- San Diego, CA
- 2014 Mazda3 S GT auto, 2008 MX5 6-speed
If you're not female, that purple had better be very dark.......
I recently saw a black Mazdaspeed3 with purple (not light purple) powder-coated 18" BBS wheels from an Evo X. It looked good to me, but I don't think I would like the combination with a yellow body so much. On the other hand, I have no idea why anyone would care what I think, and my wife is quite adamant that my taste in colours in deficient.I was what you guys would think of yellow '04 Mazda3 Hatch with stock rims purple plasti dipped rims.
Forgot to post my setup on this forum. Please pardon my amateur camera skills and lack of editing.
Wheels : 2013 Mazdaspeed3 OEM Wheels.
Specs : 18x7.5 +52.5
Tires: Continental ExtremeContact DWS
Size : 215/45-R18
Rubbing : Nope!
Unless the wheels are made of lead - or just maybe cast iron - the wheels won't make a perceptible difference to acceleration... as long as the overall tire diameter (and thus effective gearing) is unchanged.Has the bigger wheels slowed the car's acceleration much or made the ride much more firm?
Today I had my new wheels (w/ OEM tires) put on. The difference in weight is quite noticeable, both when carrying them and when driving them. I couldn't believe how heavy the OEM wheels with Michelin Xi3 winter tires felt carrying them to the shed after carrying the OZ Racing wheels with OEM tires from the shed. I can believe that the OEM wheels may very well weigh 27lbs. each.
Driving with the new wheels was fantastic. Part of the better steering response was undoubtedly going from winter to all-season tires, but there was no doubt the car felt better than it did when I bought it. Steering response and precision are excellent. The tires now spin so easily at launch that today I didn't even go past the kick-down switch (in sport mode) and the front tires were spinning wildly. I'm impressed with Mazda for allowing this much tire spin with traction control enabled. It results in quicker acceleration to allow some wheel spin in a car like this. This car is such a blast to drive, and to top it off, even with having some fun on the way home, from the gas station on the other side of town to home I averaged 27.5mpg in purely city driving.
I agree about the ride; also, steering feel improvement is a good point.Well, you can dismiss this "myth" all you want, but I can attest to seat-of-the-pants differences in acceleration and ride when reducing wheel weight by 8 lbs, each. It is real and noticeable.
As Chibana noted:
Although Chibana's profile says 2009 RX8, these wheels and tires are on his 2014 Mazda3 Sport GT....Part of the better steering response was undoubtedly going from winter to all-season tires, but there was no doubt the car felt better than it did when I bought it. Steering response and precision are excellent. The tires now spin so easily at launch that today I didn't even go past the kick-down switch (in sport mode) and the front tires were spinning wildly. I'm impressed with Mazda for allowing this much tire spin with traction control enabled. It results in quicker acceleration to allow some wheel spin in a car like this.
Yes, that's significant, if it is real (I haven't seen the reproducibility of the test results). All I'm saying is that if it is accurate, it is not all due to reduced wheel rotational inertia.I would argue 0.6s is pretty damn huge, myself.
To get those degrees, you had to run the numbers. The kinetic energy of the rotation of the wheels would be equivalent to much less than the kinetic energy of the forward motion, so the reduction in kinetic energy (to reach any given speed) would be much less than that of reducing the weight by 80 pounds total (given four wheels at 10 pounds reduction each)... or a couple percent of the vehicle mass. That means a couple percent reduction in acceleration time, if acceleration is power-limited - much less than 0.6 seconds. If you find the car launches better, that's a traction issue, and a potential explanation for a larger time improvement.I'm not sure where you're getting this "at launch" stuff, either. This is basic physics of rotational inertia. That inertia doesn't go away after launch. As long as you're accelerating, it will be a factor. I have B.S. and M.S. degrees in physics, so I know a thing or two about inertia....