Replacement Tire Sizes - Page 2 - Toyota Yaris Forums

SailDesign · 05-29-2009, 09:00 AM

Quote:

Originally Posted by Kal-El

215 is width, not height. The 55 measurement is sidewall height.

So my 55's are lower than stock. If I were to go 215/65/15, they would be the same sidewall height as stock.

And as for the speedo, my smaller diameter didn't affect the speedo at all (I have a nav that reads the same exact speed).

Ummmm - please read Kimona's link. The "55" is the sidewall height, true, but as a percentage of tire width. So the actual height of a 215/55 is 118.25mm. and the height of the sidewall on a 215/65 is 139.75mm. That makes the 65-series 43mm (twice the difference above) taller than the 55-series.

Small differences in height won't show up on an analogue speedo (can't read it accurately enough) but a 10% diffence sure will.

*kimona* · 05-29-2009, 11:38 AM

The only sizes I would recommend on stock 15" wheels with stock suspension are:

185/60/15 = 23.7
195/60/15 = 24.2
195/55/15 = 23.4
205/55/15 = 23.9

WolfWings · 05-30-2009, 01:18 AM

I run 195/60-15 here, no rubbing issues as long as your alignment is dead-on, even at full lock either direction.

Lets me get a *MASSIVE* variety of tires to choose from, though 195/50-15's are tempting for autocross use sometimes.

IllusionX · 05-31-2009, 10:49 AM

195/60R15 is alright, but when getting tires for the summer... aren't we supposed to look for a lower sidewall? :)

WolfWings · 05-31-2009, 12:10 PM

Depends. Sure, larger sidewall ratio = more flex, but stiffer tire in the first place = less flex so it can all balance out.

As I said, 195/50-15 is tempting for summer tires for just that reason, THAT is a sweet spot for summer-tires, 195/60-15 is a sweet-spot for top-end all-seasons.

808_Yaris · 05-31-2009, 04:21 PM

^ great info!

*kimona* · 06-02-2009, 09:01 AM

Quote:

Originally Posted by WolfWings

Depends. Sure, larger sidewall ratio = more flex, but stiffer tire in the first place = less flex so it can all balance out.

As I said, 195/50-15 is tempting for summer tires for just that reason, THAT is a sweet spot for summer-tires, 195/60-15 is a sweet-spot for top-end all-seasons.

195/50/15's are too short.

scape · 06-04-2009, 10:11 AM

195/50/15 is only .3" smaller diameter than the stock 14" setup of 175/65/14

EasyDriver · 06-09-2009, 11:01 PM

I was just looking at http://www.miata.net/garage/tirecalc.html today investigating what tire I would get to replace my 185/60/15s. Mileage is my primary concern since yet again gas prices have risen to $2.95 here in lower Michigan. Every tire I have had in the older 70 & 60 series has worn poorly. If I was picking a 15" tire for my Yaris today I would get a Goodyear Fuel Max 195/65/15....more tire height, less revolutions per mile=more mpg. Not a lot maybe...but 2% or close to it. It seems like the majority of Yarisworld prefers the cooler looking wider series tires. Perhaps our Hypermiler members could shed some light on this.http://yarisworld.com/forums/images/smilies/biggrin.gif

supmet · 06-10-2009, 12:02 AM

Quote:

Originally Posted by EasyDriver

I was just looking at http://www.miata.net/garage/tirecalc.html today investigating what tire I would get to replace my 185/60/15s. Mileage is my primary concern since yet again gas prices have risen to $2.95 here in lower Michigan. Every tire I have had in the older 70 & 60 series has worn poorly. If I was picking a 15" tire for my Yaris today I would get a Goodyear Fuel Max 195/65/15....more tire height, less revolutions per mile=more mpg. Not a lot maybe...but 2% or close to it. It seems like the majority of Yarisworld prefers the cooler looking wider series tires. Perhaps our Hypermiler members could shed some light on this.http://yarisworld.com/forums/images/smilies/biggrin.gif

Going from 185 to 195 will decrease your mileage more than going from 60 to 65 will increase it. You might still end up with an overall increase in mpg using fuel max tires though.

