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Shimano BB-UN300 Square Taper JIS 68x113mm Spindles BSA (English) Bottom Bracket

US $19.89
ApproximatelyC $27.48
Condition:
New
50 available16 sold
People are checking this out. 5 have added this to their watchlist.
Breathe easy. Returns accepted.
Shipping:
Free USPS Ground Advantage®.
Located in: East Petersburg, Pennsylvania, United States
Delivery:
Estimated between Wed, Aug 20 and Wed, Aug 27 to 94104
Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the shipping service selected, the seller's shipping history, and other factors. Delivery times may vary, especially during peak periods.
Returns:
30 days return. Buyer pays for return shipping. If you use an eBay shipping label, it will be deducted from your refund amount.
Payments:
     Diners Club

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eBay item number:194473678105
Last updated on Aug 07, 2025 17:41:20 EDTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...
Brand
Shimano
Set Includes
Bottom Bracket
Part Type
Bottom Bracket
Bottom Bracket Shell Type
BSA (English)
Spindle Type
Square Taper - JIS
Shell Width
68mm
Material
Steel Bearings
Compatible Bike Type
Hybrid/Comfort Bike, Road Bike - Touring, Cruiser, Mountain Bike
Color
Black
Item Width
68mm
MPN
EBBUN300B13X
Item Weight
0.1700
Model
BB-UN300 Bottom Bracket
California Prop 65 Warning
STANDARD
Manufacturer Warranty
2 years
UPC
192790619323

Item description from the seller

About this seller

365 Cycles

99.6% positive feedback811K items sold

Joined Dec 2001
Usually responds within 24 hours
365 Cycles delivers all your cycling needs fast! We don't waste time preparing your order. Our priority is to serve our customers first and foremost. If you need help picking the right product, have ...
See more

Detailed seller ratings

Average for the last 12 months
Accurate description
5.0
Reasonable shipping cost
5.0
Shipping speed
5.0
Communication
5.0

Seller feedback (285,476)

All ratings
Positive
Neutral
Negative
    • e***d (814)- Feedback left by buyer.
      Past month
      Verified purchase
      Most excellent!!!
    • r***s (294)- Feedback left by buyer.
      More than a year ago
      Verified purchase
      Item arrived in great condition, fast shipping.
    • 7***7 (758)- Feedback left by buyer.
      More than a year ago
      Verified purchase
      Just as described and promptly shipped. A+
    See all feedback

    Product ratings and reviews

    4.9
    10 product ratings
    • 9 users rated this 5 out of 5 stars
    • 1 users rated this 4 out of 5 stars
    • 0 users rated this 3 out of 5 stars
    • 0 users rated this 2 out of 5 stars
    • 0 users rated this 1 out of 5 stars

    Would recommend

    Good value

    Good quality

    Most relevant reviews

    • Easy Installation

      I bought this product after changing from a double crank set to a triple crank set. My original was 124mm and this Shimano was 113.5. I worked out great in helping to align my chain rings with my rear 8 speed cassette.. I should point out that, when installed in my 68mm frame, the left crank was slightly farther away than the right chain ring side from the frame. This worked out well for me because it helped to align my chain rings with the 8 speed cassette better. There were no problems with installation, it went into the frame smoothly. Much easier to install than the cup and cone bottom bracket I had before. As I look at the picture, it shows some kind of black washer on one side. I don't remember that on the one I received, and I wonder if that may be the reason one crank is ...

      Verified purchase: YesCondition: NewSold by: gap30cycles

    • The UN-300 is the best budget-friendly square taper bottom bracket available. If cost is an issue and weight isn't, this is a great choice.

      The UN-300 is the best budget-friendly square taper bottom bracket available. If cost is an issue and weight isn't, this is a great choice.

      Verified purchase: YesCondition: NewSold by: cyclesport_usa

    • very good but could be better

      The thin left side cup is made of soft aluminum, splines of which deform to some extent while cup tightened to the proper torque. Otherwise well made and finished product.

      Verified purchase: YesCondition: NewSold by: pitcrewcycles

    • Good quality!

      This part was good quality and arrived quickly.

      Verified purchase: YesCondition: NewSold by: wheelandsprocket

    • easy process

      worked for me

      Verified purchase: YesCondition: NewSold by: renewtechtraders