Raise your hands if you’ve ever installed a new bottom bracket and it didn’t spin as freely as you’d like. OK, now raise ‘em if you’ve ever had creaking in your BB. That everyone? We thought so.
And so did Wes Wolfenbarger and Gary Mailhiot, Jr., founders of BBinfinite. Especially peeved after Gary’s brand new $6,000+ Wilier Cento1 road bike came with cheap plastic adapters to fit Campagnolo crankset to the PFBB386 frame, they decided to do something about it.
“What we found was that pressfit frames, while technically built with a 46mm inside diameter BB hole, had a wide variance of actual measurements,” Wes told us. “Those measurements could only be off by 1/1000th of an inch, but when you add up those variances across the frame and inside and outside diameters of any plastic cups holding the bearings and adapters to fit various crank spindles, you end up with enough to wreak havoc on bearing performance. It can cause too much compression and/or ovalization, which adds friction to the system.
“Then, if a frame’s left and right cup interfaces weren’t 100% in alignment, you could end up with very slight misalignment. Once the crank spindle is forced into a misaligned system, that’s putting uneven lateral stresses on the bearings, which adds even more friction to the system. Put them together and you end up with a crankset that spins poorly and sucks power.”
And to add insult to injury, all of that can lead to mentally debilitating creaking that seems impossible to resolve. Their solution? A one piece bottom bracket module that ensures absolute precision alignment and a perfect fit in the frame…