March 07, 2010, 12:35:52 pm"It's the 350 fender using 500 fender stays."
Of course! Why didn't I think of that? I could've tried using those longer stays to accommodate a 3.50-19 in my '79 350's big front fender. It has enough room only for the stock 3.25-19 but with longer stays... Next time. Oh, you've got me shaking! I want to try it now!!
By the way, do you have an up close photo of the tyre/tyre tread? Would love to get a better look at that rubber. Do you really experience any benefit?