wider tires decrease mileage?

brucelidat · 12-08-2012, 03:39 AM

Just wondering how much running 285 square would decrease my gas mileage from stock. Sort of thinking if running square do I can totate my tires and them wear evenly as opposed to changing 2 tires at a time more frequently. It would also allow me to save on alignments since I would be changing tires less frequently.

DEpointfive0 · 12-08-2012, 04:59 AM

Quote:

Originally Posted by brucelidat

Just wondering how much running 285 square would decrease my gas mileage from stock. Sort of thinking if running square do I can totate my tires and them wear evenly as opposed to changing 2 tires at a time more frequently. It would also allow me to save on alignments since I would be changing tires less frequently.

You'll be losing gas mileage because of extra rotational force needed to spin the wheels... That's kinda only on the rear though, the front will just be added weight

KERMIT · 12-08-2012, 10:40 AM

Two reasons

Higher rolling resistance - affects hwy mileage most
Higher inertia - affects city mileage most (or any transient condition)

SouthArk370Z · 12-08-2012, 11:17 AM

Tire weight, width, and compound will all affect MPG to some extent. From what little I've seen on the subject, it's not that much difference. If you were driving an econobox and going for max MPG, it would matter. If you're driving a sports car and handling has a higher priority, not so much.

homeryansta · 12-08-2012, 11:20 AM

Take 2 cylinders with different heights and roll it down a ramp

brucelidat · 12-08-2012, 11:25 AM

So any estimates on how much loss I might be looking at going frim stick to re-11s square 285. Wondering if it's worth it or not for the pros mentioned above.

SouthArk370Z · 12-08-2012, 11:29 AM

Quote:

Originally Posted by brucelidat

So any estimates on how much loss I might be looking at going frim stick to re-11s square 285. Wondering if it's worth it or not for the pros mentioned above.

Try http://www.google.com/#hl=en&q=tire+width+vs+MPG

12-08-2012, 03:39 AM	#1 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 31	wider tires decrease mileage? Just wondering how much running 285 square would decrease my gas mileage from stock. Sort of thinking if running square do I can totate my tires and them wear evenly as opposed to changing 2 tires at a time more frequently. It would also allow me to save on alignments since I would be changing tires less frequently. __________________ Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

12-08-2012, 11:17 AM	#4 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Tire weight, width, and compound will all affect MPG to some extent. From what little I've seen on the subject, it's not that much difference. If you were driving an econobox and going for max MPG, it would matter. If you're driving a sports car and handling has a higher priority, not so much. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

12-08-2012, 11:20 AM	#5 (permalink)
homeryansta Enthusiast Member Join Date: Apr 2011 Location: Brooklyn Park, MN Posts: 424 Drives: 04 se-r spec v, 370z Rep Power: 14	Take 2 cylinders with different heights and roll it down a ramp __________________

12-08-2012, 11:25 AM	#6 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 31	So any estimates on how much loss I might be looking at going frim stick to re-11s square 285. Wondering if it's worth it or not for the pros mentioned above. __________________ Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

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12-08-2012, 10:40 AM	#3 (permalink)
KERMIT Enthusiast Member Join Date: Apr 2012 Location: Republic of Wadiya Posts: 301 Drives: Ms. Daisy Rep Power: 13	Two reasons Higher rolling resistance - affects hwy mileage most Higher inertia - affects city mileage most (or any transient condition)