Originally Posted by
TrojanHorse
Well, the BB shell is narrower than the new BB, so threading isn't an option.
How does that press kit work? Sounds intriguing!
It's irrelevant. It won't work. It's basically a shimano external bb, without the cups. With the bearings pressed into the frame. BB90 frames were designed specifically for that bearing size.
BB90 = 6805 bearings size 25x37x7
OP's BB = 6903 bearings 17x30x7
Dimensions nowhere close to being compatible.
Originally Posted by
TLCFORBIKES
The Park "Shimano Press Kit" -- BB90 -- may work -- maybe. The first gegeration Merlin frames came with a BB shell that was way too small to fit the kit. The next version may fit because I do not know what the measurements of the shell is. I do know that the BB shell appears to be smaller than a standard shell diameter. If it is the same as a Standard/English BB shell then you might have a soluton. Good luck.
I guarantee you it's not going to work. Especially with info from the op in his above post. The 6850 bearings that are standard on shimano ext bb's are larger than the english shell. That's the point.
OP: If you can obtain different axle lengths and install them you may find one that will give you the appropriate chainline for a campy crank. The taper is probably not the same either -