Singlespeed & Fixed Gear - campy bb question...

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travsi
07-31-05, 09:27 AM
recently i got some new sugino 75 cranks to replace my gipiemme strada cranks. when i put the suginos on the campy bb i noticed that they don't sit as close the the bb shell as the gipiemmes. is this because they have a different taper? and is this going to change the chain line?

absntr
07-31-05, 10:12 AM
Campy BB and JIS taper (sugino) do not mix! Take em off! You might mess up the tapers. You want to get the correct BB for the Suginos - they of course have a matching one though I'm running a Shimano 107 with mine which works fine.

Campy = ISO

Sugino = JIS
r-dub
07-31-05, 03:43 PM
prolonged use will definitely damage your cranks (steel spindle into poorly fitting aluminum cranks = messy!) Any shimano/tange bottom bracket should have the correct taper (provided it's not *gasp* ISIS spined.)

travsi
08-01-05, 05:19 AM
...crap i didn't know that it would be that much of a problem...guess i need to get an njs bb or just get some nice campy cranks... i'll put the gipiemme back on. thanks for the infos.
trespasser
08-01-05, 12:48 PM
just to make few things clear, their taper angles are same, 2 degrees. but jis are slightly bigger than iso, so usually when you put jis taper cranks on iso taper BB, they sit further in, sometimes bottoming out. from your description, your gipiemme cranks are worn, and maybe bottomed out, so check that as well when you install them.
travsi
08-02-05, 03:35 AM
could it also be that the gipiemme cranks are meant to take on more spindle? is the amount of spindle that goes into the crank a standard lenght?
trespasser
08-02-05, 06:12 AM
could it also be that the gipiemme cranks are meant to take on more spindle? is the amount of spindle that goes into the crank a standard lenght?

I don't know if there's standard for it, but from my experience, it seems they more or less have same taper engagement when new, with appropriate BB.