The products mentioned in this article are selected or reviewed independently by our journalists. When you buy through links on our site we may earn an affiliate commission, but this never influences our opinion.

Storck Powerarm Pro Road SL crankset review

Compact carbon road cranks

Our rating 
4.0 out of 5 star rating 4.0
GBP £989.00 RRP | USD $1,619.68
Storck Powerarm Pro Road SL inc THM Bearings

Our review

The best crankset we've tested, but the price is prohibitive
Skip to view product specifications

This outrageously priced THM-manufactured carbon crankset weighs virtually the same as the THM Clavicula, widely acknowledged as the lightest crankset in the world.


However, the Pro Road SL has a massive 30mm diameter axle, which provides a greater surface area for the left-hand crank to fit on, providing immense stiffness.

The steel bearings are designed to take sideways and vertical loads, so you can reasonably expect them to last.


THM also recognise that carbon crank arms are susceptible to damage, so the pedal threads are designed to pop out if hit too hard against the kerb. All in all, this crankset is superb, though it’s still hard to justify the cost.

Product Specifications


Name Powerarm Pro SL Crankset (09)
Brand Storck

Weight (g) 575
Features BB30 Technology
No. Of Crank Pieces 2
Crank Arm Lengths 170mm 172.5mm 175mm
Bolt Circle Diameter 110mm