How fast is too fast?

[DaiShan]

Is there a way to find out what is the maximum safe speed for a car, taking into account tires, and aerodynamics and such?

 

[spanky]

just follow the speed limit. at least then u won't have to worry about speeding tickets

 

[amdskip]

Ummmm, until you can't control your car. It depends on so many different factors that there is no set speed.

 

[dionx]

fast is too fast when you cant brake in time from hitting anything in front of you

 

[DaiShan]

no, I mean technically I could control it, but I was kinda worried about the tires, you know like blowing out and flipping.

Also there were no cars on the road, it is 2 am, and this is a long straight stretch of interstate, my main concern is the tires.

 

[dionx]

fast is also too fast if you cant complete a turn or curve without deviating from the path intended

 

[Ns1]

zrated tires go up to 150 i belieeeeeeeve

 

[her209]

Originally posted by: dionx
fast is too fast when you cant brake in time from hitting anything in front of you

Agreed.

 

[DaiShan]

are many stock tires z rated? how can I tell if mine are?

 

[Zim Hosein]

Originally posted by: DaiShan
are many stock tires z rated? how can I tell if mine are?

The rating is on the tire itself

 

[Heisenberg]

Originally posted by: DaiShan
are many stock tires z rated? how can I tell if mine are?

In the tire size listing. E.g. 245/50"Z"R16.

 

[TuffGuy]

what kind of car do you have?

 

[DaiShan]

mine have 205 (I think)/50R16, anyone know how fast those can go safely?

 

[Imported]

I've hit 125 with no problems on my SP Sport A2s from Dunlop. They're H rated though, 130mph. I usually drive around 85-90 though..

 

[DaiShan]

can anyone tell me if it is safe to use the tires I mentioned at speeds around 140?

 

[chickendinner]

Its might be safe but i would not do it on those tires.

 

[DaiShan]

So you think there is a good chance that they can tear apart or something? (I don't think I would want tire separation at that speed)

 

[Heisenberg]

I still don't know what the speed rating for the tires is. The 'R' just stands for radial. Keep looking on the tire. Also, what kind of car is it?

 

[DaiShan]

I will check again when it is light outside, maybe I missed something with the flashlight, it is an accord v6 btw (I know I know, but really I just want to know if there is a chance the tires will explode on me) Also the more you do it, does it wear the tires down more?

 

[IGBT]

Posted speed limit. If the safety of your ride is in question fault on the side of safety and get it to a dealer so a safety inspection can be done......ok???

 

[DaiShan]

I know what you are saying IGBT I see too many junkers driving down the interstate with parts falling off, my car is is good shape, never missed a maintenance, I am more concerned about the maximum for it under the best conditions.

 

[Oneiric]

I sorta wish we had autobahns here in america like in germany. I go there every summer and they drive so fast its crazy. I mean multiple times the person I have been driving with has hit 180 kmph.

 

[Heisenberg]

Originally posted by: DaiShan
I will check again when it is light outside, maybe I missed something with the flashlight, it is an accord v6 btw (I know I know, but really I just want to know if there is a chance the tires will explode on me) Also the more you do it, does it wear the tires down more?

Umm...no offense, but I seriously doubt if it will get close to 140. Especially if it's stock. Manufacturers usually will put tires that have speed ratings appropriate to what the car is capable of or in most cases limited to. If the limiter is set to 130, then H (rated at 130) rated tires are used. Even if you can, I would not recommend exceeding the speed rating for the tire, unless they are high-performance to begin with and you only do it under certain circumstances. The speed rating is really a measure of the tire's ability to dissipate heat. My tire's are H-rated (Comp T/A's), and I wouldn't have a problem doing 140-150 on them for a short period of time on a cool day. I wouldn't try that on tires from Wal-Mart, though.

 

[CocaCola5]

Use the 75% rule, if your top speed is 150, your safe speed is 112.5mph.

 

[Oneiric]

just as I sent my last message I realized I forgot to say how great the cars are in germany as well. Everyone can afford a Mercedes there because its manufactured there. VW's are still the cheapest but who cares I just got a jetta myself and they are soooo beatiful. Run just like the real deal Audi.