Need info on suspension upgrade.

Need to know whats the best suspension setup for a wheel upgrade( rim 18.9 tire 275-35) I have an 03 mach1 and it pulls to the left and to the right.

What tires do you have?

Need to know whats the best suspension setup for a wheel upgrade( rim 18.9 tire 275-35) I have an 03 mach1 and it pulls to the left and to the right.

I am going to take a educated guess and assume that when your reffering to pulling to the left and right, your talking about tramling.

Tramling is when your steering is guided by the road instead of the driver. This typically occures when your in truck ruts or groves in a road. Sport's cars with wide tires tend to be affected by tramling.

There is really not much of a cure for it besides fixing the road. You can do things to avoid it by going into a different lane, or avoid truck routes or roads in poor condition.

As far as suspension mods, it won't make much of a difference in preventing your car from tramling. The only thing I don't have is a K-member and tubular A arms, but everything else is done to my mustang.

You could always go with narrower tires, but that's not the point of a mustang. Also some tires are less prone to tramling than others. You might want to take a look at different tires.

it sounds as if you are trying to make your suspension fit a pre-determined rim size, which is the wrong way to go about things. typicaly speaking aftermarket suspension parts have the same demensions as the factory stuff, so your suspension will have aproximately the same demensions after changing everything (unless you have a specific purpose in mind and custom build stuff to intensionally change the suspension geometry). remember that most aftermarket parts are designed not to make a huge impact on the suspension geometry because that makes instalation more difficult. i'd recomend that you do all of the suspension upgrades that you want, and then decide on a rim diameter/ offset (that's how deep the rim mounting surface is from the edges of the rim) and tire size that best fits your car. i'd especially recomend this strategy if you intend to lower the car (something stock mustangs need anyway, the high-water-truch look isn't that appealing) but remember this: if you want huge rims on a lowered car then wheel well modification may be nessecary. if you are not able to do this yourself then a bodyshop will probably be able to do the job, but the price may be high.

I like my 18x9's and 18X10.5's rims....

idk if this is on topic... but a study by the federal gov't said that 17" rims are best for all around performance. so that includes turns...

idk if this is on topic... but a study by the federal gov't said that 17" rims are best for all around performance. so that includes turns...


Where did you get that kind of crap?:sly:

study from the federal gov't... of course that does depend on the sive of the tire... but thats supposed to include cornering and off the line, not the best in either but its right in the middle territory for both. im not really sure where i saw that tho so i couldnt tell u.

study from the federal gov't... of course that does depend on the sive of the tire... but thats supposed to include cornering and off the line, not the best in either but its right in the middle territory for both. im not really sure where i saw that tho so i couldnt tell u.


There is way too many variables in determining the best tire size and rim width and height size.

Things to consider
the roads condition
the type of road material
the weather condition
the tire material
the tire assembly
the rim material
the brakes
the friction of rubber against the road
the friction of metal bearings
the over all suspension
the roll center
the elevation and decent
the curvature of the road
the curvature of the tire..

and so forth, it would be impossible to determine the "best" tire size for all cars.

ill give that one to you lol.