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Q-Rings boost your performance by varying drivetrain resistance during pedaling in line with your leg's natural strengths and weaknesses
1 mounting system is based on the proven Quick-Lock2 system but offers some improvements
1 Mounting System
Chris King® and other cassette lockrings
They clip on to your bike bag or mount to your bike
Shimano BB-5500 105 Octalink Bottom Bracket Size:68x109.5mm Q-Rings boost your performance bySplined bottom bracket designed for use with Shimano road Octalink crankset. Features Oversize BB spindle large 22mm diameter chrome moly hollow pipe billet spindle reduces weight, increases strength and rigidity Octalink splined axle crank arm interface results in a more rigid crank assembly compared to square tapered spindle Maintenance free sealed cartridge design prevents corrosion and is easy to install Aluminium adapter Average weight: 250g BSA
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