Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 45 Post(s)
Tagged: 1 Thread(s)
Quoted: 1730 Post(s)
Based on the vintage, and assuming a steel OEM quality headset, I'd expect them to be 5/32" balls. More modern or better quality headsets would use 3/16". Balls are cheap enough, that I'd make a calculated guess for one or the other, or splurge for a small package of each.
You can't mistakingly use the wrong size balls because it'll be obvious. If you're not sure load the top race and test it against the upper head cup/cone without the fork to see if the overlap looks and feels right.
An ounce of diagnosis is worth a pound of cure.
“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“One accurate measurement is worth a thousand expert opinions”
- Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance