195/65R15's on a 2008?

Fit yes
Rub No they won't

 

I have that size on my 2008, fits fine and speedometer is more accurate with that size

 

Going to 185/65R15 to 195/65R15, the outside diameter of the tire will increase. With the 185 (theoretical) revs per mile is 849, and with 195 it's 832. That may "fix" your speedo, but it'll under report your miles travelled on the odo, by about 2 percent. Kind of changes the car's "gearing" as well?

 

so if you drive 100k miles on them, your car will only register 98k miles.......bonus

 

Revs per mile are partially independent of tire size

Going from cheap 195/65 integrities to 185/65 ecopias revs per mile only changed a little under 1%

 

Plus the car's about 6~7 mm higher?

Yeah, I know...

 

Not true; the difference is -2% which increases the revs/mile by 17. Closer fit is 195/60R15. The overall difference will be +1.2%.

 

The car was designed to have the 195 tires, well the speedometer was calibrated with the 195's, they won't rub, they aren't wider and you will get better mileage, of course run the front at 40 and the rear at 38 pounds of air and cycle the emergency brake so it doesn't drag.

 

Revs per mile are affected by tire squish and other factors

YOU CAN FIND 185 and 195 tires that have MANUFACTURER listed REVS PER MILE THAT ARE THE SAME

Check tire rack and see what I mean

 

This should work no problem, only causing some small changes in speedometer and odometer as others have pointed out. The only thing to watch out for is use of snow chains. Going up a size in tire "uses up" the extra space that was left in the wheel well for use of snow chains.

 

Not if you adjust the sidewall ratio (as you should) to maintain, as close as possible, the overall diameter/circumference of the tire.

 

The car was engineered for a very specific tire with a known TRPM, which results in a known number of ECM pulses-per-mile.

Changing ANYTHING from Tire Brand, to Size, Load Rating (# plys), Std v LRR and even OEM to retail models can affect the tire revs per mile.

Unless you LOOK UP the TRPM, you do not know by any other method, what the exact difference from one tire to another is.

 

tire rack gives the trpm with the tire specs. if your gonna stick with 15" wheels, 205/60r15 works good, and makes the speedo more accurate.

 

I've got 205/65/15 on my 06 and 07. No rubs better handling. I might try 215 next time if I have the clearance.

Posted via the PriusChat mobile app.

 

You might find this to be useful:
Tire Size Comparison

 

Hi There,
Just a week ago I was able to acquire a 2007 Prius. I know nothing much about this car for I was trying to scout a used car daily driver typically a corolla but I ended up getting this one for its the only one that was available. I basically want to leave the car in stock specification because I'm after for the gas mileage and longevity. Getting back to the originality of the car was all there except for the rims looks like its not the original one with a 185 65 15 tire. I test drove the car and I was trying to get an accurate reading of the speedometer vs my GPS and with the original tire that came with it (not the original wheels), I was already off averagely 43mph on the odometer and 41.5 to 42 mph on the navigator. Reading the book I guess the original tire size of this car was 185 65 15. The one the caught my eye was the aftermarket wheels which is 7 inch wide and I'm not sure if I'm correct but the original wheel was only 6 inch wide. In my case it maybe that since the 7 inch wheel width is out of specs having the 185 65 15 tire on it, I ended up buying a 195 65 15 Bridgestone which Costco is blowing out right now. Since I'm not to familiar with the cars true performance, I notice when I tried getting the speedo reading, from 20 mph to 65 mph it was right on the money. I don't really know the "true gas mileage consumption" will be but before, I was getting averagely 42-44 mpg reading. Now I'm reading 46.5-50 mpg on normal grandpa driving. But then again, time will tell and I haven't had that much experience and time on driving this car yet. Just like what the other gentleman said in the forum, the 205 60 15 is very close to the original 185 65 15 in diameter. I love those tire. They have the street sport stability and ride even on close to daily use. I was using those on a Saab 900 Turbo and it rides like a dream because the car has horsepower in it.
My question is: I hope I don't wreck the car, transmission or burn out the cell battery by using this tire for I maybe giving the car a bit more torque with its size. Any feedback would be appreciated.
I'm probably not gonna get rid of the stock tires until I find the correct rims for this. But I see 2 different original rims style on the size 15. I don't even know what prius is this? It has the leather seats, navigation, door opener and rear view mirror dimmer.
By the way, I saw in the manual after changing the tire you have to set the tire inflation warning. I did that and it blink 3 times and now im driving the car with that light one. All of these stuffs are new to me.
Classic Car Guy...

 

Don't conflate speedometer "error" with tires being too small. The odometer should be accurate with the stock tire size, and the car's "gearing" too. The speedometer is off by design; it's mandated that a speedo should not read low, but slight over-reporting is acceptable.

The mpg the car reports is also high, basically Toyota bs'ing a bit. Well actually about as much as they can get away with.

 

Thanks for that tip. Now I'm a bit closer now to what I want to accomplish. I am trying to get a set of the original wheels locally so I can have it install in the 185 tires. and put it back in the car. It kind of looks not right at first when I saw the original tires on a 7 inch wide wheels so I thought I should start looking the right ones while the season is in good timing for shopping.
Its a good thing when I bought the new tires yesterday, It was the same size that I use on my other car so I can still use that. The only thing is Costco might not give me the free tire rotation anymore.
...... Anyways thank you again for the info. Was gonna ask if anyone have any situation with not having a temperature and oil pressure gauge in your car or if like anyone attempted to install these equipment's? Or maybe I'm just an innocent Classic Car Guy.

 

run the bigger tires. it won't hurt anything, and if you use LRR tires, you will still get good mileage. a lot of us like to set tires at 40psi to get a little better mileage too. I have 215/50r16 tires and got 51+ MPG all summer. now that its cold I expect about 45MPG.

no need for any gauges. this ain't a GTO.