scape · 06-10-2009, 08:40 AM

if your looking for mpg, and mpg only; a skinnier tire is more important, not a wider one. less rubber, less friction. and a taller tire does exhibit less rotations--but in town driving may suffer from you trying to overcompensate and is generally not a huge factor unless highway is your mainly your thing.

the standard prius has (to my knowledge) 185/65/15. i'd shoot for that if fuel was your concern-- someone on a forum mentioned goodyear integrity's as a good tire for this application, i'll see if i can find a link

just remember, you'll be travelling faster than your speedo reads (@ 60mph = ~62mph)

05-30-2009, 01:18 AM	#21
WolfWings View User's Garage Drives: Silver 2007 3Dr - Gryph Join Date: Jul 2007 Location: Kansas City, MO, USA Posts: 310	I run 195/60-15 here, no rubbing issues as long as your alignment is dead-on, even at full lock either direction. Lets me get a MASSIVE variety of tires to choose from, though 195/50-15's are tempting for autocross use sometimes. __________________

05-31-2009, 12:10 PM	#23
WolfWings View User's Garage Drives: Silver 2007 3Dr - Gryph Join Date: Jul 2007 Location: Kansas City, MO, USA Posts: 310	Depends. Sure, larger sidewall ratio = more flex, but stiffer tire in the first place = less flex so it can all balance out. As I said, 195/50-15 is tempting for summer tires for just that reason, THAT is a sweet spot for summer-tires, 195/60-15 is a sweet-spot for top-end all-seasons. __________________

06-09-2009, 11:01 PM	#27
EasyDriver Drives: 2008 Yaris Meteorite LB Join Date: Feb 2009 Location: Southern Michigan Posts: 61	Tire Size... I was just looking at http://www.miata.net/garage/tirecalc.html today investigating what tire I would get to replace my 185/60/15s. Mileage is my primary concern since yet again gas prices have risen to $2.95 here in lower Michigan. Every tire I have had in the older 70 & 60 series has worn poorly. If I was picking a 15" tire for my Yaris today I would get a Goodyear Fuel Max 195/65/15....more tire height, less revolutions per mile=more mpg. Not a lot maybe...but 2% or close to it. It seems like the majority of Yarisworld prefers the cooler looking wider series tires. Perhaps our Hypermiler members could shed some light on this.http://yarisworld.com/forums/images/smilies/biggrin.gif

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05-29-2009, 11:38 AM	#20
kimona Super Moderator Drives: 2014 White VITZ Join Date: May 2007 Location: Huntington Bch, CA Posts: 4,938	The only sizes I would recommend on stock 15" wheels with stock suspension are: 185/60/15 = 23.7 195/60/15 = 24.2 195/55/15 = 23.4 205/55/15 = 23.9

05-31-2009, 10:49 AM	#22
IllusionX It's the illusion you see View User's Garage Drives: 07 Yaris Sedan Aero Join Date: Oct 2006 Location: Brossard, QC Posts: 3,888	195/60R15 is alright, but when getting tires for the summer... aren't we supposed to look for a lower sidewall? :)

05-31-2009, 04:21 PM	#24
808_Yaris Where is Oahu? View User's Garage Drives: 5-door meteorite metallic Join Date: Dec 2008 Location: HI Posts: 1,346	^ great info!

06-04-2009, 10:11 AM	#26
scape View User's Garage Drives: 2007 Yaris Hatchback Join Date: Jul 2007 Location: Beaufort, South Carolina Posts: 388	195/50/15 is only .3" smaller diameter than the stock 14" setup of 175/65/14

06-10-2009, 08:40 AM	#29
scape View User's Garage Drives: 2007 Yaris Hatchback Join Date: Jul 2007 Location: Beaufort, South Carolina Posts: 388	if your looking for mpg, and mpg only; a skinnier tire is more important, not a wider one. less rubber, less friction. and a taller tire does exhibit less rotations--but in town driving may suffer from you trying to overcompensate and is generally not a huge factor unless highway is your mainly your thing. the standard prius has (to my knowledge) 185/65/15. i'd shoot for that if fuel was your concern-- someone on a forum mentioned goodyear integrity's as a good tire for this application, i'll see if i can find a link just remember, you'll be travelling faster than your speedo reads (@ 60mph = ~62mph)