Shimano-BB-UN300-Bottom-Bracket-68mm-Square-Taper-JIS-Bottom-Bracket-CR3489-Bicycle-Bottom-Brackets

SKU: CR3489

Shimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 50mm Chainline

Shimano
$20.16
$20.16 $25.95
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Manufacturer Warranty

This is a pre order item. We will ship it when it comes in stock.
Specifications

Spindle Length122.5
Bottom Bracket Shell I.D.1.37
Spindle Interface TypeSquare Taper JIS
BB/Frame InterfaceEnglish
BB Shell Width (mm)68 mm

Shimano BB-UN300 Square Spindle Bottom Brackets

  • Fits JIS square-taper cranksets
  • Crankarm fixing bolts sold separately
  • Hollow spindle
  • 50mm chainline
Description

Shimano BB-UN300 Square Spindle Bottom Brackets

  • Fits JIS square-taper cranksets
  • Crankarm fixing bolts sold separately
  • Hollow spindle
  • 50mm chainline

Customer Reviews

Based on 39 reviews
79%
(31)
15%
(6)
5%
(2)
0%
(0)
0%
(0)
M
Mike Albiston

The item that we ordered arrived on time and after a lot of effort it is now installed and working fine... If you don't have a lot of experience working on bikes you might consider taking it to a shop for it's not and easy project...

M
Mike Albiston

The item that we ordered arrived on time and after a lot of effort it is now installed and working fine... If you don't have a lot of experience working on bikes you might consider taking it to a shop for it's not and easy project...;

J
J.C. Smith

I replaced the original BB cartridge on my 2005 Giant Boulder. Instructions are non-existent but Installation is easy. You do need the correct tool. I torqued to 65 Nm hope that was correct. See Park Tools' site for videos.

J
J.C. Smith

I replaced the original BB cartridge on my 2005 Giant Boulder. Instructions are non-existent but Installation is easy. You do need the correct tool. I torqued to 65 Nm hope that was correct. See Park Tools' site for videos.;

j
jack black

The single best upgrade for big box Schwinn Mountain Bikes hands down.
Do yourself a favor and swap it out.
You won't regret it.
Happy trails.;

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