Many of you have seen my Quattro Assi build - with Carbon bits hanging all over it:
Well the carbon brakes pads have worn so I thought it time for a tear down and rebuild - and to finally get rid of the last large bit of chrome on the bike - the Shimano 600 Headset.
I ordered a sealed bearing Origin 8 headset in black and ran into trouble when I went to thread it on. The crown race seated perfectly, the cups pressed in perfectly - but the threaded cup and the top nut will not thread on.
Sheldon's headset site says there was an Italian headset with a different pitch - but he said the standard headset would thread on?
Some facts:
- 27.2 seatpost
- Oria RANF tubing
- I suspect the frame to be an 1990/91
- Possibly built in the Tommasini factory
- 26.4 crown race
Here is a shot of the Shimano 600 that threads on with ease:
Here is a shot of the fork threading:
And a shot of the Origin 8 headset:
Anyone have any ideas as to what is going on here? This is a first for me... THANKS!!