Quote:
Originally Posted by morphius909
hmmmmm really?
Okay I thought it was two fold...width...which we agree on...and...
Rolling diameter(space from tire to fender)....did NOT know it was similar...
Learn something new every day!
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Well basically, as your reduce the wheel size 19" -->17" then your tire wall size increases 35 series on 19" and 45 series on 17". Overall diameter is stays roughly the same. Never exactly of course but pretty close (within 1% usually). Otherwise, the speedo etc. will get thrown off.