My 2005 super crew comes with 265x65x18 tires. I would like to get to a 70 series tire. I am guessing that i will need different wheels also. As soon as you get to the 65, 60 etc. series tires, you will have shaking problems. Every car I have had since 2004 has had shaking probelms. Anyway, do I have to change wheels?

 

Hi you shouldn't have to change rim size you can go to a 70 series tire i have 2007 4wd and have 275 70 18 tires on my stock truck.

 

Explain to me what I've bolded. I've run many different aspect ratios over my years of driving, from 50 series to 75 series and I've never found that a larger aspect ratio led to more speed related vibration.
Not to mention, you say you want to go to a 70 series from a 65, but state that going to 65, 60 etc causes the shaking. Soooo what would be your concern? Based on your logic you should be fine...and you will be fine with a 265/70/18.

 

I have to agree with Chandler here this doesn't make much sense. I actually increased my tire size and got rid of the vibration I had originally. In my experience its not the tire size but the different tires themselves and who mounts them that makes the difference as to whether or not they shake and vibrate.

I originally had the Goodyear Wranglers that a fair number of people get from the factory and removed those junks and replaced them with nittos and have loved them. No vibrations, shakes, or etc.. and I increased about 2-3 sizes from what the stock ones were.

 

A change to 245/70R/18 will be a tire only 0.19% smaller than the ones you have.
Go here and scroll down to the calculator for comparing sizes.
Car Bibles : The Wheel and Tyre Bible Page 4 of 4

 

I have a Toyota Siena now with 65 series tires that "shake" and balancing doesn't fix it. Sometimes they shake and sometimes not. I had a 2004 brand new Dodge Avenger with at least one bad tire when I got it and they could never get the shake out of it(65 series also.) Now this Ford truck. I read online about the problems with the 65 and wider series, that they have an instability problem. I read this on the Dyan Beeds web site. That is all I know. I never had these kind of problems with 70 or 75 series tires.

 

I am not trying to come of mean but you are not making sense if you do not have problems with a 70 series or higher then go to a 70 series and stop messing with the 65's. You sound like you are trying to fool yourself to save money. Go to a 70 or higher like you just told us you have never had problems......

 

 

That is what I am saying, go witht the 70 series. My original question was will I need to change rims also. I know I might have rambled on, but I get irritated about those tires. sorry.

 

No you will not need new wheels. What you currently have is fine with a slight upsize.
Good luck.

 

I made a mistake. My truck tires are 60 series. I just got off the phone with a tire dealer and he says they don't make a 245-70-18. Does anyone know of any?

 

Just about every car built since 2004 is equipped with lower than 70 aspect ratio tires. All of them do not shake. Most of them do not shake. All of your cars shake.

I've been running 245/45 17 fronts and 275/40 17 rears on my 2004 Mustang Mach 1 since 2004 it has never shook. (The fronts are OEM size.)

My 2005 Subaru Legacy GT has 45 series tires. It doesn't shake. The winter wheels have 45 series winter tires. No shaking, either.

What makes me think there is something you're not telling us? Why would EVERY car you've owned since 2004 shake?

 

So you want to go from a 265/60/18 to a 245/70/18?
I checked Tirerack.com and no one makes a 245/70/18, a comparable size would be a 255/65/18 but the only options there are small SUV/Crossover options and they are extremely road biased.

Why are you wanting to go with a narrower tire? Are you really that hell bent on changing the aspect ratio because you've had previous issues with balancing tires with a lower aspect ratio?

My advice to you is to stick with the tire size you have, and spend the extra $$$ on a reputable tire maker's tires. Any shop can speed balance a wheel/tire combo, but good shops will road force balance them if you request it. So request it if you want.

 

Go to tirerack.com and do a search.

You could also see if someone wants to swap their 17" wheels for your 18" ones. When you start reducing sidewall height the ride tends to stiffen a little.

 

I guess I am the lucky(or unlucky) one. I checked other forums about this problem and others have had the same problem. The Dyna Beeds web site makes mention of this problem in those series tires. I have had the road force balancing on my Toyota Sienna and it hasn't helped. It comes and goes.