Challenger Tires / Wheel Size?

[SubLime440]

What is the maximum size tire and wheels can you fit on a stock 70 R/T Challenger. I would like to add some 15X8 or 15X10 Centerlines with 275/60-15 tires?

Any suggestions?

[vanishPt]

The biggest rear tire/wheel combo is a 15x8 with 4.75(yes,4.75) backspace., This will barely get under with a 275x60x15. Been there and still doing it!!!

[turbododge]

VanishPt: Do you have you wheel lips rolled? When I tried to use 275's, I would get rubbing on the outer fenders or springs, depending on how I had the backspacing (used spacers to experiment). It would only happen on hard cornering, but was enough to damage the tires. I didn't roll the lips because of the wheel opening moldings that would look funny.

[vanishPt]

I have the wheel lip moldings also. When I had 4.5" backspacing I had to "slightly" roll just the centers of them. If I had used a 4.75" backspace, I probably would not have had to.

[SubLime440]

Thanks, I will try 4.75 backspacing on 275/60 -15's on the back...

What seems to give you the best traction for the strip...Have you used the BFG Drag Radials / Nittos / M&H / etc....

I've heard mixed messages about the BFG's hooking up....

[AZPentastar]

What wheels are available witha 4.75 inch backspacing? Has anyone run a 225/70 15 in the front? How about a 205/70 15, or a 225/60 15? What size front wheel?

[SubLime440]

Good Point, I have not seen any 4.75" back spacing, so I went with a 4.50 " Weld Wheel and some M/T 26.5 X 11.50 X 15. Plenty of room under the wheel wells....could have gone wider...however I did roll the wheel lips slightly before. Was running the 275/50R15 BFG Drag Radial then, but the M/T's seem to hook up better (12 PSI is about right)....

[vanishPt]

Many manufactures will make up any backspace that you want. You see advertised only the STANDARD SIZES.I called Wheel Vintique, they made the 4.75 backspace at no extra cost. I placed the order thrue Summit. Wheel Vintique sent them straight to my house.

[nuts4mopars]

I had a 73' that I put 15X10's on with 50/50 backspacing. I used 275/60R15's and had to add an extra overload spring to the rear leafs as the tire would rub the wheel well on bad roads. I agree with the guys going with the 15X8's. I looked like a high school kid going down the street...Must be why a high school kid bought the car from me.

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Jimmy Pickett
68 Formula S Cuda notchback 340 4 speed
69 Formula S Cuda notchback 340-6 auto
69 Roadrunner 383 4 speed
70 Challenger convertible RT 440-6
46 Indian Chief
40 LaSalle Coupe
61 Corvette LS1 6 speed tube chassis Grand Sport suspension & brakes
94 Corvette autocrosser
...and still going