Another wheel and tire question?

[72_Scamp]

I just picked up some 14" sbp rally wheels and would like to know how big of a tire I can put on the rear of my 72 Scamp without any rubbing issues, I have searched all over the site and I can't seem to find anything out, any help would be much appreciated, thanks in advance.

 

[terzmo]

I have 245 by 60 by 14 on My Demon and there is still room

 

[Oklacarcollecto]

I just picked up some 14" sbp rally wheels and would like to know how big of a tire I can put on the rear of my 72 Scamp without any rubbing issues, I have searched all over the site and I can't seem to find anything out, any help would be much appreciated, thanks in advance.

How wide are your wheels? That will limit the size of your tires.

 

[72_Scamp]

To be honest I haven't measured and really not sure how to.

Sent from my Nexus S 4G using Forum Runner

 

[Oklacarcollecto]

To be honest I haven't measured and really not sure how to.

Sent from my Nexus S 4G using Forum Runner

With the tire off you measure between the beads a/k/a the inside lips of the wheel.

 

[72_Scamp]

I just realized you asked the width and not back spacing, they have tires mounted to them so I can't measure them right now.

Sent from my Nexus S 4G using Forum Runner

 

[66340SEDAN]

P245/60R14 is the biggest radial tire that you can get, and yes, it will fit your car.

 

[Oklacarcollecto]

I just realized you asked the width and not back spacing, they have tires mounted to them so I can't measure them right now.

Sent from my Nexus S 4G using Forum Runner

You should be able to take a wheel with the tire on it to a tire shop. They have a tool that tells them the width without removing the tire. The tool is used to determine the wheel width for balancing. If you have the OEM Mopar factory rally wheels they should be 5.5 inches wide. If that is correct maybe posting a thread as to the biggest tire that you can safely put on that wheel might get some good answers. You would hate to wipe out a quarter panel, paint or an expensive piece of wheel well trim because you used a tire that was too wide for the rim. I have stuck all kinds of tires on my junk cars because I didn't care what happened. I have had them blow out from it too from the buldges on the side wall causing uneven tread wear.

Tire Specs Explained: Rim Width Range

Rim Width Range

Because tires have flexible sidewalls, a single tire size will fit on a variety of rim widths. A tire's rim width range identifies the narrowest to the widest rim widths that the tire is designed to fit. The width of the rim will influence the width of the tire. A tire mounted on a narrow rim would be "narrower" than if the same size tire was mounted on a wide rim. NOTE: Because the overall diameter of a steel belted radial is determined by the steel belts, there is little, if any, change to the overall diameter of the tire due to differences in rim width.

The industry rule of thumb is that for every 1/2" change in rim width, the tire's section width will correspondingly change by approximately 2/10".

For example: a tire in the P205/60R15 size is measured on a 6.0" wide wheel and this size tire has an approved rim width range from 5.5" to 7.5" wide. The tire has a section width of 8.23" (209mm) when mounted on a 6.0" wide wheel. If that tire were mounted on all of the rims within its range, the tire's approximate section width would change as follows:


Go to http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=198 and there is a chart showing what is correct along with this information.

Because of the different wheel widths used in the above example, there is a 8/10" projected difference in tire section width when comparing a tire mounted on the narrowest rim to the widest rim within its range. This may affect fenderwell and frame clearances when selecting optional aftermarket wheel and tire packages.

Additionally, some vehicle manufacturers and tire companies have permitted rim widths that are not within the tire's original approved rim width range. For example: BMW has combined 235/40R17 sized tires on 17x7.5" rims (which are 0.5" less than the narrowest 8.0" wide rim listed for the size) on certain M3 models; and Chevrolet has combined P255/50R16 sized tires on optional 16x9.5" rims (which are 0.5" wider than the 9.0" wide rim now listed for the size) on certain Corvette models. While these applications have received the approval of the vehicle and tire manufacturers, staying within the approved rim width range helps assure that the tire's internal stresses are within its design parameters.



This information is off the Tire Rack web site 14x7 Recomended Tire Size:205/75-14

------------------------------------------------------------------------------------------
Results for a 245/60R14 using calculator below.

I posted the link right under this line so you can check it.

http://www.1010tires.com/tiresizecalculator.asp?err=98&rsn=usr-snt-emty-str

Stock Tire - 245/60R14

Section Width: 9.64 in 245 mm

Rim Diameter: 14 in 355.6 mm

Rim Width Range: 7 - 8.5 in

Overall Diameter: 25.57 in 649.47 mm

Sidewall Height: 5.78 in 146.81 mm

Radius: 12.78 in 324.61 mm

Circumference: 80.33 in 2040.3 mm

Revs per Mile: 813.4

Tire Models Available by Size:

BFGoodrich Radial T/A

P245/60R14 is the biggest radial tire that you can get, and yes, it will fit your car.

This is correct as long your wheel will accept that size tire

 

[66340SEDAN]

If they are factory original SBP Rallye wheels they only came in one size, 14x5 1/2"

Check to see if there is a part number near the valve stem base stamped into the rim, if there is a 7 digit number it is original.

I ran these original rims with P245/60 14's before with no problem.