Wheel and Tyre calculator
Posted: Tue Apr 17, 2012 10:25 am
by aka_juffa
Very handy calculator. It allows you to see the affect of changing wheel/tyre size on your actual speed v speedo reading, and provides information on how much closer/further the outside edge of the tyre will be from the inside of the wheel guard/fender when compared to your current wheel/tyre combination....very handy when upsizing your wheels/tyres
http://www.rimsntires.com/specs.jspJ.
Re: Wheel and Tyre calculator
Posted: Tue Apr 17, 2012 10:56 am
by hks_kansei
Tyre section width = T
Tyre aspect/profile = A
Wheel Diameter = D
Wheel Width = W
Wheel Offset = O
Rolling diameter = (D*25.4)+((T*(A/100))*2)
Wheel inner barrel = ((W*25.4)/2)+O
Wheel Outer Barrel = ((W*25.4)/2)-O
If new wheel Inner barrel > OEM wheel, new wheel closer to guard liner/suspension
If new wheel Outer barrel > OEM wheel, new wheel closer to outer guard.
Track change = oldO - newO
Formulas for those who may want to just plug it into excel to compare bulk wheels/tyres/etc.
note: I haven't had a chance to double check my formulas yet, but they should be fine.
Re: Wheel and Tyre calculator
Posted: Sat Apr 21, 2012 4:47 pm
by Jace
mr mathamagician up here ^
i like this one because it gives a rough idea of tire stretch/bulge and i think it's a bit clearer as well
http://www.willtheyfit.com/