Cut outs in the BB shell are for water to drain out and not in.
The only worry you'll have without a sleeve is water ingressing through the seat tube, and bottle cage bosses (if you have them fitted). And obviously if you wash the bike upside down!
Just use it without until you find one. And when you do, clean and regrease the bearings for peace of mind.
Cut outs in the BB shell are for water to drain out and not in.
The only worry you'll have without a sleeve is water ingressing through the seat tube, and bottle cage bosses (if you have them fitted). And obviously if you wash the bike upside down!
Just use it without until you find one. And when you do, clean and regrease the bearings for peace of mind.