The only wheel spacers I found that actually work on the 170 are these from UTV inc. As you can see from the pics the 170 has a raised edge, meaning an after market aluminum rim will not fit flush on the hub.. UTV Inc has machined a recess to match the 170’s hub. So to put after market rims on you must get these, this is a must and no alternatives exist period. (At least that I could find). I used 5-2 back spacing on the front rims to get what I wanted. Also the center part of the hub that sticks out is to big to fit in all the rims I was looking at, so the spaces solve that problem as well