2w0s060

I posted this in the wheels and tires and got no response...maybe someone can help me here...

The car is currently running 4.56's running a Nitto 315/35/17 on a stock WS6 wheel. I am looking to purchase a set of four Weld Pro Stars 15" wheels. The problem is while I am crossing the line we are hitting rev limiter in 4th or shifting into 5th. A 4.10 gear would actually be ideal. What I would like to know is what rear tire size will lower the car to approx. a 4.10? I will be running the MT ET Radials. Also what back spacing is going to be needed?

Thanks

aram

iTrader: (7)

Use a racing calculators like those available on tciauto.com to figure that stuff out.

BlueSix

You're gonna need about a 28" tall tire.

1QuickT-A

iTrader: (12)

A 28in tall tire should do the job.. 275/60 MT DR is suppose to be a 28in tall tire.

2w0s060

Thanks for the info, thats what I was thinking as well.

Anyone know the correct off set for the wheels?

sprayinss

iTrader: (2)

get the bs 5.5 to the inside,hope this helps

Bhogan909

iTrader: (6)

28" tall tires are exactly what you need. 275-60-15 MT ET Radials or 28" otherwise
If you get 8" wheels get 5.5 bs and if you get 10" wheels get 7.5 bs
Hope this helps

2w0s060

Thank you and yes that helps alot.

Is there any reason I can't run a 315/60/15 MT Drag radial? There is a adj. panhard bar installed and I am currently running a 315/35/17 Nitto

Thanks!

Jake the SSnake

iTrader: (11)

Ehhh.... I think that comes out to be 30 inch tire (mini tub/LOTS of cutting).The 325/50/15 mt dr would work good and fits with a little massaging/bfh.Its 28 inches tall

2w0s060

60 represents the height of the tire and 315 the width correct? So a 315/60 would still be a 28" tall tire but wider. But I can see where the width would be to wide for the height and cause extreme rubbing on the fender wells...thats why I was curious. To get a 30" tire I think series would be higher like 65 or 70

Someone correct me if I am wrong

Jake the SSnake

iTrader: (11)

315 is the width and 60 means 60% of the width.Try this calculator http://www.f-body.org/gears/

1QuickT-A

iTrader: (12)

If you go to Mickey Thompson's website you can look at all of the different slicks/drag radials and the sizes.. The 315/60 is 30 inches tall.. The 325 is only 28 inches tall. They are both in the 13-13.5 inches wide range.

Jake the SSnake

iTrader: (11)

Heres a good explanation from the tirerack

Section Width

Following the letter(s) that identify the type of vehicle and/or type of service for which the tire was designed, the three-digit numeric portion identifies the tire's "Section Width" (cross section) in millimeters.

P225/50R16 91S

The 225 indicates this tire is 225 millimeters across from the widest point of its outer sidewall to the widest point of its inner sidewall when mounted and measured on a specified width wheel. This measurement is also referred to as the tire's section width. Because many people think of measurements in inches, the 225mm can be converted to inches by dividing the section width in millimeters by 25.4 (the number of millimeters per inch).

225mm ¿ 25.4 = 8.86"

Sidewall Aspect Ratio

Typically following the three digits identifying the tire's Section Width in millimeters is a two-digit number that identifies the tire's profile or aspect ratio.

P225/50R16 91S

The 50 indicates that this tire size's sidewall height (from rim to tread) is 50% of its section width. The measurement is the tire's section height, and also referred to as the tire's series, profile or aspect ratio. The higher the number, the taller the sidewall; the lower the number, the lower the sidewall. We know that this tire size's section width is 225mm and that its section height is 50% of 225mm. By converting the 225mm to inches (225 ¿ 25.4 = 8.86") and multiplying it by 50% (.50) we confirm that this tire size results in a tire section height of 4.43". If this tire were a P225/70R16 size, our calculation would confirm that the size would result in a section height of 6.20", approximately a 1.8-inch taller sidewall.