Joined: Jan 2008
Posts: 23,642
Likes: 1,106
From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
Most likely a 26.4. Fortunately for me, I keep a handful of headsets in hand of various sizes. Remember stack height too, that can change everything. The bike I had above with the 26.2 crown race also had a very short stack height.