Kogel Aluminium Derailleur Pulley - Pair Seal & Fit:SRAM 10/11 Speed Road In technical terrain this is

In technical terrain this is a god send

A braided hose and the zero-loss chuck prevents air being lossed after unthreading the pump off the valve

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

Works with most road bikes with split seat stays

Kogel Aluminium Derailleur Pulley - Pair Seal & Fit:SRAM 10/11 Speed Road In technical terrain this isSpin 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