I need to replace my bottom bracket, but need a little advice. I am replacing a TH Industries 7420AL in which one of the races disintegrated. I went to my bike shop and asked for a 68x118, which is what I understood to be the right unit for the BikeE. They sold me a Shimano UN73 Cartridge BB and said it was 118, but it is longer than the one I took out. I think it is a 122 and mine is 118.
Is there any problem with putting a cartridge in as a replacement for a non-cartridge?
Does the extra length hurt anything or do I need to track down a 118? There is only one chainring on the crank.
Is the UN73 a decent unit? It's on a long wheel base recumbent.
Any tips for when I put it back together? Is grease good or do I need antiseize?