The sport model has those wider front tires...
Last edited by TEG; 06-08-2010 at 06:23 PM.
Ah thanks TEG, I stand corrected yet again!
I guess going up to 17s in the front isn't the best idea too unless you want to order another pair from Tesla or go aftermarket. A set of OZ Ultraleggeras or Enkei RPF1s sound tempting in reducing unsprung weight. Of course this goes back to the original dilemma of calling to question Tesla's motives and research.
On that note:
- Does anyone know the current bolt pattern and offsets for the front and rears?
- For fun, anyone try to weigh the wheel and tire together?
Just keep in mind that one of Tesla's goals was efficiency/range, so absolute max performance wasn't the only criterion. Narrow tires tend to have less rolling resistance.
Yes you are right, but I was trying to elude to the notion of reducing unsprung weight as much as possible. Asides from a less smooth ride are there any negatives to opting for light weight wheels? The Ultraleggera and RPF1s are some of the lightest wheels available via the aftermarket, I just wonder why automakers never opt for them more often.
The reason why I asked about stock wheel weight on the Roadster was since part of Tesla's priority was efficiency and range, assuming that the tires are in the low to mid 20s (in pounds), can we expect the wheels to be around 13 to 17 lbs (which is the case for both alloys above)?
I think the main ones are more cost and (in some cases) less strength....are there any negatives to opting for light weight wheels?
Considering the range of costs and weights...
You could go exotic with carbon fiber wheels.
Forged aluminum wheels are desirable.
Cast aluminum is common, less expensive than forged but tends to weigh more.
Then there are the old cheap steel wheels that some low cost and trucks cars still use...
I put the 205/50 16" (Hoosier A6) on the front of my Sport model for autocross purposes. That along with adjusting the sway bars and shocks reduced the understeer in corners. The "new Tires" setup in the main console was neccessary to get back my regen braking and worked flawlessly for this tire. I don't know how far off in diameter you can go and have the new tires setup work.
Typically cars are set up from the factory with understeer. Understeer is where the front of the car resists turning even when you are trying to steer the car sharply. Oversteer is where the rear end spins out and can cause total loss of control. For the average driver understeer is safer and will result in less accidents.
Are the 205 wide tires neccessary for a street application? In my opinion, no. Just drive the speed limit and there are no problems. On the other hand if you are "playing" with the speed limit around a high speed turn with a cliff on the outside and the front end pushes, your only choice is to slow down or get lucky.
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