fire mountain
Looks like an 1" 1/8 but i'd check as am pretty sure its not a '97 due to cantilever brake cable stop, this is not a bad thing tho, this is a good thing as it means its even more retro. having said that my 95 kilauea had a kind of cable clamp thingy on the seat tube but didnt have top tube cable routing so have no idea as to what age it is.....