'Cross rear spacing

[520 Dan]

What is the typical rear spacing for a cross bike? I figured it would be 130mm, because most crossers use Road stuff, but the Salsa las cruses frame is 135. What gives?

[Trek/VW]

I think 130mm is the standard, but some brands (the MTB brands?) use 135mm. Surly offers a steel frame with 132,5 spacing, that fits both 130 and 135 (bending the steel 2,5mm isn't too difficult).

[520 Dan]

That sucks. Heres my dillema. I'm building a cross bike on the cheap (long story as to why) and its gonna be a single speed. What I'm gonna do is build a flip flop rear wheel that can be transferred to my fixed gear if i ever decide to go geared for cross. The fixie is 130, the salsa is 135. is there anyway I can just put a spacer on each side rather than having to buy a new axle and space it out? Also, I'm getting Pauls fixie hubs.

[Cyco]

The standard is 130mm, but before the genuses (genuii?) at the UCI banned discs many maufactures were moving to 135mm (try finding a 130mm disc hub). This ment many left them at 135, some never got there and some may have gone back.

With the fixxie it is easy, just have a spere 5mm spacer that can slide/screw on the LHS and there should still be enough axle for the nut.