Bike: 2018 RLT RDO.
Bottom bracket interface: PF30-68mm shell
Crank: SRAM Force CX1 46t BB30
Purchased as an apex build, stripped it down and put all Force and Red components on it. Pretty awesome ride. After about 1500 miles, the stock SRAM PF30-BB30 drive side crank bearing locked up after a ride in wet conditions. This was the stock bottom bracket. I popped it out of the frame, knocked the bearing out of the plastic/cup and took some measurements to see if it was something I could replace since the non-driveside bearing was still silky smooth. This bottom bracket was great, and never made a single creak/noise for the 1500 miles of service. Turns out, the drive side, uses a proprietaty SRAM bearing that is 43.5mm diameter, 31mm inside diameter, and 7mm wide. Sram provides the shim/seal that snaps into the bearing, making it 30mm ID on the driveside. Anyway, the special bearing is not available anywhere so im forced to buy a new BB for this bike.
Im going to purchase a wheels MFG threaded PF30-BB30 bottom bracket. I plan on installing it and never taking it out of that BB shell. For service, I will be tap the bearings out and replace those readily available ones as needed down the road. Here are my following questions that I have for you experts out there?
Pertaining to the carbon PF bottom bracket….
Do you prefer using something that is a little more flexible for a shell to press in? like the Delrin/plastic SRAM solution?
Do you use pipe thread compound at the carbon/shell interface? Any threat to the carbon/resin over time?
The bike shop said I should use “carbon safe” grease…. Would a off the shelf moly grease or heavy duty lucas grease cause damage to the frame?
Im not a carbon fiber materials expert so i would like to ask for someones in depth opinion on this.
I am planning to install the wheels mfg bb with some free “carbon safe” grease the guy at the bike shop said he will give me and reply back in 3-4 months to give a report back on the status.