Old 01-30-15, 09:41 PM
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Originally Posted by RobbieTunes View Post
If you are keeping the tricolor crankset, I think you're fine with 113 all the way to 116. I was not aware the OEM spindle was that wide.

I've stuck many a cartridge BB back in those, and I think the tapered part is simply shorter on the newer cartridge BB's than on the OEM bearing/cup BB's.

I put either a 113mm or 116mm cartridge in my 1987 Ironman (I had it out for a ride today).

For some reason, I thought I used a UN52. I'd send you my UN55, new, but I think it's 123.

Welcome to the forum, and I'm sure you've come across the Ironman thread by now, and seen a few. Love the Purple Haze.
There are a bunch of NOS UN55 113mm cartridges on eBay for ~$22 with free shipping. They are the good ones with alloy adjustable cups rather than the plastic ones.

I put a 113mm or 116mm cartridge in my 1987 Ironman (I had it out for a ride today).

BTW, I've used 118mm Shimano cartridges with Stronglight and TA cranks.


Things aren't always what they seem... Don't believe everything you think!

Chas. ;-)

Last edited by verktyg; 01-30-15 at 09:46 PM.
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