hello, I was just wondering if all brands of fixed rear wheels can be spaced or are there some wheels that spaced only to a certain extent ie 126mm max and no further. thanks

they can pretty much all be spaced depending on axle length (if you have the regular nutted axle). if you find your axle on the current hub is too short all you have to do is replace it with a longer axle and respace accordingly. with hubs that have allen keys as a tightener (Phil hubs) you have to buy the special part for the hub