Simply the best way to convert your PF30 frame to accept standard 24mm or GXP style stepped 24/22mm axle cranks.
The beauty of this system over using an adaptor is that the two aluminium cups thread into each other so they lock onto the frame. This offers an extremely secure connection whilst virtually eliminating the chance of the dreaded press fit creak.
They install with 2 x standard 44mm external bottom bracket tools, so are significantly easier to install/remove than a normal pressed in option. Bearing replacement is very quick job on these too.
Frame - Fits into a 46mm Non-Threaded Bottom Bracket Shell. This can be called either Press Fit 30 (PF 30) or Specialized OSBB.
Cranks - If you have a straight 24mm spindle on your cranks choose the Shimano option. (also fits some FSA, Raceface and more)
- If you have a stepped axle from 24mm down to 22mm, choose the SRAM GXP option. (also fits Truvativ and some FSA Mega Exo)
Standard Bearings - These run Enduro ABEC 3 Sealed bearings. High precision balls are within 10/1,000,000" round. Races are hardened to R-62 and polished to a mirror finish with ABEC 3 certification for tolerance and noise.
AC Bearings - Angular Contact Bearings - Made by Enduro, these are specifically designed for Hub or BB applications. A standard radial bearing will typically only have 3 or 4 bearings making contact under load. While Angular Contact bearings ensure that all balls are engaged. This spreads the load over a larger surface area and decreases friction and minimises wear. The balls in AC bearings are withing 5/1,000,00" round. This is military specification. They also have Nylon and Graphite ball retainers that are virtually frictionless and the bearings are filled with Rheolube - a special synthetic grease formulated in the USA. LLB Dual lip groove seals on the bearings ensure they remain clean and working at their best. There is also an additional dual lipped seal on both sides on the outside of the bearing (not pictured) for ultimate protection.