StW-M Mountain Bike Crankset

Precision for the Trail. Built for Whatever You Throw At It.

Engineered to be the last crank you ever need.

Whether you're sending singletrack, grinding climbs, or navigating technical terrain, the StW-M is CNC-machined from billet aerospace-grade Ti-6Al-4V — and built around the same three obsessions as every Wert component: compatibility, ergonomics, and performance that punches far above its featherweight.

Titanium stiffness transmits your power more directly, preserves your energy more efficiently, and keeps your pedal stroke stable and consistent — lap after lap, hour after hour. The proof is in the riding.

There's a trail-specific advantage too: the StW-M's slim arm profile means less material between your pedal and the ground, giving you more clearance than a conventional crank at the same arm length. Prefer longer arms for more leverage? You may now run them without sacrificing clearance.

Our proprietary AxLoQ clamping system delivers 5 mm of axle width adjustment, so DUB and DUB Wide compatibility live in a single crankset. Switch between them with a cassette tool and a hex key. No pre-load rings. No compromises.

We joke that a ~320 g StW-M crankset rides like a 700 g crankset — because it doesn't know we removed nearly 200 grams per arm.

Ideal For:

• Trail, enduro, and all-mountain riders

• 1× drivetrains

• Riders who want titanium durability without the weight penalty

Specifications:

• Material: Aerospace grade Ti-6Al-4V (AMS 4928 / Grade 5 / TC4) — arms & spindle

• Hardware: AL7075-T6, coated for lubricity & galvanic corrosion protection

• Weight: 324 g (175 mm arms)

• Arm Lengths: 175, 172.5, 170, 165 & 157.5 mm

• Q-Factor: 164 mm (Boost MTB standard) 

• Spindle: Ø30 mm DUB (Ø29 mm via adapter)

• Chainring Interface: SRAM 8-bolt direct-mount · 1× compatible

• Finish: Raw CNC-machined · zero post-processing

• Warranty: Lifetime Limited Warranty