MPG vs wheels - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

bionick · 01-24-2014, 01:24 PM

Me personally, I don't think this would change it that much but a second opinion doesn't hurt.

I recently upgraded from the stock LT trim 18" wheels and tires to a set of 20" with 275/40/20 wheels with a .1" larger wheel diameter. Each wheel maybe weighs 5 pounds heavier than my stock ones which I don't think would effect anything. Ever since I got these put on my mpg on the highway seems to have dropped quite a bit. Before I'd have an average of anywhere from 28-34mpg and now it Is around 18-24. Trying to figure out what could cause this since the only thing I've done lately is wheels

GVA 45TH 2SS · 01-24-2014, 04:56 PM

I don't think its the height as much as the width.
I went to 275 40 up front and 315 35 on the back same Diameter and my mileage has dropped on my SS.
there is just more contact with the road thus more friction, more weight yada yada yada..

bionick · 01-24-2014, 11:21 PM

Quote:

Originally Posted by GVA 45TH 2SS

I don't think its the height as much as the width.
I went to 275 40 up front and 315 35 on the back same Diameter and my mileage has dropped on my SS.
there is just more contact with the road thus more friction, more weight yada yada yada..

Yeah I'm running 20x10 all corners and the stock were like 18x8 I believe so there's a lot more tire on the ground

01-24-2014, 01:24 PM	#1
bionick Drives: 2010 2SS/RS M6 Join Date: Oct 2013 Location: Gilbert, AZ Posts: 931 View My Garage	MPG vs wheels Me personally, I don't think this would change it that much but a second opinion doesn't hurt. I recently upgraded from the stock LT trim 18" wheels and tires to a set of 20" with 275/40/20 wheels with a .1" larger wheel diameter. Each wheel maybe weighs 5 pounds heavier than my stock ones which I don't think would effect anything. Ever since I got these put on my mpg on the highway seems to have dropped quite a bit. Before I'd have an average of anywhere from 28-34mpg and now it Is around 18-24. Trying to figure out what could cause this since the only thing I've done lately is wheels __________________ 2010 Camaro 2SS/RS \| 416 LS3 \| FED stage 2 heads

01-24-2014, 04:56 PM	#2
GVA 45TH 2SS KNGTFALL Drives: 2012 2SS 45th edition Join Date: Aug 2012 Location: (Near) Charlotte, NC Posts: 1,533	I don't think its the height as much as the width. I went to 275 40 up front and 315 35 on the back same Diameter and my mileage has dropped on my SS. there is just more contact with the road thus more friction, more weight yada yada yada..