1 1/8"-1.5" Internal Headset
PT-F13E
ZS44/28.6 | ZS56/40
1-1/8" Upper / 1.5" Bottom
Ø28.6 * ID44 * ID56 * 39.8
Height:9.3+ 3= 12.3mm
Bearings:Cartridge ball bearings
41 * 7.7 * 45° (R431) Upper
51.8 * 7.8 * 45° (R440) Lower
Material:AL6061-T6 top cover w/ steel cups & crown race
Finish:Anodized + EDBK
Headtube:OD50mm * ID44mm / OD62mm * ID56mm