Hey to all, it's been long since i posted here. Anyways, would a 305-18-40 tire size fit on a 18x9.5 rims on a LT1?

 

Where are you finding that size tire? I can't find any listed on Tire Rack, etc.

A 305/40-18 is a 27.5" diameter tire.... 2 inches larger in diameter than the stock 4th Gen tires. Its going to fill up the wheel wells, give the car a definite "rake" and suck up performance like you swapped in much lowere numerical rear gears.

The only thing I see close would be a 315/30-18 BFG Drag Radial, and that requires an 11" wide rim. Nitto makes a 305/45-18 Drag Radial, but thats a 28.8" tire and wouldn't fit on your car without body work and mini-tubs. Nitto will accept putting that tire on a 9.5" wide wheel.

 

I am getting a deep dish rims with 3/12 lip on the rear and i want something thats gonna stick out. Would 295's stick out as much? As long as it doesn't rub.

 

What wheels are you going with, do you know the offset?

 

TSW Thruxton
http://www.rims-n-tires.com/rt_wheel...ton&postId=979

Rears: 18x9.5 PCD 5x120 ET 45
Fronts: 18x8.0 PCD 5x120 ET 40 Or 45

 

those wheels are the wrong bolt pattern for our cars

 

Yeah.

PWR-TRIP, you need wheels with a 5 x 4.75" (5 x 120.65mm) bolt pattern.

 

Thats really weird, I checked on the net and the ones that will fit has a red checkmark beside it. I'm confused.
http://www.rims-n-tires.com/rt_wheel...8&carYear=1995

 

You will be fine with a 5x120 pattern. I have the pattern on my car, and about every f body with an aftermarket wheel has a 5x120 pattern.

 

And I'll give you my "opinion" on fitting the incorrect bolt pattern - do not do it. Even if you don't find the lugs loosening or get vibrations from the lugs seating eccentricaly, you open yourself up to a huge liability in an accident for knowingly putting the incorrect wheels on your car.

But, its your car.... do what you want with it.

 

I get it. Thanks guys i appreciate it.

 

If you do decide to stick with the 5x120.65 pattern you are pretty much limited to the GM repro wheels (C5, Z06, ZR1, C6, etc). Unless you are willing to spend $3K on a set of custom wheels. If your on a budget, and you want to do anything unique your pretty much forced to go with a 5x120 pattern which sucks. BTW, the .65mm is about the thickness of a credit card fyi.

 

I will have to lower it for sure if i go with either 275 or 295. Few people told me NOT to go with tires over 295. But i know i can't have 295-18's with stock height.

 

youd want to lower the car if you stuck with stock wheels and tires

our cars sit so high stock

 

I'm scared lowering it here. The roads are extremly bad with lotsa potholes everywhere. I guess when you have it prof lowered it wouldn't matter with new shocks and all.