I bought these for the front of my quad for mx racing. I would not recommend using these on the back if you are doing any jumping could they might flat spot depending on your tire pressure and how big of jumps you take. They have a rolled inner and outer lip for durability and that also helps allot if you install your own tires like I do. I mounted both front tires by hand in under 5 minutes. The bolt pattern is stamped on the inside of the wheel so you know you have the correct wheels. You will not find a cheaper wheel on the market. These wheels are a great price and are just as good (and better in some ways) as other wheels I've owned from other wheel companies. Very happy and would buy again.