CVT vs Tire Size

M

Mickman

New Member
#1
#1
I have heard mixed opinions on changing tire sizes with the CVT transmission. I have heard that it uses the wheel speed to sense for the CVT.

Is there any truth to this? and how sensitive is it to tire size changes?

I'd like to go from the OEM 17's to a 195/65/15 which would be a very small change in overall diameter.

Any advice?
 
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J

jolly

New Member
#2
#2
It's not a "CVT" thing, it's a "any transmission" thing and it's about extra strain caused by bigger/heavier wheels. More directly, a difference in diameter would also affect readings from ABS, TC and speedometer sensors. In your case, it's not even an issue since the Corolla is engineered to work with both your sizes (depending on models, it already comes with the 15-16-17"). You'll even gain a slightly better ride comfort and MPG with the 15" !
 
M

Mickman

New Member
#3
#3
Thats what I thought as well, but I had someone selling tires tell me that the CVT senses when to "shift" by wheel speed, and if you are too far off on overall diameter, issues will arise.

Thanks for the reply!
 
SuperchargedMR2

SuperchargedMR2

New Member
#4
#4
Mickman said:
I have heard mixed opinions on changing tire sizes with the CVT transmission. I have heard that it uses the wheel speed to sense for the CVT.

Is there any truth to this? and how sensitive is it to tire size changes?

I'd like to go from the OEM 17's to a 195/65/15 which would be a very small change in overall diameter.

Any advice?
Click to expand...
There will be no issues doing this. In fact the OEM 215/45R17 is actually a little small in diameter compared to the 15" and 16" sizes used on some Corolla models.

195/65R15 25.0" Diameter
205/55R16 24.9"
215/45R17 24.6"
225/45R17 25.0" Proper 17" size for Corolla, comes OEM on Corolla iM
205/50R17 25.0" Optional 17" size or winter tire size
 
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