Join Date: Mar 2008
Location: Montreal Quebec, Plateau
Bikes: 91 bridgestone rb-2, Univega viva sport, 04 masi Nouva Strada,Dave Scott Ironman, Changes like every month
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75s will "work" on any number of sealed bbs. But if you've owned 4 sets you probably already know that. The particular bb you're talking about is the 103 mm model made for the rd cranks. It may place the crank too close to or contacting your frame, especially with your apparently heavily worn cranks (especially if the part that interfaces with the axle is worn). I used a shimano 110 for a while, worked OK. Now I use a campy Mirage, which is a surprisingly much better bb. Cheap cartridge bbs are just that, cheap.
They are never really that smooth to begin with and they never get much better. That said if you're not riding in truly crappy, salty conditions they are serviceable for quite some time.
Can we end this thread now?