cut it with a hacksaw or anything else. like someone else said doesn't need to be perfectly straight for ahead forks - doesn't matter about how it looks either cos it's hidden by the stem/top cap. has anyone used a pipe cutter? I've got one but never tried it on bikes cos assumed it wouldn't cut steel only copper
It should work fine on steel since plumbers use theirs to cut cast iron pipe regularly.
The only caveat with a pipe cutter, is that with a soft material like aluminum, it swells the metal to either side of the cut. Basically, the edge of the cut will have a slightly larger diameter than the rest of the tube after the cut has made. It's easy to correct though. Use a metal file, dremel with a grinding bit or angle grinder to taper the edge back down.
96 Kona Ku
93 Rocky Mountain Blizzard
94 Rocky Mountain Altitude