[sphanna]

I put 5.50R-19's on my Fordor. The choice was between the 500R-19's. I thought the extra 1 /2 inch width would help with stability on worn and groovy roads. I do not know how these compare with the 500's but I was pleased with what resulted. I had plenty of room for the steering rods and have full steering capability. I also like the fact that the tire diameter was almost perfectly the same diam. as my former Firestone 475-500's. This allowed my speedometer to match correctly. As I remember, the 500R-19's had a different mounted diameter which I did not want to let affect my speedo accuracy. On the 550R tire I think the diameter was less than 1/2 inch larger than the Firestone's. THis actually helped my speedometer error as before my speedo indicated about 2% faster than my gps speed. Now they are much closer.