mkhuffman
Well-Known Member
- First Name
- Mike
- Joined
- Nov 19, 2020
- Threads
- 24
- Messages
- 6,175
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- 8,149
- Location
- Virginia
- Vehicles
- 2021 MME GT, Jeep GC-L, VW Jetta
Wow. Thanks for the info. Your setup is lighter than I thought that it would be. What do you think is the primary contributor to your 10% range hit?
I have done some research into this and tire width probably has a minor impact. Rolling resistance and wheel aerodynamics are likely why you are seeing a 10% hit. I am willing to bet you see a 1% improvement with narrower tires, assuming you use the same tires. If you get a low rolling resistance tire, you might knock of 5% of the hit. The other 5% is probably because the wheel is not aerodynamic.With just the eye ball test, the new tires are sooo much wider,(especially the rear 295), and they are also a little taller than OE set. I'm sure there is an engineer on here someone that can give the scientific answer. Probably takes more energy per rotation of the tire. You also have to consider you will now be paying 10% more each day, which I didn't initially consider. But it looks great, rides much better, and next time just do either 255-265 all around to see if I can get it to a 3%-5% range hit. To be honest, if you go 245's that would probably do the trick, but that's why I like this forum where you can get feedback from many other setups. To each their own. At least I have a Mach e to experiment with
All this depends on the speed you are driving. At less than 25 mph, your wheels probably don't negatively impact range. At 70 mph, they definitely do. Rolling resistance impacts range at all speeds. Weight has almost no impact. Weight only impacts energy needed to accelerate, but some of that penalty is captured with regen braking.
Read this for a more complete explanation:
https://www.macheforum.com/site/posts/308996/
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