Box One™ Chain Tensioners are extruded then CNC-machined from 7075 aluminum for an optimal balance of strength and weight

FRAME MATERIAL: 4130 CRMO DT

Reflective details remain visible in low light (when riding back from the track

durable and rigid

It's paired with a whole host of quality aftermarket parts from Rant

Fly Dolmen 2 22mm Cranks Size:180mm Box One™ Chain Tensioners areFly's Dolmen II Cranks from Fly feature a one piece invest cast pedal boss which means no welding on the pedal boss, resulting in a much stronger arm with a smoother, cleaner look. Made from 4130 Chromoly with an internally CNC machined spindle for increased stength and durability, the Dolmen Cranks also feature Fly's bend resistant D shaped arms. Finished with heat treated CNC machined bolts with sink allen hex. ###section### Product Specs Crank