Rims from 18 to 20

[Pedja]

Hi guys! If I change rims and tires from 275/65/18 to 275/55/20 will it effect MPG and do I need to recalibrate ECU ? Anyone did the same ?

 

[George Bednar]

I has a 2019 limited that I changed the 20" limited rims to the 22" limited rims and did not calibrate anything. The was a tire manufactures website that I entered the data into and it said about 1.5 or 2 miles per hour difference at 55mph. May have been tirerack.com

 

[CHeYeNNe71]

MPG will depend the difference in weight of both setups

 

[Big Jim Swade]

Both sizes are almost exactly the same diameter. You won't have to change anything. My stock wheels are 275/55-20's but my winters are 275/65-18's.