1.5`

 Aluminum construction For tapered 50mm/57mm head tube 1.5 alloy external cup with 36?/45? ACB sealed 1.5 bearing lower EC49/40 Black 28.6 50 40 36?/45?&n...

 Aluminum construction For tapered 50mm/57mm head tube 1.5 alloy external cup with 36?/45? ACB sealed 1.5 bearing lower EC49/40 Black 28.6 50 40 36?/45? 1.5`UPC/EAN/GTIN: 400310027429

 External cup lower headset for 1.5` or tapered steerers 1.5in 36 degrees/ 45 degrees ACB  EC44/39.78 Black 50 40 13.4 36?/45? 1.5`UPC/EAN/GTIN:...

 External cup lower headset for 1.5` or tapered steerers 1.5in 36 degrees/ 45 degrees ACB  EC44/39.78 Black 50 40 13.4 36?/45? 1.5`UPC/EAN/GTIN: 400310028082

 Fits tapered headtube 1-1/8` top-1.5` bottom 36?/45? ACB sealed cartridge bearings ZS56/40 Black 28.6 62 39.8 36?/45? 1.5`UPC/EAN/GTIN: 400310027160 ...

 Fits tapered headtube 1-1/8` top-1.5` bottom 36?/45? ACB sealed cartridge bearings ZS56/40 Black 28.6 62 39.8 36?/45? 1.5`UPC/EAN/GTIN: 400310027160