Originally Posted by
Kontact
I think you can kind of tell by looking, and then use catalog websites to confirm. Or ask here. But the oversized head tubes were proudly listed in catalogs at the time.
Look at pictures of both kinds and get a feel for the fatness of the quill and the headset.
So I found a 1991 (maybe 92) M2 Stumpy in museum piece quality -- purple! -- and I'm stoked to grab it, but it's a bit of a schlep to travel for it.
AFAIK, all of the suspension fork models are 1 1/8" without fail. Safe to say the same goes for the rigid fork M2? I'd post the link but I can't yet due to my forum post count. It's on page 4 of the 1991 Specialized catalogue on Retrobike. Looks just like it, too, like it hung in a storage unit for 30 years.