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rumatt 03-05-2019 06:49 PM

Rolling resistance stats for tires
 
Does anyone do measurements and reporting on tire rolling resistance?

I'm thinking of ditching the 20" wheels on the tesla but that leaves me needing to choose some replacement wheels and tires. I was really impressed with the Michelin 4S except for the range. And I've read that Tesla's version of the 4S has lower rolling resistance and from what you can buy elsewhere. So if I order 18" wheels with 4S off TireRack, my range will only get worse.

People with the Michelin Primacy MXM4 get significantly improved range. But the tire is shit. People seem to love the Conti DWS 06 all-seasons, but I've seen some folks say the range isn't great on them either, but it's all anecdotal comments.

Thoughts on how I can search for a decent-ish tire that is slightly better efficiency wise? I'd prefer either a really high performing all-season or a decent summer tire that has better rolling resistance. (Oh and I want them quiet and comfortable as well :D)

Nick M3 03-05-2019 10:15 PM

Tirerack compares rolling resistance as MPG when they do comparisons. Low rolling resistance and good performance aren’t easily compatible.

equ 03-05-2019 10:21 PM

How close are you to using the edge of your range? It sounded like you enjoy driving the car, get some enjoyable tires. I haven't owned the primacy but test drove it, maybe 11 years ago, on an e39 530i... Meh for that car, so go from there. I did drive the dws (owned its predecessor as well as dw) those are better but they are not going to be fun/grippy/smooth as the michelin. Maybe the dw gets closer but not the a/s one.

FC 03-05-2019 10:39 PM

Quote:

Originally Posted by Nick M3 (Post 546451)
Low rolling resistance and good performance aren’t easily compatible.

This. And the eGolf proved that in my experience.

rumatt 03-05-2019 11:13 PM

Quote:

Originally Posted by Nick M3 (Post 546451)
Tirerack compares rolling resistance as MPG when they do comparisons.

Oh yeah, look at that. The DW is even lower efficiency than the 4S. And a worse tire in almost every other dimension as well.

https://www.tirerack.com/tires/tests...y.jsp?ttid=223

Quote:

Low rolling resistance and good performance aren’t easily compatible.
Sure.. but it seems like everyone puts them into just two buckets. There has to be more of a spectrum.

rumatt 03-05-2019 11:15 PM

Quote:

Originally Posted by equ (Post 546452)
How close are you to using the edge of your range?

In the winter, too close. But once it warms up and the heater is off maybe I'll forget all about my range complaints.

The 4S are pretty great. It'll be hard not to get them again unless it got me significant range savings.

Nick M3 03-06-2019 07:53 AM

Talk to me in 12 months. My problem with the high end Michelin’s is that they age out FAST. The Contis don’t seem to suffer from significant (for their use case) age related degradation.

John V 03-06-2019 08:24 AM

Why are you so focused on range? Do you regularly find yourself just a few miles away from empty between charges?

rumatt 03-06-2019 09:19 AM

Quote:

Originally Posted by John V (Post 546469)
Why are you so focused on range? Do you regularly find yourself just a few miles away from empty between charges?

Well, I don't get that low because it's not good for the battery. But I've had several times where I had to charge when I wished I didn't have to.

One cause is that I don't have a charger in my NYC parking space. I'll plan a weekend where I go to the city, then want to make a short trip somewhere, and think "crap, if I do that I'll need to charge on the way home tomorrow."

But extending the range can help even for medium distance round trips. The 4S cause 20% or more range reduction over the Primacy MXM4, which is what the 310 mile claimed range is based on. I also try to keep the battery between 80 and 20% charge. Put them together and I get about 150 miles per charge. So I can visit someone who lives 75 miles away without charging, as long as they don't ask to test drive my car while I'm there. And it's warm outside.

Once it gets warm out maybe it won't be an issue. What I'll probably do is get the 4S and start using the E46 again for longer trips.

rumatt 03-06-2019 09:22 AM

Quote:

Originally Posted by Nick M3 (Post 546467)
Talk to me in 12 months. My problem with the high end Michelin’s is that they age out FAST.

So it wasn't a good plan to leave the E46 parked outside all winter on its PSS? :speechle:


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