Ugh, you're right. :evil: From memory, the 18" & 19" models shared the same head tube length and the 20-21" were another size. My LBS wasn't ready to handle the fork switch w/o knowing I had another set of headset bearings but I need to dig that fork out of the garage first and confirm what I have. Remember, my original '93 never had the rigid fork mounted because it came with the Rock Shox instead, so until I know for sure, I'll remain hopeful that perhaps Klein might have messed up my order even more and perhaps sent a fork that will fit the 19" frame I now have.