Kogel Aluminium Derailleur Pulley - Pair Seal & Fit:SRAM 10/11 Speed Road Calipers are forged aluminium and

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

The flattened nose and Active rear portion enhance on the bike ergonomics

68mm / 73mm bottom bracket shells

In technical terrain this is a god send

BOYD ran a lab test with 17Kgf of braking force off and on in 4 second intervals and ran this test for 20hrs

Kogel Aluminium Derailleur Pulley - Pair Seal & Fit:SRAM 10/11 Speed Road Calipers are forged aluminium andSpin 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