Originally Posted by
brooklyn6640
To improve my knowledge in the matter, how to know if the preload is correct on the caad with hollowgram crankset? and what would be a deep grove bearing thanks
To be honest, we are getting a bit beyond my expertise here so take this with a grain of salt. But...
Regarding the second question, any 6806 radial cartridge bearing you are likely to find that isnt an angualr contact bearing is likely to be deep grove. They have deep “raceway groves where the inner and outer rings have circular arcs centered in the middle of the rings. Angular contact bearings have arcs that run at an angle to eachother so contact the balls differently.
I dont know what preload adjustment capability is for hollowgram cranks but you need to be able to make that adjustment for the spacing in AC bearings to be correct. So I would go with radial deep grove bearings if I were using that crank just because thats what Cannondale specs with their stuff.