Includes metric and fractional spoke length markings

(Example: String is 140mm long)

Compatible with Azur air cartridge regulator

These are specifically made to suit the TLD A2 helmet only

Regular cleaning of these important components helps to prevent premature wear

Enduro 6903 - 61903 17 x 30 x 7mm Bearing - Standard ABEC 3 Bearing eBay Includes metric and fractional spokeEnduro 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