BB for my Kona

[wilkij1975]

I need to get a new BB for my old Lava Dome and have found a Shimano UN54 (I think!) on several websites. The thing is, I am a bit confused with the numbers :?

They are listed with two numbers. The first I know is the BB shell width (68mm or 73mm) but the second i'm not sure of. They have numbers from 110, 113, 115 up to something like 125. What is this number relating to and how do I know what one to get?

 

[Jones]

Its the length of the axle, the length you need depends on what chainset your using

 

[JeRkY]

If you are simply replacing an existing unit. easiest way is to measure that one first.

 

[wilkij1975]

I thought it might be the axle length. I have binned the old one but on the spec sheet for the 94 Lava Dome I found on here, it says that the BB is 115. So I just need to measure the BB shell and get an ?? / 115.

Cheers

 

[davegt]

When I did the BB on my 1993 Lava Dome it was a 73mm width.

Hope that helps

 

[Mr Panda]

When I did the BB on my 1993 Lava Dome it was a 73mm width.

Hope that helps

Was it really? I would have thought 68mm :? All my Konas of that era (1988 - 1995) are 68mm.