tubby74 wrote:slightly off on a tangent - I've got a road bike with the top tube caved in, everything else is fine and was looking to get a frame and use the parts for a commuter bike. I could just get a road frame but a rack is a requirement for me, and so CX frames seem to be the way to go. Looking at the likes of the planet uncle john, but none seem to fit caliper brakes. Is there such a beast with rack and caliper brake mounts? not too fussed on mudguards. can cantilever brakes fit to road levers?
The key definition of a CX bike is the ability to run big knobby tyres, loaded up with mud.
You can't fit such a tyre through a caliper, so CX bikes universally run cantilever (or now disc) brakes.
As an aside, many CX bikes also have rack mounts.
You can get road bikes and CX bikes with and without rack mounts. The rack mount does not make it a CX bike. Granted, there are more CX bikes with mounts than there are road bikes, but road bikes with rack mounts exist.
They're out of production now, but something like a Salsa Casseroll
immediately springs to mind.
Or a Kona Honky Tonk
, which is still in production.
That style of bike is more often than not going to be made of CrMo steel, because that's something the target niche of riders are into. But there are also alloy (and probably carbon) options if you look for them.