Bicycle Crank & Chainwheel GOSSAMER BB30 shaft core aluminum alloy CNC hollow sprocket wheel disc brake road bike sprocket crank length 170/172.5/175mm optional
AL6061/T6 forged aluminum alloy crank
AL7050 forged BB368EVO mandrel
AL7075 full CNC chainring
High quality steel toothed disc screw
ABS design improves shifting performance
Compatible with S-HIMANO-11 speed 22 speed system
Crank length 170mm, 172.5mm, 175mm optional
Number of teeth 34-50T
Adapter BB86 five-way width +46mm five-way pressure into the inner diameter + BB30 mandrel
Adapter BB92 five-way width +46mm five-way pressure into the inner diameter + BB30 mandrel
Gear and crank weight: about 760g
[product technical analysis]
Gossamer is a high-end sprocket for the aluminum alloy enthusiasts. It has a history in the Paris-Roubaix battlefield and does not need to be rumored.
But the details can not be ignored, not only because of its new smooth integration design, the forged aluminum handle is heavily fanned in order to achieve a good strength-to-weight ratio, and the Gossamer crank is impressive. Lightweight, only 751 grams.
The universal BB368 axle is forged from a stronger alloy. This 30mm axle is compatible with the English Threaded 丶 SMN Press Fit and the bottom bracket of the BB30 with just a few spacers.
The sprocket wheel is made of even more tough 7075 aluminum alloy from a computer lathe. It is specially designed for the fastest and precise shifting. The bolts of the sprocket wheel are extraordinarily strong and chrome molybdenum steel.
More hardness is our ABS asymmetric screw spacing system. The fifth bolt is hidden under the crank arm on the drive side, providing strength where it is most needed, providing resistance when vigorously stepping on, and allowing the shift to be exceptionally crisp. The Gossamer has four crank lengths and five shifting options. It can be used as a glove fit to match any combination of cycling and rider styles.
It can also be used with the optimized chain center line for 135MM O.L.D. disc brakes.