Geoff, why do you mean that the Suntour XC Compe pedals comes out in 1985? Have your pedals a date code? I'm thinking that these pedals comes out in 1981, take a look in the pedal museum.
I’ve seen that... As well as Jeff Archer’s MOMBAT timeline and various catalog and spec pages ( http://mombat.org/MOMBAT/history.html
). I think the Speedplay site is wrong on this one. If you look at all the early MTB specs, most were using Suntour BMX (MP-1000) or MKS BM-7’s. Folks with lots of cash might have gone with Campagnolo BMX. Beginning in 1983, you see references to the big Suntour XC and later XC-II “beartraps”, but those don’t really work with toe clips/straps which I know were part of this bike when it was originally built up.
Unfortunately, I’ve never seen Suntour pedals of this era with any sort of date code (like their derailleurs have). The MP-1000 was offered with 9/16” spindles and is VERY similar to the (I think later) XC-Compes PL-5700, but there are minor differences.
Heres a pic of (left to right): the XC-Compes that were on this Potts, an NOS set of I believe identical XC-Compes, an NOS set of the BMX MP-1000’s.
I’d love to find some definitive confirmation that XC-Compes were available in December 1983 (when this bike was first built up), but barring that I’ll probably use one of the alternative models mentioned above.