Quote:
Originally Posted by TIGGER
Maybe,I have a 190/50 on it now ofcourse. This is a VERY stupid question but here goes... shouldn't the 200 be taller? Bear with me,the rim is 6",if you take a 190mm line and make an arc from lip to lip and a 200mm line and make an arc,wouldn't the 2nd be a "taller" arc? Plus,some of that 200mm goes to side walls doesn't it? I actually understand car tires reasonably well,but mc tire specs have always confused me alittle....
For example, a 300/50-20 car tire (just a #) has 300mm from bead to bead and 50% of that distance is sidewall. Thus the sidewalls are 75mm each and the tread is 150mm..right? Obviously,the same formula doesn't apply to a mc tire as the "sidewalls" are significantly less that 50% of the total bead to bead length of the tire. I don't know...anybody?
|
Not sure about bike tires... but you are slightly off on the car tires
a 265/55R18 car tire is 265mm across the tread, the side wall is 145.75mm tall (55% of 265) and it fits an 18" rim.
I'm thinking a bike tire say 190/55R17 is going to be
190 mm edge to edge on the tread
side wall would be 55% of 190 = 104.5
and run on a 17" rim.
