IS42/28.6 | IS52/40
Bearings: Cartridge ball Bearing
(Economic bearings)
41.8 x 45°(R430) Upper
51.8 x 45° x 7.5H(R440) Lower
Material: Top cover: AL6061
w/ alloy crown race
Height: 8.8+1=9.8mm (top cover H:8mm )
PT-1860ES Crown race ø30mm for 1-1/8" straight steerer
click for drawing - PT-1860E
click for drawing - PT-1860ES