I'm going to have some wheels made, and I'm hoping to use a 19.5 as it is the closest to stock AND the company I'm having build the wheels will use the original wheel faces and add the new rims to them...great. My question is this. What is the largest, NARROW, tire available. I'm hoping to get something simular to the 8.25 x 20 tire....can I do this in a 19.5? Any experience and help in this department would be appreciated. Thanks, Tom