Benotto 800 BB size halp.
07-17-10, 09:55 AM
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Benotto 800 BB size halp.
I'm trying to replace the completely mauled cup & cone bottom bracket on my Benotto 800 with a sealed cartridge bb. The axle says 3P, so I used Sheldon Brown's size chart to figure out that I likely needed a 68x122 bb.
I got a Shimano 68x122, but it slipped straight through (didn't catch on anything). I'm somewhat perplexed now. It's a 58cm frame, so could it be that I need a 73? It seemed to slip through too easily to be Italian (70)...am I just completely wrong? 122 seemed to be correct from eyeballing it (am I wrong there, too?).
Wasn't sure if this should go here on in the Mechanics forum.
I got a Shimano 68x122, but it slipped straight through (didn't catch on anything). I'm somewhat perplexed now. It's a 58cm frame, so could it be that I need a 73? It seemed to slip through too easily to be Italian (70)...am I just completely wrong? 122 seemed to be correct from eyeballing it (am I wrong there, too?).
Wasn't sure if this should go here on in the Mechanics forum.
Last edited by nepg; 07-17-10 at 10:37 AM.
07-18-10, 09:42 PM
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My Benotto 800 has an Italian BB shell, I suspect yours does too. An English BB is about 35mm in diameter and an Italian BB is 36mm; if the English BB slipped through this might also point to an Italian BB shell.
