What size BB axle?

Andyrich46 · Aug 26, 2017

Hi, I have a 1996 Saracen Backtrax and the bottom bracket axle has just started make crunching noises.
I have managed to remove it but it does not state a model no on it nor the length.
I have looked in the archives and all it states is its a sealed one.
Can anyone help me please.
Many Thanks
Andy

legrandefromage · Aug 26, 2017

have you tried measuring it?

measure the axle lengthof the current BB

measure the frames' BB shell

then start looking for replacements

Andyrich46 · Aug 28, 2017

Hi everyone, i done some measurements and BB shell is 68mm, axle length is 127.5mm
and the one i need is a Shimano UN52 as it has a triple chainset.

FluffyChicken · Aug 28, 2017

The make/model doesn't matter.
The 68mm shell and 127.5mm axle length are the important parts.
What crank model is it ? Still the MA61 that the catalogue says, think that's a cheap generic thing (not Shimano ?)

Either way the Shimano UN55 is the current model
http://www.chainreactioncycles.com/shim ... -prod71369
and where ever else sell it or saya UN26 or similar.
You'll need the tool too, if not already.

What size BB axle?

Andyrich46

Dirt Disciple

legrandefromage

Andyrich46

Dirt Disciple

FluffyChicken

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