A great replacement model for older bikes that already have square taper cranks.
Shimano’s BB-UN55 bottom bracket carries the Shimano mark of a quality component. It’s a sealed cartridge unit available in a range of sizes for your mountain bike, and featuring English thread, and a JIS Square Taper axle. For convenience the BB-UN55 comes assembled and greased, all ready for installation.
Features & Specifications
Model: BB-UN55
Sizes: Choose from what’s displayed in the drop down menu
68x113mm
68x118mm
73x113mm
Axle Style: JIS Square Taper (shimano, sugino, truvativ, and most other cranks)
Sealed cartridge unit
Does not include crank bolts
Thread: English thread
Weight: 313 grams
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