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Thread: standard tires on 2.5

  1. #21
    Junior Member SteveTheTech's Avatar
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    Over the last few years I have seen many tire related threads, but this one is more interesting than the usual, it is just such an odd size. All I see now is 18+".

    I'm curious to see the alignment angles of the roadster. Does anyone have a scanned printout handy?

    How are these tires wearing, inside, outside, featheredged?

    The tires that are pictured have tread blocks that are far too solid for a daily driver in anything but ideal conditions.


    http://www.tirerack.com/images/tires...o_as_ci2_l.jpg

    If I had to choose between the two I would prefer the wider aspect ratio and slightly smaller sidewall. The Michelin Exalto is a decent tire on passenger cars but how it would act on a Roadster remains to be seen.

    Continental has several offerings in the larger size.


    http://www.google.com/products?q=195...nd=Continental


    The Contis have the ablility to be cross rotated regularly, which in theory should prolong them. Also the ones in the photo above have blocks that look like they would tolerate the negative camber better than the factory tires.

  2. #22
    '08 #383 SByer's Avatar
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    Quote Originally Posted by kgb View Post
    What tires did you have?
    How many miles did you get?
    Did they handle and stop well?
    Were they noisy?
    Was there a catastrophic failure, ie blow out, etc...?
    What did you get to replace them?
    How much for new tires?
    I had the performance tires for the first year on my '08. Now I've got the standard. The performance tires were indeed noisier, and didn't even make it to the end of the year before I started hearing/feeling the wear bars (which you notice a whole heck of a lot more in an EV!). Didn't have a problem in the rain with them, but I was aware to watch for that. I got maybe 3500 miles out of that set - the fronts had more life in them, but I didn't want to mix-and-match with the standard, and I'd already decided to switch.

    With the standard tires I notice a bit better energy usage - but that could also be training from the nanny graph. I do notice the TC coming on a bit more - especially accelerating out of corners from a right turn at a light - but not enough to go back to the performance tires. I'm guesstimating I'll get about 10-12k out of the rear standards, which is about what I was getting out of the rears on the 911 (and before that the MR2). It's a condition of mid-engine/battery cars (is the Roaster technically mid-motor?).

    As for stopping, I rarely use the friction brakes, so don't ever push the tires in that way (I like to say I'm an asymmetric hyper-miler). Someone who's had the car on a track with both sets of tires could answer that better than I.

    The replacement tire cost seemed perfectly reasonable to me (about the same as for the 911).

  3. #23
    Sam C samcarney's Avatar
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    Quote Originally Posted by kgb View Post
    Let's make use of this Tire Thread: Everyone who has perfomed at least 1 tire change answer the following questions:
    What tires did you have?
    How many miles did you get?
    Did they handle and stop well?
    Were they noisy?
    Was there a catastrophic failure, ie blow out, etc...?
    What did you get to replace them?
    How much for new tires?
    Roadster 2.0 standard Yokahama's
    Rears replaced at 8400 miles. Fronts still good at 11300
    Tires handled excellent wet and dry
    They got noisy as they began to wear out
    No catastrophic failure
    Replaced with same
    Price for 2 rear tires $550 +$50 installation
    Last edited by samcarney; 2010-10-06 at 08:35 PM. Reason: cost $550 not $650

  4. #24
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    Quote Originally Posted by kgb View Post
    Let's make use of this Tire Thread: Everyone who has perfomed at least 1 tire change answer the following questions:
    What tires did you have?
    How many miles did you get?
    Did they handle and stop well?
    Were they noisy?
    Was there a catastrophic failure, ie blow out, etc...?
    What did you get to replace them?
    How much for new tires?
    08 Roadster with 19,500 miles.
    Just ordered my 4th set of standard rear tires. Original fronts still have plenty of life remaining.

    Getting 6,500 miles per set of rears +/- a few hundred. First set had lots of test rides and 36 laps of auto cross plus drag strip time so I blamed it on that. Second set with no auto cross or drag strip and more normal driving proved to be no better.

    Tires have amazing traction in both wet and dry conditions. (But are useless in snow)

    Do not consider the tires noisy until the end of tread life, but they are very sticky and shower the bottom of the car with any loose road debris.

    No failures.

    Replaced with same.

    $536 from Tire Rack

  5. #25
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    Barring other longer life tires, performance or otherwise, what other wheels would fit the Roadster that can take a longer life tire?

  6. #26
    Member tomsax's Avatar
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    Tires: Stock base tires on an 08 Roadster.
    Miles: 11,937. They were still above the wear bars, but I wanted new tires before driving to Portland for drag racing.
    Did they handle and stop well: By my amateur standards, yes. A pro driver who drove it at Pacific Grand Prix gave high praise to the car.
    Were they noisy: road noise on the freeway is the worst thing about the car.
    Was there a catastrophic failure: No, probably could have lasted another 1,000 miles.
    What did you get to replace them: Same.
    How much for new tires: Not sure, I did the 12k service at the same time. The total was ~1,300, which is consistent with 600 for service plus 600 for tires, but I don't have the invoice handy.

    I've heard that the traction control is tuned to the standard tires. Tesla had to update the firmware and add a tire setting when they started selling winter tires. If you go with something other than the stock tires, especially different sizes, beware of possible traction control problems, like TC turning regen off when slowing.
    Tom Saxton
    Nov 30 2006 to Jun 5 2009 - A long wait for an awesome ride.

  7. #27
    Senior Member Jaff's Avatar
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    Thanks for all of your responses guys, some great case study info here for we noobs!
    Member Southern Ontario Tesla Owners Club

  8. #28
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    Quote Originally Posted by TEG View Post
    Also, as a reminder - go easy on brand new tires. They tend to have less traction at first until the molding compound wears off.
    I want to reiterate this. I spun out and got in an accident with only 10 miles on a new set of rear tires because of this. It was this reason plus the fact that the TC needs up to 50 miles to recalibrate with a new set of tires.

  9. #29
    Electrics are back mpt's Avatar
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    What tires did you have? Standard
    How many miles did you get? Front less than 50% worn at 11K, Rears done after about 6K
    Did they handle and stop well? yes
    Were they noisy? Yes
    Was there a catastrophic failure, ie blow out, etc...? No
    What did you get to replace them? 225/45ZR -17 Sumitomo HTR Z II
    How much for new tires? $76 each

    Now, I think that they might not be as good as the originals; perhaps if I did a double blind test I might be able to spot the difference but probably because they're quieter. I reasoned that at 6K per set, I wasn't feeling good about spreading all of that money around the roads of New Jersey. 4K miles in though (*) and they still only look 50% worn so for me they seem a better solution.

    No issues with regen or TC.

    * I didn't say I actually changed them when they'd worn out though; at that rate of wear, if you don't check every day they can slip by!

    WARNING: Danger of Electric Shock! Vehicle may accelerate quicker than anticipated.

  10. #30
    Member tomsax's Avatar
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    Quote Originally Posted by Tdave View Post
    I want to reiterate this. I spun out and got in an accident with only 10 miles on a new set of rear tires because of this. It was this reason plus the fact that the TC needs up to 50 miles to recalibrate with a new set of tires.
    Does this mean that Tesla has upgraded the firmware to be more tolerant of different tires?
    Tom Saxton
    Nov 30 2006 to Jun 5 2009 - A long wait for an awesome ride.

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