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The Shimano UN55 Square Taper Bottom Bracket has super-accurate bearings for smooth operation and improved durability. With a durable and hard-wearing sealed cartridge, this bottom bracket is maintenance free and keeps dirt, water, and mud from penetrating the unit.
A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).
Buy Shimano Footwear from Chain Reaction Cycles, the World's Largest Online Bike Store.
If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.
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