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Old 03-03-2010, 10:09 AM   #19
thebarber
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Quote:
Originally Posted by sbergman27 View Post
The taller sidewall offsets the smaller wheel size by 20%. But my point is really that, overall, there is not much difference between the two configurations. The 15 is 3.4% higher diameter. The 14 is 4.9% narrower.
1010tires.com suggests no more than 3% difference when buying new tires

that said, i ran 205-55-15 all last summer vs my 175-65-14 stock stuff and i personally think the speedometer was more accurate.

@ 120kph, 3.4% can be the difference between getting pulled over or not getting pulled over...
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Old 03-03-2010, 12:27 PM   #20
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I'd rather have the 14s' than the 15s' . The smaller / thinner tires do better in rain and snow . Plus give little better mileage . The '92 Ford FESTIVA with four 12" studded snow tires would go through or up snow coverd roads / streets with ease .
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Old 03-04-2010, 05:50 PM   #21
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big tires keep RPM's low at highway speeds... I run 15's... would be tempted to go with 16's if I ever bought wheels. Most of my miles are put on at speeds above 40mph.

About 1/3 of my miles are done on 1000 miles trips at 70mph every third month. even my drive to work is half 40+ mph, and half 20-35mph.
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Old 03-20-2010, 11:14 AM   #22
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Originally Posted by Cosworth View Post
electric PS in Yaris totally blows. I believe it is one of the culprits in why Yaris handles so weird at highway speed.

as for the original comment/question, I really don't think you're gonna see much gas saving based on 14 vs. 15 tire comparison.

I think there's more gas to be saved by just getting an ecometer and drive steadily.
I have never had weird handling at any speed. I run 42psi front and 35 psi rear. The thing is rock steady and hands free on the highway at 2500 rpm in 5th gear. Sedan w/ 15" wheels. The 14" are slightly narrower, smaller diameter and weigh less. Things that improve acceleration, ride quality all with less rolling resistance. I am working on putting 185/70-14s on some light weight alloys I own. Can't wait to get that in place. Just have to defeat the tpms first.
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Old 04-11-2010, 03:02 PM   #23
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Stock Tire - 175/65R14 >Search Tires Tire 1 - 185/60R15
Section Width: 6.88 in 175 mm Section Width: 7.28 in 185 mm
Rim Diameter: 14 in 355.6 mm Rim Diameter: 15 in 381 mm
Rim Width Range: 4.5 - 6 in Rim Width Range: 5 - 6.5 in
Overall Diameter: 22.95 in 582.93 mm

Overall Diameter: 23.74 in 602.99 mm
Sidewall Height: 4.47 in 113.53 mm

Sidewall Height: 4.37 in 110.99 mm
Radius: 11.47 in 291.33 mm

Radius: 11.87 in 301.49 mm
Circumference: 72.09 in 1831.0 mm

Circumference: 74.58 in 1894.3 mm
Revs per Mile: 906.3

Revs per Mile: 876.1
Actual Speed: 60 mph 100 km/h

Speedometer1: 58.0 mph 96.6 km/h
Speedometer Difference: - Speedometer Difference: 3.447% too slow
Diameter Difference: - Diameter Difference: 3.33%
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Old 04-11-2010, 04:27 PM   #24
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Originally Posted by bronsin View Post
EPS is a delusion just like the Prius is a delusion. If its so good how come the Yaris is rated 29 mpg and the ECHO is rated 34 mpg?
Taller gears for the Echo.
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Old 03-20-2017, 05:16 AM   #25
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Usually the diameter of the tire is the same on the 14 and 15" Yaris wheels. The difference is that the tire on the smaller rim has a taller sidewall that absorbs more road shock and softens the ride a bit. It also reduces the cars cornering ability somewhat.
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Old 03-20-2017, 07:54 AM   #26
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Quote:
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Usually the diameter of the tire is the same on the 14 and 15" Yaris wheels. The difference is that the tire on the smaller rim has a taller sidewall that absorbs more road shock and softens the ride a bit. It also reduces the cars cornering ability somewhat.
I think we have a winner for the oldest thread resurrection. Over 7 years!!
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Old 03-20-2017, 12:28 PM   #27
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I think we have a winner for the oldest thread resurrection. Over 7 years!!
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Old 03-20-2017, 02:22 PM   #28
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I think we have a winner for the oldest thread resurrection. Over 7 years!!




How about another star for the OP?
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