bigger rims/tires = faster ride?

[ssaloon]

the primary reason for upsizing wheel/tire combos is:

1. added traction
2. to accomodate bigger brakes
3. porma hehehe

[mazdamazda]

bigger tires will result in a slighty higher topspeed...

but it will certainly DECREASE your straight-line acceleration.

though this is negligible if you have a high hp / torque engine.

[baludoy]

^will this affect the efficiency and mileage of your car?

tsaka do larger/wider rims weigh more than the stock ones significantly

[Jim05]

Basahin niyo itong article na ito. Baka makatulong ito: http://grassrootsmotorsports.com/new...er.php#more-74

[niky]

It all depends.

If the overall diameter of the wheel/tire combo is bigger, your speedometer will read slower than stock at all speeds.

You can use the Miata.net Tire Calculator to determine this.

If you maintain your original rims and go for larger tires:

Weight increases
Comfort increases (unless the new tires are too big, and bounce or rub on the body, in which case, Comfort decreases)
Acceleration decreases
Fuel economy decreases
Handling suffers (if you get balloon tires)
Handling becomes better (if you get wider tires)

If you get bigger rims, but match overall diameter exactly by using thin tires

Weight increases
Comfort decreases (due to stiff sidewalls and increased unsprung weight)
Acceleration decreases
Fuel economy decreases
Handling becomes better

If you get bigger rims that weigh the same as stock and match overall diameter by using thin tires

Weight decreases (thinner tires weigh less)
Comfort decreases slightly
(or not at all, if the stock tires are already low profile and the stock mags were heavier than the aftermarket mags)
Acceleration increases/decreases (depending on the tires)
Fuel economy increases/decreases (depending on the tires)
Handling becomes much better

I've read that article posted by Jim05 before, it's good stuff: http://grassrootsmotorsports.com/new...er.php#more-74