14 inch rims

[old yellow]

will 14 inch rims work on an unmodified festiva? how is your gas milage with 14's is the mpg go down under 40 mpg?

[Team Lightning]

I'm running Miata solid spokes with 185-60-14 tires and on 250 mile trips I get 37-38 mpg running 70-75 mph.

[Zanzer]

I have 2 sets of 14's that I run on my car. One set requires spacers and and one doesn't due to different offsets. The only problem I've had so far is a little contact with the tire and fenderwell on the rear when loaded, but a little massaging of the lip would fix that. I can't accurately comment on fuel mileage because I need to check it with the GPS since the speedometer is off by 4MPH with the 14's, but MPG doesn't seem to be much worse if any.

[scitzz]

I can't accurately comment on fuel mileage because I need to check it with the GPS since the speedometer is off by 4MPH with the 14's, but MPG doesn't seem to be much worse if any.

I think there is a sticky with a calculator to determine the percentage of change a tire makes. If you take your mileage, and the percentage is, say, 7 percent, you can just multiply by 1.07, and get pretty close, right?

[Zanzer]

Sounds good to me . Honestly, I was going to try to track it using that calculator....but I'm lazy LOL. I thought just using the GPS would be easier (and allow me to compare to the calculator accuracy), but I always forget to turn it on at some point during the run :highly_amused:

I may try the calculator after the next tank. I'm not super worried about it since it doesn't seem to be much worse than the 13's and I like the ride and handling of the 14's much better so I'm happy with the small trade-off.

[Team Lightning]

The above mpg's I quoted are non corrected. If I remember correctly, on my car there is a 10% difference between the 145-12's and my 185-60-14's.

[Aaronbrook37]

What are you looking to accomplish with larger wheels and tires? Keeping in mind that I'm Aspire-swapped, I initially had 185/60-14's and steelies... then downsized to 185/60-13's on Honda VX aluminum wheels instead. Much happier with the 13's because I've got performance tread, the same width, and a significantly lighter wheel now too.

[scitzz]

http://www.miata.net/garage/tirecalcold.html

yeah, my 175 70 13's are 7.4% off, I usually just go with 1.07.

[old yellow]

well i got a set of rims i wanna use with 185/60/14 tires i know right now with my 12 inch tires the car's speedo is 1 mph faster then gps speed

[Zcallicutt7]

IMG_20130608_202953.jpg

I'm running 165/60 R14 on my Festiva and my tires are the same overall height as stock tires but 1" wider so my MPG's didn't change. And it rides/drives much better!

[scitzz]

well i got a set of rims i wanna use with 185/60/14 tires i know right now with my 12 inch tires the car's speedo is 1 mph faster then gps speed

7.8% too slow, when you are reading 60 on your speedo, you are doing 64.7. Multiply mileage by 1.07 and you should get close readings.

[old yellow]

7.8% too slow, when you are reading 60 on your speedo, you are doing 64.7. Multiply mileage by 1.07 and you should get close readings.

right now with the 175/60/12 tires if i'm going 60.0 mph on my speedo i'm really going 59.0 mph gps speed

[Safety Guy]

Old yellow said, "right now with the 175/60/12 tires."

You probably mean "165/70-12 tires." Someone may have made 175/60-12s, but they'd be hard to get and really rare here in the U.S.

Karl

[bhazard]

Stick with a light weight wheel and a smaller overall diameter tire, like a 14x5 or 5.5, and something like the above mentioned 165/60 or 175/65 at the largest. The bigger sizes like 185/60 will cause a noticeable drop in performance and probably rub the rear strut.

[old yellow]

I meant 155/12 I was thinking of my white aspire because it has 175/60/13 tires