at the top of the stroke, and a higher chance of pedal strikes on trail.

Dialing in the right crank length for your body helps keep your movement more controlled and efficient. Less strain on your joints, better clearance in technical terrain, and smoother cadence.

And here’s the part most people don’t expect.
Shorter cranks don’t mean less power.

When they’re sized properly, they often let you produce the same power with better efficiency and less fatigue. For a lot of riders, that means stronger efforts over time, especially on climbs and longer rides.

That’s exactly why we built our cranks.
Adjustable length, so you can actually dial in what works for your body instead of settling for whatever came on the bike.

One crank fits all. 🚴Introducing the GR7 and TR8 Adjustable Length Cranksets. The only crankset that guarantee a perfect...
04/01/2026

One crank fits all. 🚴
Introducing the GR7 and TR8 Adjustable Length Cranksets. The only crankset that guarantee a perfect fit, from 140mm to 175mm. Gravel, road, or trail. Dial in your ideal position and ride faster, longer, and more efficiently.

Available now at rtheorycycleworks.com

bikefitting cyclingupgrade gravel mtb mountainbiking

NEW PRODUCTS are here!We're kicking off the 2026 season with the launch of two new cranksets! GR is for Gravel and Road....
02/20/2026

NEW PRODUCTS are here!

We're kicking off the 2026 season with the launch of two new cranksets!

GR is for Gravel and Road. TR is for the trail.

Both cranksets offer adjustable length from 140mm to 175mm. Riders no longer have to wonder what crank length best suits their body and riding style. You can now trial different crank Lengths with one set of cranks! This opens up a new realm of possibilities for riders on the road and off the beaten path.

Riding proper fitting cranks will take you further, with less energy, and you'll get there quicker.

Discover the GR7 and TR8 today on rtheorycycleworks.com

Two new original products are launching THIS MONTH.We’ve spent the past year testing, refining, and validating these new...
02/05/2026

Two new original products are launching THIS MONTH.

We’ve spent the past year testing, refining, and validating these new cycling parts, and we’re getting close to finally showing you what’s been in the works.

More details soon. Stay tuned.

🔥New Product Drop🔥Our Bike Rack License Plate Quick Release System is finally here!No more fiddling with tools to swap p...
09/03/2025

🔥New Product Drop🔥
Our Bike Rack License Plate Quick Release System is finally here!

No more fiddling with tools to swap plates, or rolling the dice on a ticket when your rack blocks your plate. Just pop your plate off your car and snap it onto your rack in seconds—no tools, no hassle.

Built on the same proven tech from ’ best-selling PQR, now re-engineered for cyclists. Slim, secure, and ready for every shuttle road, dirt trail, and highway drive.

👉 Ride worry-free. Drive ticket-free.
https://www.rtheorycycleworks.com/collections/bike-rack-license-plate-mounts/products/bike-rack-license-plate-quick-release-system

We've put a temporary pause on our crank program to address some improvements needed in our first batch. But in the mean...
08/30/2025

We've put a temporary pause on our crank program to address some improvements needed in our first batch.

But in the meantime, we're launching something else that is new for the bike industry... and we can't wait to share it with you soon! 🤐😁

Meet our JX7 Adjustable Length Crankset! We wanted to develop a true one size fits all for MTB riders of all heights and...
05/13/2025

Meet our JX7 Adjustable Length Crankset! We wanted to develop a true one size fits all for MTB riders of all heights and proportions.

The JX7 is adjustable from 145 -> 150 -> 155 -> 160 -> 165 -> 170 -> 175 millimeters in length. It uses a dovetail system paired with Titanium locking bolts to dial in your ideal length. CNC Machined out of burly 7075 aluminum to take you to the top of the mountain, and back down, all day long.

Meet our JX7 Adjustable Length Crankset! We wanted to develop a true one size fits all for MTB riders of all heights and...
05/13/2025

Meet our JX7 Adjustable Length Crankset! We wanted to develop a true one size fits all for MTB riders of all heights and proportions.

The JX7 uses a common 3 bolt Direct Mount chainring interface, so you won't have a tough time finding a replacement chainring when it's time for you to replace yours. You can purchase chainrings with your new JX7 crankset on our website!

www.rtheorycycleworks.com

That feeling when you get to the trailhead. You don't know where you're going... you only know you're going somewhere ep...
04/28/2025

That feeling when you get to the trailhead. You don't know where you're going... you only know you're going somewhere epic.

Address

Toronto, ON

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