REPOST Enforcement Mod
Join Date: Feb 2006
Location: Wesley Chapel, FL
The numbers you're looking at are the size of the tire. The first number is the width of the tire in millimetres. The second number is the height of the tire in percent of the width. So a190/55 is 190mm wide (roughly) and 104.5mm tall (190 x .55 = 104.5mm).
The taller the tire, the rounder the profile in most cases. If the tire is flatter, it will not transition as well. There is some variation due to the manufacturer's not this is not a guaranty. A Dunlop will feel different than a Pirelli of the same size. They won't even measure the same in actuality. But it's pretty universal that a 190/55 class rear is better.
The other thing is if using a smaller rear, the rear will be lower down. This changes the geometry of the forks. It will increase trail and reduce rake. Both will cause sluggish stearing in most cases.
The contract patch will also be affected. As is the weight. The only advantages of a smaller size tire is really the lower rotational weight and the effective change in gearing. Because of these things, the smaller tire will accelerate slightly quicker. Again, good for drag racing.
I may not be perfect, but at least I don't ride a Suzuki.
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