It is compatible with both oval and round chain rings

Two Hex bolts included

Dual compound rubber: Balances tread life

Perfect for trail and Enduro

and laser-cut ventilation

Enduro MR 15307 15 x 30 x 7mm Bearing - ABEC 5 Bearing PLP|Model Year It is compatible with bothKeep your bike running smoothly with Enduro MAX bearings. A worn out bearing can cause creaking, unwanted play, and could eventually lead to frame damage. These are the most popular bike specific bearings offered today. These bearings are for riders looking to replace the worn out bearings on their frames. Grade 10 Chromium Steel Balls MAX bearings do not use retainers. The allows for a 40% increase in capacity. 52100 High Carbon Chromium Alloy Races