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Shimano BB-UN300 Bottom Bracket 73 x 118mm XL without Fixing Bolt
The Shimano BB-UN300 Bottom Bracket 73 x 118mm XL without Fixing Bolt is a square type bottom bracket designed for mountain bike applications with a standard structure. Featuring a chain line stabiliser you’ll have better stability. The Shimano BB-UN300 Bottom Bracket 73 x 118mm XL without Fixing Bolt is of a aluminium construction.