I've just bought a preowned 06' Xa that came with a set of 18" XXR 008 rims on 215/35 tires.

It looks like I'm only getting 25 mpg.

Could this be due to the large wheels? Would downsizing to 16" rims and 205/55 tires increase the MPG?

Thanks in advance....

 

i think its more about weight. how much do those XXR's weigh anyway?

 

not sure as the weight isn't listed on their web site. was going to ring them and find out.

whats an acceptable weight? less than 20lbs?

 

Any 18" wheels are gonna kill mpgs. With some nice lightweight 15s or 16s you should expect more like mid 30s for mpg. With an xA it should be closer to 40 tho.
When I put my 18" TRDs on my mpgs drop atleast 3-4 on the box regularly.

 

my wife's xb is on 18's and still manages 31-33 mpg city/highway. even with her lead foot lol

 

I'm getting 3 mpg more with my 15"s over the 18"s.