4 is designed to remove and install BB30

Highly versatile

- Rock-solid design is stable for any size or style of rider and the most punishing of training sessions

With extra padding on the bottom of the foot

but that said

Enduro MR 18307 18 x 30 x 7mm Bearing - Standard ABEC 3 Bearing PLP|Model Year 4 is designed to removeEnduro Standard Abec 3 are great replacement bearings for hubs, pedals, and bottom brackets. Grade 10 Chromium Steel Balls. In spec to 10 1. 000. 000 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 tolerance to 10 1. 000. 000" vs. 5 1. 000. 000" found in the