FIRST Spurs SI 1-1/8" IS41 Headset Handmade all whilst maintaining the material

all whilst maintaining the material hardness of JIS standards

you've just found it my friend

70mm length for rim profiles between 31 and 60 mm

The common issue with most track nuts is that the thread starts too far from the flange leading to poor engagement on wheels where axle length is an issue due to the frame

Mount and inflate/seat tyre without sealant

FIRST Spurs SI 1-1/8" IS41 Headset Handmade all whilst maintaining the materialINCLUDES 2 x Sealed Bearings (Paired) 1 x Star Nut 1 x Top Cap 1 X Compression Cap 1 x 0. 25mm Shim 1 x Crown Race Lower 1 x Bearing Race Upper BEARING SPECIFICATIONS Upper 30. 2 x 41 x 6. 5mm 36 Inside x 45 Outside 28. 6mm Crown 30. 2x41x6. 5 36x45 Lower 30. 2 x 41 x 6. 5mm 36 Inside x 45 Outside 30mm Crown 30. 2x41x6. 5 36x45 Headset Compatibility FSA Orbit IS 2 IS41 Not sure on if this suits? Here are some part codes of bearings from other