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We designed the TR8 Adjustable Length Crankset around one simple idea: one crankset that optimizes fit and pedaling efficiency for every rider, from XS to XL. Machined from high-strength 7075 aluminum, it’s engineered to clear obstacles on the downhill and take you back to the top with the kind of efficiency that keeps you fresh to do it again.

Most bikes come spec’d with cranks that are far too long for the average rider. Even a 5mm discrepancy in length can result in wasted energy, increased pedal strikes, and unnecessary joint wear. The TR8 allows you to fine-tune your crank length to your specific body and riding style. It’s a difference you’ll feel in the parking lot before you even reach the trailhead.

The TR8 utilizes an adjustable dovetail system paired with Grade 12.9 fasteners, giving you a range from 140mm to 175mm in 5mm increments. To ensure maximum durability, we chose a 7075 aluminum construction coated in a Type 3 Hard Anodized finish. At 885g, the TR8 prioritizes durability and precision adjustment over gram-shaving. However, the biomechanical advantage of a perfect fit far outweighs the scale weight. By optimizing your leverage and hip angle, you will pedal more efficiently and produce more usable power than you ever could on a "lightweight" 175mm carbon crankset.

We believe optimizing crank length is as essential as setting your seat post height. Once you find your "sweet spot" with the TR8, there is no going back. You’ll accelerate faster, climb with more sustained power, and clear technical sections that used to threaten you with pedal strikes. Fine-tune your ride with the TR8, and you’ll wonder why you were fighting against long cranks for so long.

Chainring sold separately.

Tech Specs:

Intended Use: Cross Country, Trail, and All Mountain riding
Bottom Bracket Compatibility: 24mm, Hollowtech
Chainring Interface: 3-bolt direct mount
Chainring Quantity: x1 by default, x2 compatible with SRAM Spider
Recommended Chainring Offset: 3 mm offset for Boost Frames
Crank Length: 140, 145, 150, 155, 160, 165, 170, and 175mm length in a single crankset
Q-Factor: 180mm
Material: 7075 Aluminum construction with 24mm chromoly steel axle
Preload System: Aluminum Pre-Load Collar
Frame Compatibility: Axle length designed for standard boost frames
Hardware: Grade 12.9 Fasteners
Weight: 884g without chainring

Frequently Asked Questions

What crank lengths are available on the TR8 Adjustable Crankset?

The TR8 allows riders to adjust crank length from 140mm to 175mm in 5mm increments, providing a highly customizable fit for different riding styles and rider sizes.

Who should use an adjustable crankset?

The TR8 is ideal for mountain bikers, trail riders, cross-country racers, growing riders, and cyclists looking to optimize bike fit and pedaling efficiency.

Why does crank length matter?

Crank length affects pedaling mechanics, comfort, power delivery, and bike control. Finding the correct crank length can reduce fatigue and improve overall riding performance.

Is the TR8 compatible with modern mountain bikes?

Yes. The TR8 is designed for compatibility with modern Boost frame standards and standard 3-bolt direct mount chainrings.

Can shorter crank lengths help reduce pedal strikes?

Many riders choose shorter crank lengths to increase ground clearance and reduce pedal strikes when riding technical trails and challenging terrain.

What material is used in the TR8 crankset?

The TR8 is precision machined from high-strength 7075 aluminum and designed to deliver exceptional durability for trail, cross-country, and all-mountain riding.