Kieth - I found the 7.50's hard to get and expensive, but the 8.25/8.50's are common - ran'em all around on my 46 1.5T original rims and they worked great - might have prefered radials of that size, but the 8.25 nylon's I found were about 3% used and very reasonable price, so..... go for the ones you can get for a song!
Bill
