This BB is done?
- Thread starter Lauris
- Start date
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I am currently looking at this.
https://www.evanscycles.com/brand/s...e20983f0d56d13d60be7a1e02b&fo_s=rakutendispgb
It says 122mm, but don't know what that's for. I don't what size I need
https://www.evanscycles.com/brand/s...e20983f0d56d13d60be7a1e02b&fo_s=rakutendispgb
It says 122mm, but don't know what that's for. I don't what size I need
cyberknight
As long as I breathe, I attack.
- Location
- Land of confusion
the second one will not work with your crankset, you need a square taper BB, as far as length goes if you cant see it on the old one due to corrosion etc just measure it from one end to another
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cyberknight
As long as I breathe, I attack.
- Location
- Land of confusion
as far as i can tell from your piccie its a un 26 BB
https://www.sjscycles.co.uk/bottom-...l-square-taper-bottom-bracket-english-thread/
Found it!
Although I don't want to replace like for like, would want same type of BB but with an upgrade!
So as long as the dimension match I can buy any right?
cyberknight
As long as I breathe, I attack.
- Location
- Land of confusion
as long as its 68 mm , same length and thread yes
ColinJ
Puzzle game procrastinator!
- Location
- Todmorden - Yorks/Lancs border
Make sure that you clean up the threads in the bottom bracket shell before you fit your new BB!
If you take it to your local bike shop they will re tap the threads, new BB will then fit just like it did when the bike was new.
cyberknight
As long as I breathe, I attack.
- Location
- Land of confusion
if you do it yourself make sure you grease the threads of the frame. i also put some grease inside the non drive side cup where the BB goes in it ( if thats makes sense ) as i have had BB creaking there before now.
Cycleops
Legendary Member
- Location
- Accra, Ghana
Although it's rusty on the outside housing it may be ok inside. Turn it see if you feel any roughness. Ideally you should try that when it's in the frame with a crank attached and feel for any play when moving it up and down. A small amount is okay.
Those threads in the shell should be fine once cleaned up with a wire brush and treated to a bit of grease.
Those threads in the shell should be fine once cleaned up with a wire brush and treated to a bit of grease.
Ajax Bay
Guru
- Location
- East Devon
Shimano's best offering (@£20) for a square taper BB is the UN-300 (UN-55's replacement). OP needs an English thread and can measure the spindle on the extracted BB (well done for getting that out btw).
The extracted UN-26 is Shimano's lower model and the current version has a plastic threaded part on the left side (which is prone to failure).
I have just bought a Stronglight JP400 BB, and on cursory examination looks made to the same standard as the UN-55s I have:
https://www.spacycles.co.uk/m16b0s110p140/STRONGLIGHT-JP400-Aluminium
Spa Cycles is an excellent shop.
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