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The 799 is a 47mm reamer for cutting the lower head tube on frames using an IS47 bearing for a 1-1/4" integrated headset
It also eliminates any noise from items in the bag hitting the rack
Precision 3
The BB-UN300 square taper bottom bracket was launched by Shimano as successor of the models BB-UN26 and BB-UN55
Praxis - M30-THRU BB30/PF30 Bottom Brackets for 30mm Spindle Cranks S3-Cat-TyresTubes&Sealants-Tyres-26"-Wirebead The 799 is a 47mmPRAXIS M30 THRU BB30 PF30 BOTTOM BRACKET FOR 30MM SPINDLE CRANKS The M30 THRU bottom bracket family is for Praxis' carbon LYFT MTN crank, but can also be used for third party cranks like the Race Face Easton Cinch MTN cranks, Rotor Rex1 MTN cranks, and others such as the Cane Creek eeWings. This design uses 30MM Drive bearing and a 30MM Non Drive bearing. Bearing preload is set by the cranks' preload adjusting ring. 30MM drive bearing 30mm non drive
