Anyone have pics of their prius with Yokohama Geolanders on it? 215/70r15

MPG will take a big hit...

 

215/70R15 G015 on stock rims. I drove it for awhile with no lift. The front tires would rub the wheel liners going over bumps. I went from 38mpg to 30mpg. I run 35 psi in the front and 40 in the back. I've got the prius offroad 1.5" lift and some airbags on the rear suspension and a curt receiver.


Stock

tires

tire and lift

both again

 

It seems 2010 models get bad mpg. The previous tires were cheap Douglas all seasons and I've never had LRR tires on it. I live in Texas and am pretty much maxing out the A/C constantly. I might have a A/C problem that is killing the mpg. Also my drives have been about 7miles to and then from work. It's a lot of stop sign/lights on these 45-55mph roads.

I've gotten 17 to 19mpg towing my boat. I think that's pretty good since pretty much no truck makes that empty with real world fuel economy. I think my HVB is starting to get really bad and have been getting closer to 25mpg lately. I was finally able to order Project lithium about a week and a half ago. I suspect the current tires will last the rest of the car as long as they don't dry rot. Might not ever get to try LRR tires. I don't know for sure.

 

I don't know if you can consider my tires LRR, but I just put on the Continental True Contact Touring tires. I noticed a significant drop in mpg (about 10mpg) for the first 500 miles. Then it's like the tires got "broken in" and now I get back to normal fuel economy. I average somewhere between 30-40 mpg because I have a 3-5 mile drive to work, and it's 55 most of the way until you get into town. And with the AC on full blast it does kill mpg. I would get 20-25 mpg if I run the AC on full blast. But with the new tires, going on a 30-45 min drive with a mix of highway and city driving I get between 50-60 mpg. Rain also kills MPG, but my tires cut through the heavy Florida downpours like it's nothing. These Continentals are better than the Michelins that were on my mother's Camry. My Prius is a 2012 with the stock 15in rims (not lifted or anything) with 226,500 miles.

 

My 2010 gets great mpg. Depending on the tires.
When I replaced the tires, I dropped from 48 to about 42.
Since I recently replaced my head gasket and seated in the valves, one was slighly leaking,
It's running very smoothly and it's back up to 46mpg. Unless, I drive more Priusly, then it's
up to 48 or more.
How you drive it makes a big difference.

 

Hi Brock,
What 1.5” lift did you use?

Have you taken any long 2+ hour flat highway drives not towing? How did fuel economy look if you have?

 

Im not sure if mpg will actually take a big hit. Your readings will be deceiving because a bigger diameter tire will get you further per each spin, but the computer does not know that unless you calibrate it to that. So lets say circumference is 10% longer, then your mpg will "drop" by 10% but you went 10% further, so in reality you went the same distance on the same amount of gas as you would with smaller tires.

I think the lift does more mpg loss than tire size, but dont quote me as this is just hypothetical. Reason i think this is because the friction loss of a steaper angle of attack for the axle when spinning. If you ever tried to impact or hand ratchet with a swivle at a large angle, you know. The aerodynamics are neglectable imo, as there wasnt any additional surface area added to act as a parachute.

Now tire size, unless you go super wide, shouldnt require any additional power for the transmission to get it in motion. Its an electric motor, if the computer detects the rpms to be too low, it just adds more electricity or switches to a torque multiplier gear until its up to speed. But you also go further per each rotation, so in the end it evens out. The only energy loss that would make sense should be the heat in friction loss from having to use a torque multiplier gear more often.

Also i bought some SUV rims for mine, but the tires with the rims are too big to fit in the wheel well lmao. I will have to cut the walls later and put some flares or something to cover it up. Dont think i wanna add a lift, as much as i do, because the mpg will suffer

 

LOL