Yeah smaller = more they stick out. Ie. +40 will stick out more than +53.

Ah well there ya go.

My bad.

I would think there would be an acceleration increase, coz i would have thought larger diameter means you move further for the same amount of force applied, and looking at tyre weights for those sizes in the same brand, well, they usually weight the same amount. Thats also assuming you have the same pressure in the tyres. That takes me back 6 years to highschool physics... can't remember the formula though. Has an 'r' in it for radius... i'm pretty sure.

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Speed doesn't kill. Suddenly becoming stationary does!

T = r x F
where T=torque in Nm
r = radius in m
F = Tangential Force in N

generally speaking, engine generates the same amount of torque, with an increase of radius, you're losing tangential force, hence, less wheel spin action, heheh~

Y' see... i don't get that... I was thinking if you spin a small wheel and a bigger wheel from the centre at the same speed, outside of the bigger wheel moves a further distance. Hence you will move further distance for the same amount of force applied at the centre, as long as both wheels weigh the same amount. Unless your talking about burning rubber?

Totally off topic now...

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Speed doesn't kill. Suddenly becoming stationary does!

for a bigger wheel, you get a larger circumference, so if the bigger wheel and small wheel are rotating at the same speed, yes, the bigger wheel will travel a greater linear distance.

but when your'e toking about acceleration, you need more torque to accelerate a bigger wheel even if it weights the same. because the moment of inertia changes has increased due to different weight distribution.

Torque = Inertia x angular acceleration.
so if inertia increase (due to the radius increase of the bigger wheel) then you need to supply more torque in order to accelerate the wheel with the same angular acceleration as the smaller wheel.

yes, totally off topic.

Ok, now you just took it beyond my comprehension. I think thats why i stuck to the chemical side of the sciences.

Anyways back on topic... please continue to talk about offset, stud patterns and such n such.

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Speed doesn't kill. Suddenly becoming stationary does!

So... in theory, the acceleration of a car with 16" rims would accelerate faster with a car with 17" or 18" rims?

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Soon to be driving a S204...

if the car is under power, smaller rim will definately accelerate better,
if the car has shit loads of power, hence, shit loads of torque, then having smaller rim will just wheel spin every gear (ff or fr cars), so bigger rims will reduce those wheel spin and actually accelerate the car.

so it all depends..

normally awd car like wrx doesn't wheel spin, not a stock one anyway

Damn theories... i like practicality. Ok Kenny, you let me drive your car now with the 16's, then when you get ya 18's you let me drive it again... i'll test it out

And no. I'm not letting you drive my car first!

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Speed doesn't kill. Suddenly becoming stationary does!