Quote:
Originally Posted by SuperJ
tire is a marathon 180x55zr18, so i need to go maybe one size narrower. So are all 180 tires same width?
Thanks for help
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No...all tires are not the same width, despite having the same size printed on them. Tire manufactures are required to stay within a 7% margin of accuracy, so from one brand to another, you can have as much as a 14% difference in width or height.
When I raced, Dunlops were always taller, where as Pirelli and Metzlers were always wider on 190-55x17 models, and we'd use that to our advantage at times.
Like cracker said: The wheel can be moved over to the right slightly, but changing the spacing and shaving the brake caliper mount is necessary, as long as you have the proper fender clearence to move it over.