Im switching to cervelo and have some questions about the bbright system they use. Ill be buying a frameset and using my current parts. Excuse my ignorance when it comes to this. feel free to poke fun and use lots of pink as long as you answer my question
Questions:
Does the bbright bottom bracket come stock/already in the frame with all bbright frames or do I have to buy one separately?
I’m wanting to use my shimano da 7800 crankset. I know ill need to buy a bbright adapter for it…is there anything else Ill need?
Does the bbright bottom bracket come stock/already in the frame with all bbright frames or do I have to buy one separately?
I don’t believe so. BBs come wth cranks and most cranks have propretary bottom brackets.
I’m wanting to use my shimano da 7800 crankset. I know ill need to buy a bbright adapter for it…is there anything else Ill need?
I think the DA crank can be used but you will need an adapter. the adapter should come with all the necessary parts, although there may be more than 1 type of adapter.
That’s basically a reducing sleeve that fits into the BBRight bearings and reduces the diameter to fit a Shimano crankset and then has a set of shims to take care of any width issues and eliminate excess play.
Whether your Cervelo comes with the BBRight bearings installed or whether you have to install them depends entirely on the dealer and how the frameset is packaged for sale much like the question of whether the frameset includes the headset at time of sale.
FWIW I use a similar PF30 to Shimano reducing adapter on one of my bikes and it’s a very simple and effective solution that doesn’t creak or require adjustments or basically do anything other than allow a Shimano crankset to be used with oversized bearings.
So all ill need is the bbright bearings and an adapter similar to the link posted? No other bottom bracket or other parts needed? Trying to get a grip on this… Thanks dave.
Yes, technically you’ll still be using the bbright bottom bracket in the sense that those are the bearings that will carry the load and spin around. The adapter is just a way to make your smaller diameter Shimano crank spindle fit snugly into those much larger bbright bearings. So there’s no extra bottom bracket, not a second set of bearings spinning inside the original bbright bearings or anything like that.
As mentioned in an earlier post there are a host of different adapters between the new generation of oversized bottom brackets (BB30, PF30, BBright, etc.) and in some cases, like adapting a BB30 to an older style standard 68mm English bottom bracket you literally mount another bottom bracket inside the adapter but that’s not the case with adapting to cranks like Shimnao Hollowtech II or SRAM that already have an integrated spindle. In that case all the adapters do is reduce the 30mm bearing dimensions down to fit the 24mm spindles, so the ‘adapters’ are really just simple reducing bushings with no moving parts and the supplied shims just make it easy to deal with various combinations of BB shell width and crank spindle length so things are snug enough without excess play. But basically they’re very simple reducers that allow the 24mm spindle from your Shimano cranks to fit properly into the large bearings of the bbright bottom bracket.
