Praxis M30 Thru BB Conversion (BB30/PF30) 73mm MTBThe Praxis Works M30 Thru bottom bracket features a patent pending threaded design that eliminates the common creaking and tolerance issues found in BB30 and PF30 mountain bike frames. By threading the drive cup directly into the non drive cup, the internal collet system expands to create a rock solid, even fit. This unique construction keeps the premium Enduro 6806 cartridge bearings positioned outboard, significantly increasing frame rigidity and