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Toyota Yaris Tire and Wheel Questions

18 messages,  Last post on Oct 23, 2009 at 12:02 PM

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What is this discussion about? Toyota Yaris, Tires, Wheels, Hatchback

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#12 of 18 Re: 15/14 inch wheels [lewjac3] by bamacar Oct 02, 2008 (4:52 pm)
Replying to: lewjac3 (Oct 02, 2008 3:58 pm) The only problem is the wheels never touch the road - you drive on the tires. The overall height of the tires is all that matters. Yes if the overall height is greater you will have lower rpms for the tires. A high profile 14" tire can easily have a greater overall height than a low profile 15" tire.   MPG is really dependent on distance divided by fuel use. If you have a greater tire height, it may appear when you divide the mileage by the fuel use that you are actually getting worse gas mileage. In reality the mileage is about the same, but your odometer will actually just be inaccurate (as it was based on a lower height tire). You will have actually traveled farther than the odometer will read.   It is actually tire width that has the greatest effect on mileage. A wider tire has greater friction and thus has lower fuel efficiency in general.
#13 of 18 tires size for hatchback by mvg Nov 13, 2008 (12:54 pm)
Hello,   Would tires size 190/70/14 fit on a 2008 yaris hatchback basic model.. stock everything? Replies to this message: highmiler650 (Nov 13, 2008 2:03 pm)
#14 of 18 Re: tires size for hatchback [mvg] by highmiler650 Nov 13, 2008 (2:03 pm)
Replying to: mvg (Nov 13, 2008 12:54 pm) These are the sizes available for a 2008 YARIS:   Plus Zero 175/70-14 185/65-14 195/65-14 Plus One 185/60-15 195/60-15 205/55-15 Plus Two 195/55-16 205/50-16 Plus Three 205/45-17 215/40-17 Plus Four 215/35-18 225/35-18
#15 of 18 Tire and wheel question by The_Gamaliel Dec 13, 2008 (10:45 am)
I just bought a new toyota yaris hatchback 2008 and i would like it to hook it up so i want to know what would be like the biggest wheel and proper tire for this type the car. Any advice help. Thank you.   P.S. I don't know anything about tires and wheels, i just know that the tire size is like 15". Replies to this message: highmiler650 (Dec 15, 2008 10:18 am)
#16 of 18 Re: Tire and wheel question [The_Gamaliel] by highmiler650 Dec 15, 2008 (10:18 am)
Replying to: The_Gamaliel (Dec 13, 2008 10:45 am) Just take a look at the previous message. The largest size 15 tire would be a 205/55-15
#17 of 18 Re: 15/14 inch wheels [lewjac3] by qschubmehl Apr 08, 2009 (1:55 pm)
Replying to: lewjac3 (Oct 02, 2008 3:58 pm) I think larger wheels will significantly increase your mileage by making the overall gearing higher. The tradeoff will be slightly slower acceleration. As 'Bama points out, the overall diameter is determined by the tire size ratio(ie A 175/70 will have a larger overall diameter than a 1175/60, because the distance from the wheel to the outside of the tire is 70% of 175mm, versus 60% for the 175/60).
#18 of 18 tire size vs mpg by girlcarbuilder Oct 23, 2009 (12:02 pm)
first tank was about 38 mpg. Getting better requires a lot of diligence and habit changes in driving as well as careful drivetrain selection.    We bought a '09 3 door white manual Yaris. I was not happy with Toyota for putting on the 15 inch rims/tires. Bigger tires cost more and more to turn! More rubber contact to the road means more friction.The 14 inch with smaller tires will give you a better mileage. It has taken a lot of care and time to relearn matching this cars clutch and gear match ups since the engine revs are a lot quicker than other standards in the fleet. We keep our speed no more than 60 mph and use the highest gear possible to cruise in. In other words, drive it like a diesel. RPMs under 2000. That got us to 40 mpg.    At 5000 miles, we caught a nail in the side wall of the rear tire. Rather than replace it with another 15 inch. We located two 14 inch rims and carefully selected another 14 inch tire with the same height as the 15 inch ones. 175/70 R 14. That one has the same width as the recommended 175/65 R 14 and the height of the 185/60 R 15, but more narrow. Best of both worlds. That bumped up another 2 mpg's. I am waiting for the next few tanks to come in to decide if that reading is in error or correct. So at this point it is looking like 42 mpg's. City. Oh, I do a bit of coasting in Neutral as well and use the cruise control.   I copied my post from another forum and brought it here. Rule of thumb, the fatter the tread gets and/or the shorter the tire, lower gas mileage. So best tire/rim size should be a 175/70 R 14. If you go up another size in the 14", the tread gets wider which will defeat your purpose. I wish 13" rims would fit in the front like the older Tercel and Mazda 323's.

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