have you considered that putting much bigger forks on your dmr? might make it ride a bit shit/snap the head tube off? I assume you mean combat rim on a new hub? id imagine so unless your hub is already a 20mm with a qr20 adapter which i assume it is, i suppose there safer stiffer and stronger in the long run, you can pick up front hope bulb's etc cheap enough but id probably just gpo for a set of mx comps qr drop out or something, or at max dirt jumpers, which i may have for sale soon . .