Who's this item for: Best suited for XC

and with the included AnyValve pump head with an air bleed button you can dial in your pressures easier

They are also dishwasher (top-shelf recommended) friendly

Compatible with Azur air cartridge regulator

These are specifically made to suit the TLD A2 helmet only

Enduro 6903 - 61903 17 x 30 x 7mm Bearing - Standard ABEC 3 Bearing eBay Who's this item for: BestEnduro Standard Abec 5 are premium replacement bearings. These are great for hubs, pedals, and bottom brackets. ABEC 5 bearings feature: Grade 5 Chromium Steel Balls. In spec to 5 1,000,000 (military grade) 52100 High Carbon Chromium Alloy Races . What's the difference between ABEC 3 and ABEC 5? ABEC is an acronym for a committee that sets standards for bearings. Higher numbers mean higher tolerances (and price). For example, ABEC 3 balls are in