PERFECT 15inch combo
ok may not be perfect but i think it is.
so a stock 14inch wheel with stock tires are 31lbs total, or at least that is what i have been told. i have found traklite cambers 15inch only weigh 10.4lbs and good year assurance fuel max LRR 195/60/15 17lbs. so a total of 27.4lbs that is 3.6lbs lighter per wheel. 195/60r15 is what tire rack says i need to go to for 15s. 3.6lbs x4=14.4lbs saving on all 4 corners. and some say 1lbs loss of rotating mass is about 3lbs loss of static mass. so 14.4x3=43.2lbs saving. now i know that there is the inertia formula to account for and aerodynamics. what you guys think |
Re: PERFECT 15inch combo
ok so i found a excel spread sheet calculator on rotating inertia i tried to put the the best info in it.
and this is what i got.... Wheel / Tire Weights and Rotational Inertia Car and Wheel Dimensions: wheel 1 wheel 2 Wheel size (inches) 14 15 Tire width (mm) 185 195 aspect ratio 70 60 wheel weight (lbs) 15 10 tire weight (lbs) 16 17 Total wheel weight 31 27 Car weight (with wheel style 1) 2740 Engine Torque 93 Engine HP 116 Car 0-60mph time 11.0 I1=Rotational Inertia 1, uniform density disk 0.706 0.626 I2=Rotational Inertia 2, Tire + wheel 0.680 0.641 wheel alone 0.179 0.140 tire alone 0.501 0.501 I3=Rotational Inertia 3, Tire + wheel, edge weighted 0.906 0.855 wheel alone 0.239 0.187 tire alone 0.668 0.668 Rotational Torque G=IW Per wheel Per wheel Uniform density disk 10.188 9.031 Tire + wheel 9.808 9.246 Tire + wheel, edge weighted 13.076 12.326 Torque devoted to linear acceleration1.052 0.916 |
Re: PERFECT 15inch combo
so if i am reading this right less tourqe is needed to move the 15inch combo then the stock 14 inch combo.
so the only debate is aerodynamics. |
Re: PERFECT 15inch combo
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Re: PERFECT 15inch combo
oh these wheels average about 120 a piece.
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Re: PERFECT 15inch combo
On my 2006 HCH I run G/Y Assurance F/M as well. Size 195 /65 / r15. 65 are slightly narrower tire than the 60's? H
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