Want to upsize not sure to what tho?

Wheel and tire information and upgrade discussions
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Joined: Sun Oct 28, 2018 3:10 pm

Want to upsize not sure to what tho?

Postby arscottsmith » Mon Oct 29, 2018 9:06 pm

Hey guys new to the forum. I've looked and looked but can't find the exact info I'm needing.

Just bought an 09 base with the 2.4 motor. Steel wheels with 205 55/16's and it needs new tires. Speedometer reads 2-3 mph over and odometer is 2miles under per 100. This car will be my work/tow car. I transport trucks/motorhomes for 3 different companies and tow the car behind me. It will be loaded heavy with stuff for work, cooler, mattress etc. Having the speedo/odo accurate is not a big deal as I'm always watching the speed on my gps. I'm looking to improve fuel mileage and have a better ride with the new tire choice. How big can I go without having any issues?

Was rear-ended by a semi in my 04 Vibe 2 weeks ago. It got great fuel mileage and I know it will go down with the 2.4 but couldn't pass up a 27k mile car for $5k.


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Joined: Sun Nov 02, 2008 7:26 am
Location: Cheyenne, WY

Re: Want to upsize not sure to what tho?

Postby Mark » Tue Oct 30, 2018 3:02 pm

Hello Scott, and welcome to the best site on the innerwebs.

I went to a 205/60/16 on a couple of mine and it made a pretty good difference in ride, and the speedometer is closer too.

Here's a link to a really handy tire size calculator that lets you compare various sizes. I wanted to stay at under 5% difference in diameter.
'04 Base Frosty, '08 Base Stealth, '05 Base Satellite

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Joined: Sun May 06, 2018 4:28 am

Re: Want to upsize not sure to what tho?

Postby hogdoctor » Fri Nov 02, 2018 3:49 am

stock tire diameter is 24.9 inches. Largest I've seen anyone run is 28 inches. I expect a 15 inch wheel would give a more compliant ride due to more sidewall to absorb the chuck holes, same for a larger diameter tire. I'm about to pull the trigger on 205/65-16's for winter tires, 1-1/2 inch taller, gives me 10% larger tire and 10% reduction in indicated speed (easy math). I know there's speed sensor modulators out there, not sure I'd bother with it. The lower RPM at speed should help your fuel economy at bit too.

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