New to dual sport

[WudzRydr]

Right, sorry, got lost in the thread. I've seen many DRZ400s running 17/17 knobblies but I don't know if you can realistically run a rear up front. As for bolting on 21 up front, I believe you'll run into limitations of the DRZ front fork, brake, etc as your version of the bike is different than the dual sport. Maybe someone has done it with positive results, I'm not sure but check on advrider.com

Drz s wheels bolt right on. Just use the rotor from the sm wheels and gear the rear the same as the s.

Been there, done that.