Originally Posted by
Philasteve
That's an excellent choice, very good quality at a very reasonable price. I was going to suggest the IRD QB-55 that is the same price but lighter weight, but unfortunately it is out of stock at RG.
The reason the Shimano BB-UN55 won't work with your frame, is that it expects the frame's BB shell to be exactly 68mm wide, and yours must be just a tiny bit less, resulting in the gap. It's really a very stupid design, and I think you are wise to get something else.
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