Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take Part in the October Giveaway to Win the Qiolor TIGER Retro Electric Bike


Bottom Bracket install - plastic cup
#1
I am replacing my old BB with a Shimano UN26 and can't work out how to tighten the plastic cup on the left side. My tool (UN54) works fine on the chain side but not on the left. I was told at the shop that I just needed to tap the tool to make it fit the plastic cup but after destroying one plastic cup, I am at a loss. Do I need to purchase a specific tool for a plastic cup? I read that the UN26 now comes with an alloy cup that replaced the plastic version.
  Reply
#2
(04-29-2012, 07:17 AM)Ian Penna Wrote:  I am replacing my old BB with a Shimano UN26 and can't work out how to tighten the plastic cup on the left side. My tool (UN54) works fine on the chain side but not on the left. I was told at the shop that I just needed to tap the tool to make it fit the plastic cup but after destroying one plastic cup, I am at a loss. Do I need to purchase a specific tool for a plastic cup? I read that the UN26 now comes with an alloy cup that replaced the plastic version.

Very strange the tool should be the same on both sides, have you tried putting a rear QR through the axle to hold the tool in place?
  Reply
#3
(04-30-2012, 04:26 AM)swbikemedic Wrote:  
(04-29-2012, 07:17 AM)Ian Penna Wrote:  I am replacing my old BB with a Shimano UN26 and can't work out how to tighten the plastic cup on the left side. My tool (UN54) works fine on the chain side but not on the left. I was told at the shop that I just needed to tap the tool to make it fit the plastic cup but after destroying one plastic cup, I am at a loss. Do I need to purchase a specific tool for a plastic cup? I read that the UN26 now comes with an alloy cup that replaced the plastic version.

Very strange the tool should be the same on both sides, have you tried putting a rear QR through the axle to hold the tool in place?

Thanks for suggestion, axle is not hollow. Went back to local shop & bought UN26 tool & no probs. The UN52 tool I had was good for metal side but not quite right for plastic. All sorted now.
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
Schwinn trike NOISE
Today 05:20 PM
Schwinn meridian rear drive axle
Today 04:36 PM
What was your first bicycle?
Yesterday 04:11 PM
Great UK Cycle Camping Map, For E-Bikes,...
Yesterday 05:38 AM
Charging at campground
Yesterday 05:33 AM
Failure to stop at stop sign means $500 ...
Yesterday 05:27 AM
Bicycle enthusiast located in California
Yesterday 04:15 AM
Moving in Style: Beyond Regular Transpor...
Yesterday 01:29 AM
Do you plan or random ride your MTB ride...
11-02-2024 11:43 AM
Cycling is Anti-Aging, But There's a Cat...
11-02-2024 11:36 AM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. enkei
18 posts
no avatar 2. Jesper
18 posts
no avatar 3. GirishH
13 posts
no avatar 4. Flowrider
12 posts
no avatar 5. Talha
10 posts