Many cranks have spindles long enough for BBright. It's just the short spindle BB30 ones that don't fit.
will pair them w rotors ceramic BSA bearings.
Not what I was gunning for but its getting me exited all the same - i love new gear! cant wait.
Yeah, that it a valid point but that argument is not quite as valid when you are talking about mating a 'hollowgram SRM' on a time trial bike with a BSA 24 bottom bracket shell and have even considered having the alloy insert in the carbon bottom bracket shell machined to accept PF30 bottom bracket.bricky21 wrote:I just don't get the continued fascination with mating a Hollowgram to a BSA BB
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Again, all cojecture but sounds like a Cannondale Hollowgram 122mm Mountain Spindle with the ridge machined off would solve that problem.thisisatest wrote:using the 109mm spindle... you are still about 2mm short. The left arm will contact the lip of the pf30 cup.
The math on BBright and hollowgram was that the 104 spindle was 11mm short on the non drive side...
So the new spindle is 109 and the bearing races on the spindle are bigger and at the ends of the spindle
So now we are 6mm short and it can come from either side....
Dropping the shields gets you 4mm so we are looking for 2mm more
You have to leave the 2.5mm SL2 to keep the chainline perfect, however wave washer and "up to" 1.5mm of spacers on the non drive side implies that that there might be 2mm of "wiggle" room/tolerances.
What if you don't install the bearing shields and and the BB30A spacer? anybody know how wide the BB30A spacer is? Is my math right? Are the tolerances really this tight?
http://media.cannondale.com/media/uploa ... r_1012.pdf
Q. What is the difference between BBright™ and BB30™?
A. For the crank, BBright™ uses the same diameter axle as BB30™, with the addition of 11mm length on the left side of the spindle, and the left crank is straighter, (similar to existing arms for external bearing cranks).
Just putting a BB30 crank on a longer spindle will put the NDS pedal 11mm to the left, and increase the Q factor as well as making it asymmetric.
It requires a different, actually more conventional, shaped NDS crank.
How many drivers does a buggy have?
So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.
What's the history of that custom bottom bracket? Who made it and sold it? Curious why they don't keep selling it after investing time and cost into the custom bb. Why not keep selling it to keep recouping some of the costs?
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