edge

To the old school builders and modifier, has any of you knife edge a Briggs and Stratton crankshaft. I'm in the process of building a 5HP motor and I was wandering has any of you knife edge a crankshaft before?

WTB: New old stock or very good condition,no cracks or dry rot 4 ply round edge front tire. Not one of todays wheel burrow tires. Tires edge must be rounded and not flat as is on a trailer tire. The tire will be for steering off road. Thank you.

I am having a hard time finding a good rounded corner tire for the front that has the thicker 4 ply construction for use by the Baja Mini bikes with 8 inch rim. Does anyone have a favorite that is a heavier duty tire than normal ?