For those of you who have an opinion, how much if any handling is lost with the smaller wheel? How close are the slalom and skid pad specifications between these two options?
You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
For those of you who have an opinion, how much if any handling is lost with the smaller wheel? How close are the slalom and skid pad specifications between these two options?
It's confidence, not handling, that is lost in the 19".
There isn't much point in trying to slide a Tesla around, but it would be great if at some point we could at least use the grip the tires are good for.[/QUOTE
So if you are saying confidence and not handling is lost with the 19s, would the speed be the same through a slalom or skid pad as with the 21s? Would tire squeal through a turn begin to occur at the same speed with either size?
It's confidence, not handling, that is lost in the 19". The car is heavy and any sidewall flex is going to get loaded during transitions/corners. I don't think there is any evidence of a single thread on TMC that resolves this to be an understeering, or oversteering, car because about the only way a Tesla will let that happen is if you have RWD, and deliberately turn off traction control, or go into a turn so fast that cranking the wheel scrubs your front tires to a state of understeer (which can be done with just about any car). I have a set of PS2 21's, to try this summer, but am not confident I'll even be able to find "at the limit" characteristics with those, either. So, I sort of expect the exercise might prove the Conti Silents are what to stick with.
There isn't much point in trying to slide a Tesla around, but it would be great if at some point we could at least use the grip the tires are good for.
@CHG-ON Have you ever lost grip with the road on your 21's taking a hard turn or corner? Do you like the Hankooks?
I just had the Conti 21's switched back onto my MS for the summer from the 19's. I can also attest to the grip and shear confidence in the feel of the 21's vs. 19's. Maybe it's me or it's just in my mind, but it does seem to hug corners and turns with more vigor with the 21's.
I can recall an afternoon last month in which I was accelerating hard on an on ramp to a highway on the 19's and the feel was noticeably different from the 21's. The grip was there in the turn of the ramp before it straightened out just not as crisp handling the weight of the vehicle. I felt maybe even drifting a tad to the left not grabbing the road as well as on the 21's. It has been my first season or winter on the 19's since acquiring them as I have been accustomed to the feel of the 21's for over a year.
You need an alignment to lolachampcar's specs.Wait, what? A Model S has massssssssive understeer.
You need an alignment to lolachampcar's specs.Particularly, if you give the car a kick while you're in any sort of a curve, the rear end will get waggly very easily (RWD P85).
Do you feel a lot of that performance of the 70D with 21" Continentals over a snowy pass was due to the fact that the 70D is all-wheel drive? It would probably be a different experience in your P85 on 21's in any snow.
Since we're here and on the topic, have you ever driven in snow on the 21" Conti's in your P85? And if so, what was your experience?
You need an alignment to lolachampcar's specs.
That is exactly true. Understeer is equal to the rear axle pointing straight overruling the front wheels pointing into the turn.
Now what could one do to increase understeer in a Model S:
Run wider tires in the rear - check
Run significantly more negative camber in the rear - check
Run significant toe in in the rear - check
Put more weight on the rear axle - check
To reduce understeer, listen to Lola!
Please correct me if I'm wrong, but doesn't Lola reccommend setting rear camber to -1.0 degree from the stock ~ -1.95 or so? So how do the two statements you just made here jive?