In competition every little detail counts; that´s why steel & titanium were used when producing Record™ cassettes. The perfect teeth design results in a perfect synchronization between shifting & chain movement. The six larger sprockets are divided in triplets, which are mounted on special frames to increase rigidity. FEATURES & BENEFITS ULTRA-SHIFT™ TEETH DESIGN: every sprocket tooth is designed & placed to perform a specific function, such as raising or lowering the chain or giving maximum power transmission to the wheel. REINFORCED MOUNTS FOR SECOND & THIRD TRIPLETS: reater sprocket set rigidity performance, precision. ULTRA-SHIFT™ SYNCHRONIZATION: sprocket tuning allows for maximum shifting performance without hesitation: fast, accurate, & quiet, even under stress. 3 TITANIUM SPROCKETS: less weight