MustangEater82

I ahve read about different rear axle bump stops, and a different sized one for 17s, are they really needed?


Also what tire do you reccomend, I am trying to avoid wheel gap...


275/40/17 ?

chuck

All you need to do is bolt them on. For some reason SLP put spacers under the bump stops on their cars, but I have been running without them for a long time with 17x9 and 17x11 wheels.

Changing to 17x9's is not going to close any wheel gap as the suggested tire is 275/40/17, which is the same height as the stock 245/50/16. You will need to lower the car with springs to change the wheel gap.

teke184

275/40/17

firestone firehawk sz50

on sale now for $150

5.0THIS

be prepared for the unsprung weight gain

MustangEater82

I am

cool, I know idealy they would be the same diameter just didn't want ot increase the wheel gap any...

Thanks for the help...

stereomandan

They look like they are about $175 to me. Am I missing a sale?

Dan

chuck

You say that like it is a bad thing. My car has gotten faster in the turns with each increase in unspring weight (from stock 16x8 to 17x9 to 17x11).

V6Bob

Taken by itself, unsprung weight is always a bad thing. Bumps upset the car more. It's why our live axle is a disadvantage.

What compensates for that is better tires, in several ways. I'll bet your car went around corners faster mostly because you got stickier tires when you changed wheel size. Some because the shorter sidewalls were stiffer. And a little because you had wider tires.

chuck

Actually I took a step down in tire from a 275 Victoracer to a 315 Nitto drag radial, but 17's, and both the same overall height (and sidewall height).

bruecksteve

My 17x11's (24lbs) weight 4.5lbs more than my stock 16x8 wheels (19.5lbs) did. Throw a 315 Hoosier into the mix (25.5lbs) (I don't know what the stock tires weigh, but probably close to that) and I'll take the few extra pounds of unsprung weight ANY day!!!!!

5.0THIS

That's because it is a bad thing Maybe you got faster because you went to a wider tire

bruecksteve

But everything is a trade-off. Unless you spend an enormous amount of money to get extremely ligh wheels, you're going to see a weight increase when going to wider wheels. But that doesn't mean that the increased weight isn't offset by the much higher cornering forces. That's much like the discussion we've had up here about the weight of the 35mm front bar, yes it weighs 15lbs heavier than the stock bar, but for most of us (see how I said that Mike! ) the weight disadvantage is far offset by the much improved handling characteristics. Now I'm sure if someone made a titanium 40mm front bar for $100 we'd all be happy!!!!

rskrause

I am using 285's on the back with 17x9" wheels and it works well.

Rich Krause

MustangEater82

what do you guys think of

Kuhmo Ecsta 712s 285/40/R17
$116 a tire...

Decent ratings...

http://www.tirerack.com/tires/tires....CSTA+Supra+712


Also I might be able to get these local usually the same price as listed on tirerack, so I woudl save $50 on shipping.

MustangEater82

they also have the 712s in 275/40/R17

for $107

and sumitomo HTRZ II

for $119

rating is pretty good too...
http://www.tirerack.com/tires/tires....Model=HTR+Z+II


here is a comparison between the 2....