UN55 Square Taper English Threaded Bottom Bracket
Shimano

UN55 Square Taper English Threaded Bottom Bracket

EBBUN55C18

$25.99
/
Size

California Region

  • San Rafael 2-4 days 7-10 days
  • Sausalito 2-4 days 7-10 days
  • Berkeley 2-4 days 7-10 days
  • Palo Alto 2-4 days 7-10 days
  • San Francisco 2-4 days 7-10 days
  • Sacramento 2-4 days 7-10 days
  • Los Gatos 2-4 days 7-10 days
  • Petaluma 2-4 days 7-10 days
  • Walnut Creek 2-4 days 7-10 days
  • San Jose 2-4 days 7-10 days
  • Pleasanton 2-4 days 7-10 days
  • Folsom 2-4 days 7-10 days
  • Roseville 2-4 days 7-10 days
  • Stanford Research Park 2-4 days 7-10 days
  • Distribution Center Available
  • Distribution Center 2-4 days 7-10 days

Colorado Region

  • Denver East 2-4 days 7-10 days
  • Denver Downtown 2-4 days 7-10 days
  • Highlands Ranch 2-4 days 7-10 days
  • Parker 2-4 days 7-10 days
  • Distribution Center 2-4 days 7-10 days

California Region

  • San Rafael 2-4 days 7-10 days
  • Sausalito 2-4 days 7-10 days
  • Berkeley 2-4 days 7-10 days
  • Palo Alto 2-4 days 7-10 days
  • San Francisco 2-4 days 7-10 days
  • Sacramento 2-4 days 7-10 days
  • Los Gatos 2-4 days 7-10 days
  • Petaluma 2-4 days 7-10 days
  • Walnut Creek 2-4 days 7-10 days
  • San Jose 2-4 days 7-10 days
  • Pleasanton 2-4 days 7-10 days
  • Folsom 2-4 days 7-10 days
  • Roseville 2-4 days 7-10 days
  • Stanford Research Park 2-4 days 7-10 days
  • Distribution Center Available
  • Distribution Center 2-4 days 7-10 days

Colorado Region

  • Denver East 2-4 days 7-10 days
  • Denver Downtown 2-4 days 7-10 days
  • Highlands Ranch 2-4 days 7-10 days
  • Parker 2-4 days 7-10 days
  • Distribution Center 2-4 days 7-10 days

California Region

  • San Rafael 2-4 days 7-10 days
  • Sausalito 2-4 days 7-10 days
  • Berkeley 2-4 days 7-10 days
  • Palo Alto 2-4 days 7-10 days
  • San Francisco 2-4 days 7-10 days
  • Sacramento 2-4 days 7-10 days
  • Los Gatos 2-4 days 7-10 days
  • Petaluma 2-4 days 7-10 days
  • Walnut Creek 2-4 days 7-10 days
  • San Jose 2-4 days 7-10 days
  • Pleasanton 2-4 days 7-10 days
  • Folsom 2-4 days 7-10 days
  • Roseville 2-4 days 7-10 days
  • Stanford Research Park 2-4 days 7-10 days
  • Distribution Center Available
  • Distribution Center Available

Colorado Region

  • Denver East 2-4 days 7-10 days
  • Denver Downtown 2-4 days 7-10 days
  • Highlands Ranch 2-4 days 7-10 days
  • Parker 2-4 days 7-10 days
  • Distribution Center 2-4 days 7-10 days

California Region

  • San Rafael 2-4 days 7-10 days
  • Sausalito 2-4 days 7-10 days
  • Berkeley 2-4 days 7-10 days
  • Palo Alto 2-4 days 7-10 days
  • San Francisco 2-4 days 7-10 days
  • Sacramento 2-4 days 7-10 days
  • Los Gatos 2-4 days 7-10 days
  • Petaluma 2-4 days 7-10 days
  • Walnut Creek 2-4 days 7-10 days
  • San Jose 2-4 days 7-10 days
  • Pleasanton 2-4 days 7-10 days
  • Folsom 2-4 days 7-10 days
  • Roseville 2-4 days 7-10 days
  • Stanford Research Park 2-4 days 7-10 days
  • Distribution Center Available
  • Distribution Center 2-4 days 7-10 days

Colorado Region

  • Denver East 2-4 days 7-10 days
  • Denver Downtown 2-4 days 7-10 days
  • Highlands Ranch 2-4 days 7-10 days
  • Parker 2-4 days 7-10 days
  • Distribution Center 2-4 days 7-10 days

Free shipping on all orders over $49. $9 shipping for orders under $49.

Cannondale, Santa Cruz, Cervelo, Gazelle, BMC, and *other bikes ship for FREE, but Gold Label Assembly will be added at checkout for only $79 (reg. $100) to cover the professional bike build and re-packaging by our certified technicians. It’s bike shop quality, direct to your door!

Some bikes not eligible for shipping due to manufacturer restrictions.

Shop with confidence! It's important to us that you are happy with your Mike’s Bikes purchase so we offer offer a 30-day return/exchange window for your unused gear and 14 days on all bikes. Our exchange and return process is fast and easy. If you choose to exchange for a different size or color, we will ship your product for free.

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Shimano's BB-UN55 Square Spindle Bottom Brackets are the unofficial standard for English-threaded cartridge bottom brackets. Quality, value, and durability come together to keep you cranking for many, many miles. - Fits JIS Square-Taper Cranksets - Hollow spindle - Crankarm fixing bolts not included