Looking for Guidance on Replacing Bottom Bracket on Vintage Bianchi : bikewrench
The Silicon Nitride that is used to construct ceramic bearings can be machined to a far greater accuracy, increasing durability and reducing any manufacturing imperfections. Spindles for Italian BBs are therefore 2mm wider between the bearing race areas than those for English. Many Italian bikes are supplied with English BBs. Kona frames are no different from any others when it comes to BB removal. It yields a hollow crank arm and spider with an I-beam down the length of the arm: FSA ensures that as well as meeting or exceeding CEN Certification standards, our in-house testing procedures continually push the safety and performance capabilities of all products. This has to be fixed at the drive side.
There is absolutely no way I would ever have got it out. Not all brands do this. You see, most bike frames are painted. FSA manipulates a single block of high grade aluminum to yield a hollow crankset with superior strength to weight ratio — we call this Hollow Forged Technology. The cup will have very little strength if you've done 1 and 2 properly, and may collapse as soon as you apply pressure.