How much will 18" rims effect 1/4 mile time?

[Nismo3112]

I wanted to know how much effect do 18 inch rims (~20 lbs) have on a 1/4 mile run...how many tenths of a second? Thanks!

[bigdo26]

if their lighter than the rims your currently running on, it wont make a huge difference, but an increase in the radius affects more than an increase in weight: moment of inertia = (Mass)*(Radius^2) so increasing the size affects acceleration more rapidly than an increase in mass. as far as times, might only turn out to be .1, .2 at the most

[azmaxipad]

I just ran a 15.6 @ 85.6 mph out at the track on my 18's. I think they picked up better than my stocks did. That's all stock. With nothin' removed from the interior.

[Nismo3112]

Originally Posted by azmaxipad

I just ran a 15.6 @ 85.6 mph out at the track on my 18's. I think they picked up better than my stocks did. That's all stock. With nothin' removed from the interior.

That's not bad at all...considering my friend with a 96 GLE and 18's ran a 16.7 lol

[I30tMikeD]

I pick up a .2 with 11.5lb 15's compared to 23lb 17's (just the fronts swaped out).

[MAXimumHP]

That's fairly significant. Do you see most of that early in the run?

[I30tMikeD]

Originally Posted by MAXimumHP

That's fairly significant. Do you see most of that early in the run?

yhea, mostly seems to help the 60' and to the 330 mark

[Nismo3112]

Originally Posted by I30tMikeD

I pick up a .2 with 11.5lb 15's compared to 23lb 17's (just the fronts swaped out).

Are those Mazda RX-7, or Millenia rims by any chance? Because those are light as fook

[I30tMikeD]

Originally Posted by ImStockBaby

Are those Mazda RX-7, or Millenia rims by any chance? Because those are light as fook

Millenia's

[Tally Max]

how much do they cost and where did you get them from?