Chainring with areonautical aluminium alloy (AL7075-T6) teeth and structural 3K carbon fiber carrier.
Titanium pins and carbon inserts assure more smooth and precise shiftings.

All rings are 10/11 speed compatible but will work with 9 speed chainsets although shifting maybe less precise. 8 speed functionality is untested but should be acceptable.

Various tooth counts and BCD offerings

1) 44T/104mm BCD 4 arm 60g

2) 42T/104mm BCD 4 arm 58g

3) 42T/104mm BCD X double fits in the middle ring position to transform a triple chainset into a double. 58g

4) 40T/104mm BCD X double fits in the middle ring position to transform a triple chainset into a double. 54g

5) 44T/88mm BCD XTR M985 4 arm 60g

6) 42T/88mm BCD XTR M985 4 arm 58g

7) 40T/88mm BCD XTR M985 4 arm 56g

8) 42T/120mm BCD 4 arms SRAM XX and X.0, X.9 (MY 2011). 57g

9) 40T/120mm BCD 4 arms SRAM XX and X.0, X.9 (MY 2011). 52g

10) 44T/94mm BCD 5 arm outer for double or triple use. 63g

11) 42T/94mm BCD 5 arm outer for double or triple use. 52g