Im not familiar with P700 wheel measurements, but if you take your wheel off of the machine and put a straight edge across the wheel lip on the backside and measure straight down to the back of the bolt circle where it would bolt up flat against your hub, that measurement will be the back offset. Then flip it over and lay a straight edge across the front and measure straight down to the same place where it bolts to the hub face. This is your front offset. You wanna order new wheels that have these same measurements. Like if its an 8" wide wheel, and the back measurement is 5" and the front is 3", then you have a 5/3 offset. Im assuming they make the rear wheels wider on offroad toys because the rear wheels are the main drive tires that put the power to the ground and the wider the footprint the more traction you will have. You will notice a lot of machines have a narrower rear axle from hub face to hub face on the rear than on the front, just so they can put wider wheels and tires on the back. This is just an opinion of mine. Maybe someone smarter than me can correct me. Alot of people, myself included, dont like the look of wider tires on the back and skinnies on the front, so they will order 4 wheels with the same offset, and 4 tires the exact same size and put them on the machine so everything is the same. Sometimes when you do this you have to get wheel spacers on the back to bring the back wheels out the same diatance as the front, because of the narrower rear end that I talked about earlier. My wife had a 2015 Pioneer 700-4 for a while and I ordered 4 matching wheels and 4 matching tires. Honestly though, for the life of me I cant remember if I had to put wheel spacers on the back or not.