Shimano BB-UN300 Square Taper Bottom Bracket (68-118mm) Size:Standard Wide range and smooth gear

Wide range and smooth gear steps optimized for a broad scope of riding styles

Built-in inner anti-slip surface for maximum control

Harmful chemicals are entirely avoided

Harder and more wear resistant than steel

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Shimano BB-UN300 Square Taper Bottom Bracket (68-118mm) Size:Standard Wide range and smooth gearSpecifications A good quality bottom bracket for traditional chainsets Durable, hard wearing sealed cartridge bottom bracket with square tapered spindle fitting Better chainline stability with chain line stabilizer Maintenance free sealed cartridge bearing assembly keeps out dirt, mud, and water for long bearing life Fast and easy installation without adjustment Narrow body allows clearance for cable routing under the bottom bracket Crankarm fixing