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Discussion Starter · #1 ·
So after trusting a few people saying I wouldn't have clearance issues with a set of 305/45/17s MT Et Streets on my Welds- I ordered some and had them mounted. Annnnndddd I have major clearance issues. You cant do a slight launch let alone a hard launch on the car without the tires rubbing on the outside of the fenders. So today I went and talked to a guy who rolls fenders who told me I wouldn't get the clearance I'm after and that there are other risks with damaging the fender trying to get the clearance I'm after. He mentioned I could try a taller and stiffer spring. Has anyone had any success doing this? I have at best maybe a half inch of clearance between the tire and the fender. Its starting to see like my best option now is to take a loss on these tires and sell them for a set with a much lower profile.
 

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You can try a base model cts spring. Another local guy did that.

 

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What size and offset are your wheels? The 305/45/17 has a 27.9" diameter and 11.9" section width. I run 305/35/18 with a 26.6" diameter and 12.2" section width without any rubbing. Your diameter is 1.3" bigger, but my tires are a hair wider and still fit inside the wheel well. That's why I'm wondering if you might have coupe wheels.
 

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Discussion Starter · #4 ·
What size and offset are your wheels? The 305/45/17 has a 27.9" diameter and 11.9" section width. I run 305/35/18 with a 26.6" diameter and 12.2" section width without any rubbing. Your diameter is 1.3" bigger, but my tires are a hair wider and still fit inside the wheel well. That's why I'm wondering if you might have coupe wheels.
Im not sure. I was trying to find that info for my set of Welds but never could. They're chrome S71s.
 

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I'm running 325/45/17's on 17x10.5 Racestars and even with my fenders rolled and my hubs shaved, I still rub. Downside to the stiffer spring is less weight transfer backwards when you launch
 

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If you can't find out the wheel specs any other way, you can dismount the tire and measure the width. Measure width and backspace
If you have the part numbers it includes the width and backspacing in the number.

Sedan fitment S71: part number 71HB7100N72A
Wheel Diameter:17 in.
Wheel Width (in):10.000 in.
Manufacturers Wheel Series:Weld Racing RTS Forged Series
Backspacing (in):7.200 in.
Offset:+44.00mm

Coupe fitment S71: part number 71HB7105N77A
Wheel Diameter:17 in.
Wheel Width (in):10.500 in.
Manufacturers Wheel Series:Weld Racing RTS Forged Series
Backspacing (in):7.700 in.
Offset:+50.00mm
 
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When I mocked up the same M/T's on my wagon I almost immediately knew I'd have the same issue, so I sold the Mickey's before I mounted them and picked up the M&H 275/50/17 (28" tall) tires. No rubbing issues whatsoever and hook has been excellent.

M and H Drag Radials
 
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