
* Compatible with Ultra-Shift chains* Nickel chrome finish on steel cogs* 180% Increase in torsional stiffness vs Ultra-Drive cassettes* 6 titanium sprockets on 2 alloy spiders
* Compatible with Ultra-Shift chains* Nickel chrome finish on steel cogs* 180% Increase in torsional stiffness vs Ultra-Drive cassettes* 6 titanium sprockets on 2 alloy spiders