Using a double chainset off-road instead of the normal triple makes sense with Controltech’s interesting ring sizes.
The 40t outer ring is smaller than anyone else’s (normally 42/44), ensuring low ratios and a high cadence for more mountainous areas.
Hard 7075 T6 alloy shows good wear, while a 94mm bolt circle diameter will ﬁt any mountain bike compact double crank. Shifting is smooth and precise thanks to steel pins, machined ramps and proﬁled teeth.
It’s hard to criticise a component that simply does it’s job. We’ll know more about ring durability after further testing.