BSA Bottom Bracket for Shimano Road

Marsoni

M251S

$4249.50

Get it in 3 business days with 1 day shipping. Friday, May 29

BSA Bottom Bracket for Shimano RoadBSA is another way of stating English threading; it comes from British Standard Cycle. English threading on road bikes mean a 68mm wide, 34mm inside diameter shell with reverse threading on the drive side. Its the most common threaded standard employed today. This kit works with 24mm diameter thru axle cranks, found on Shimano, FSA, Rotor, among others. Choose between two bearings for the cups. Standard Bearings have low drag thanks to hardened steel

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Reviewed in the United States on May 21, 2026

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