Skip to main content
We may get paid by partner for deals, including promoted items

Menu

Trending
Top Brands Palmetto State ArmoryHot Yeti CoolerDeal NatchezDeal SitkaDeal 5.11Sale Winter Clearance Amazon Pickleball Sale Amazon FitnessHot Stores
Shimano UN300 Square Taper Bottom Bracket by Shimano - HARD GOODS/BOTTOM BRACKETS/THREADED/SQUARE
10% off

Product Description

Shimano BB-UN300 Square Spindle Bottom Bracket

FEATURES:

  • Fits JIS square-taper cranksets
  • Crankarm fixing bolts sold separately
  • Hollow spindle

Shimano UN300 Square Taper Bottom Bracket

at Mike's Bikes
Browse all Mike's Bikes deals
$14.39 $15.99 10% Discount
You save $1.60
In Stock at Mike's Bikes
Buy Now at Mike's Bikes
Secure checkout Easy returns
or compare prices
Amazon logo Amazon eBay logo eBay

Product Details

Category HARD GOODS/BOTTOM BRACKETS/THREADED/SQUARE
Brand Shimano
Condition new
MPN EBBUN300B18X
4590 HARD GOODS/BOTTOM BRACKETS/THREADED/SQUARE Shimano

More from Shimano

Browse All HARD GOODS/BOTTOM BRACKETS/THREADED/SQUARE
Mike's Bikes
Last Updated:
Aug 11, 2026 05:07 PM
Shimano UN300 Square Taper Bottom Bracket Shimano UN300 Square Taper Bottom Bracket View Details
$14.39 $17.99
20% off
Buy Now · $14.39
Mike's Bikes