Kogel Aluminium Derailleur Pulley - Pair Seal & Fit:SRAM 10/11 Speed Road 68mm / 73mm bottom bracket

68mm / 73mm bottom bracket shells

Stable side knobs provide excellent traction on soft dirt to loose over hard and gravel ballz surfaces

High stability under pressure

Works with most road bikes with split seat stays

Calipers are forged aluminium and have further been weight reduced and re-shaped for 2012

Kogel Aluminium Derailleur Pulley - Pair Seal & Fit:SRAM 10/11 Speed Road 68mm / 73mm bottom bracketSpin It's known that your pulley wheels are subject to a lots of spinning. Have really clean or good quality pulleys can reduce drivetrain friction up to 15%. Not only that your bike runs quieter and will shift better. Kogel Ceramic Pulley feature Grade3 Abec 5 ceramic beraings, they offer smoother spinning over typical steel bearings and have an aluminium body for extra durability. There is both a road and mtb cx specific. MTB are have a bit more