Thread: Bottom bracket options
View Single Post
Old 02-24-21 | 01:13 PM
  #5  
Iride01's Avatar
Iride01
Facts just confuse people
Titanium Club Membership
5 Anniversary
Community Builder
Community Influencer
 
Joined: Jul 2017
Posts: 19,083
Likes: 6,920
From: Mississippi

Bikes: Tarmac Disc Comp Di2 - 2020

Originally Posted by oldbobcat
There are two tapers, JIS and ISO. ISO is for vintage Campagnolo and possibly other obscure European cranks. Ask your bike shop for any 73x125.5 JIS BSA-threaded bottom bracket.

It looks like Shimano is replacing their BB-UN26 and BBUN-55 with a new model, BB-UN300. Unfortunately, it looks like nobody has these in stock yet. You might have to shop around and consider off-brands.
Yeah, when I looked at the manufacturer site for the VP-BC73. they just said they were made for modern square taper cranks. I didn't want to delve deeper in my search to find out specifically "modern" square taper they were.

I would think that the UN-300 probably will work.
https://www.universalcycles.com/shop...&category=6042
Supposedly they are in stock.

But the OP shouldn't take my word for it being a direct replacement. They should maybe call and ask someone there what they think.
Last edited by Iride01; 02-24-21 at 01:21 PM.
Iride01 is online now  
Reply
0