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Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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Description
Shimano BB-UN300 Bottom Bracket - English, 73 x 113mm Spindle, Square Taper JISShimano BB UN300 Square Spindle Bottom Brackets Fits JIS square taper cranksets Crankarm fixing bolts sold separately Hollow spindle Product Specifics Defined Color: Black Bottom Bracket Shell I. D.: 1. 37 Spindle Length: 113 Spindle Interface Type: Square Taper JIS BB Shell Width (mm): 73 BB Frame Interface: English Today's Stock Status 10+ Available to ship in 2 4 Business Days UPC: 192790619217 EAN: Not available Manufacturer Part Number:
Shimano BB-UN300 Square Spindle Bottom Brackets- Fits JIS square-taper cranksets
- Crankarm fixing bolts sold separately
- Hollow spindle
Product Specifics
- Defined Color: Black
- Bottom Bracket Shell I.D.: 1.37
- Spindle Length: 113
- Spindle Interface Type: Square Taper JIS
- BB Shell Width (mm): 73
- BB/Frame Interface: English
Today's Stock Status
10+ Available to ship in 2-4 Business Days
UPC: 192790619217
EAN: Not available
Manufacturer Part Number: EBBUN300C13X
CR3490
154801-Q0-L
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 543 reviews
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Product Reviews
★★★★★ 1
Don't buy
Size: 23.6 Inch, Color: White
The shelf is very flimsy and not sturdy at all. It feels unstable and poorly made. Definitely not worth the money, I wouldn’t recommend wasting your time or money on this product.
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Reviewed in the United States on February 22, 2026
★★★★★ 5
Quality
Color: Black
Nice quality product!
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Easy Setup Looks Great
Color: Rustic Brown + Black
Easy to build yeah didn't come with drywall anchors luckily I got a butt load anyway.. nothing came warped just gotta follow instructions and look at the pictures if ya can't read.
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Reviewed in the United States on March 22, 2026
★★★★★ 5
Beautiful shelves
Color: Rustic Brown + Black
Beautiful shelves. Good quality, but a little difficult to assemble.
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Reviewed in the United States on October 26, 2025
★★★★★ 2
Packaging is a mess and product requires force to put parts together
Color: Black
Packaging is awful, makes a complete mess. The product itself is okay, the little rods that come with it don't slide in easily and force you to scrape the metal with them when you install it , not the greatest design. Instructions also are not the best. Also, why are the holes to hang the shelf at the bottom?? Doesn't make much sense
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Reviewed in the United States on April 9, 2026