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Thread: Acceleration: Winter vs. Summer Tires.

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    Senior Member daniel's Avatar
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    Acceleration: Winter vs. Summer Tires.

    Today I had the summer tires put back on my Roadster (2.5 non-Sport). And boy, did the acceleration ever jump. It seemed to me that it was slower with the snow tires, and I always noticed the tc icon on the dashboard when I floored it, even when there was no slipperiness on the road. I thought the snow tires were supposed to be stickier. But now with the summer tires again, the tc icon is gone and I can feel that old acceleration that I remembered from last summer. So I guess on dry pavement the snow tires don't have as much traction. I suppose I shouldn't be surprised. Racing cars use slicks if the track is dry. I guess snow tires have less rubber on the road, in exchange for the ability to grip on snow.

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    Senior Member cinergi's Avatar
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    I never have TC kick in when I'm straight-line accelerating with my Hankook winters ... Not that im recommending them (for other reasons).
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    I drove from Seattle to Oakland and back on snow tires from the Tesla Store, and I did not see any additional TC. However, the car felt looser, and I'm sure I could feel a difference in stability - no doubt due to the taller tread with way more siping. I'm back on the standard tires now, but I don't regret having the snow tires for winter extremes.

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    Roadster 919, S 2006 Doug_G's Avatar
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    I've not noticed any TC events with the Pirellis on dry pavement.

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    Senior Member daniel's Avatar
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    Very odd. I certainly have no regrets about using snow tires in winter. It's a safety issue. I got the tires from Tesla, the ones they recommended for winter. But I have considerably more acceleration now that I'm back on the summer tires.

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    It'll depend on a variety of factors. Winter tires suck at wet roads, for instance, and will water plane in an instant. Are you completely sure the road was absolutely dry?

    Winter tires also use a rubber mixture intended for colder temperatures, which means that at higher temperatures they are stickier. This isn't necessarily a good thing, because you might just end up losing rubber instead of moving you forward. Too soft isn't any better than too hard.

    (I just checked some tests done on winter tires - at 50 mph at 26 C, the braking distance was 14.5 meters/40 feet longer than at 6C. And at 60 mph in summer, the braking distance on dry asphalt was around 34 meters/100 feet longer than good summer tires. That says something on the amount of traction you've lost.)

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    Roadster 2.0 VIN939 djp's Avatar
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    I put my summer tires back on today. Both acceleration and handling are noticeably improved and the car is a lot more fun to drive - I was grinning all afternoon. I didn't see TC light up very often with the snows, but I think the deeper treads made the car feel more "squirmy" on fast starts and corners. It's nice to have my old Roadster back!

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    Roadster 919, S 2006 Doug_G's Avatar
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    Me too. Beautiful warm day, more of the same forecast for the whole week, definitely time to switch back to summer tires! If we get a snowstorm I'll park the car for a day or two.

    The car handles much better with the summer tires. Also nice to stop getting the TPMS failure messages every time I took the car out.

    (Funny thing... sometimes when I started up in the garage I would get low tire pressure messages for my fronts. Those tires weren't on the car, they were on the tire rack! Of course I pumped them up when I reinstalled them.)

    Man did this winter ever fizzle!

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    Senior Member Jaff's Avatar
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    Same here (on Hankook's)...

    Quote Originally Posted by cinergi View Post
    I never have TC kick in when I'm straight-line accelerating with my Hankook winters ... Not that im recommending them (for other reasons).
    Member Southern Ontario Tesla Owners Club

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    Senior Member Jaff's Avatar
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    Careful now Doug...we don't want to tempt fate...

    (Got to admit though, I'm thinking along these lines as well.)

    Quote Originally Posted by Doug_G View Post
    Me too. Beautiful warm day, more of the same forecast for the whole week, definitely time to switch back to summer tires! If we get a snowstorm I'll park the car for a day or two.

    The car handles much better with the summer tires. Also nice to stop getting the TPMS failure messages every time I took the car out.

    (Funny thing... sometimes when I started up in the garage I would get low tire pressure messages for my fronts. Those tires weren't on the car, they were on the tire rack! Of course I pumped them up when I reinstalled them.)

    Man did this winter ever fizzle!
    Member Southern Ontario Tesla Owners Club

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