If you want BB30 bearings I don't think you could do better than these. I used to have SRAM ceramic bearings. They spun no smoother and freer than these and didn't last as long. One thing I do and you might consider adding some lubrication on a regular basis as the bearings aren't well protected in the BB30 design. I do this every few thousand miles or sooner when driving on wet roads. Remove the crank, pry off the outer seal with a thin blade, apply some light grease with your fingertip and reassemble. Lager you will love for a long time.
FKG 99502HNR Bearing Width Pre Lubricated
5 Review
Enhanced Performance Sydien SCS12UU Bearing Bushing Diameter for Precision Machinery
4 Review
π Wheels Manufacturing Ball Retainer Bag: Convenient Storage and Protection for Your Ball Retainers
6 Review
π§ High-Quality TIMKEN 6203 2RSC3 6203 2RS Bearing - Size: 17X40X12mm
4 Review