I would like to get new wheels for my 08' night train. The stock wheels are 21x 2.15 on the front and 17 x 6.00 on the rear. I would like to keep my stock tires since they only have 1,000 miles on them. I have looked at many after market wheels. I found many offer a 21x2.15 for the front, so no problem there. On the rear I found 17x6.25, which is a quarter inch wider than my stock rear wheel. Can I use the 17x6.25 on my bike with the stock rear tire? Not sure if the quarter inch is a big deal. Should I go up to an 18 inch rear and buy a new tire?