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Larger tire with swift springs fit/rub?


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#1 UnCitizen

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Posted 11 June 2021 - 09:33 AM

Anyone have input on whether 285/35/20 and 295/35/20 combo on stock rims will rub with 1" lower swift springs?

 

Thanks

Nick



#2 droptopp

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Posted 11 June 2021 - 06:31 PM

Nope no issues, but why bother with the 295 and just run the squares and rotate them ? Doubt you will see any benefit to run a 295 for traction.
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#3 UnCitizen

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Posted 12 June 2021 - 10:17 AM

Yeah I guess I haven't thought about that. New to the platform, and just seeing people suggest those sizes. Any downsides to running a square setup? I assume no...

#4 UnCitizen

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Posted 13 June 2021 - 04:36 PM

Any downsides to running 285/35/20 on the stock wheels squared? Fronts will look/fit ok? I've looked through threads but find differing answers lol. Looking at Sport Cup2s

#5 droptopp

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Posted 13 June 2021 - 09:36 PM

No zero downside other than you can get a wider tire and rim on the rear.
Cicio Performance billet Crank 4.1 w/ CP billet pistons, Zenith R turbos, Cicio wet sump oling upgrade, flex fuel, ETS mid, down pipe, race FMIC, STM titanium axle back, ID2000s, Shep One K with drop gears, DS Axles, Volk Saga 18 10/12 (MT ET Streets), Advan GT Premium 20 R888. 1450+ hp / 1210+ tq

Old setups : more AMS motors than anyone I know - Alpha 9 w/ AMS 3.8, GTX3582R Gen II w/ AMS 4.1 billet crank, GTX3582R Gen II w/ AMS 4.0 big bore billet crank and of course FBO E85.

#6 hunter

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Posted 14 June 2021 - 05:50 PM

I run sport Cup2s on stock rims.....with lower springs, here is a new size to consider. It is 5/8 smaller or lower  that 295/35 in size but with lower springs, it will be just right.

I run   265/35/20 front and 305/30/20 rear.............. this size is a perfect fit to exactly equal front to rear and looks perfect to my eyes. Only down is your car will now be 1 5/8 lower to the ground.

I have no drive way to hit so it works for me.


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#7 AutoXGTR

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Posted 14 June 2021 - 09:17 PM

Anyone have input on whether 285/35/20 and 295/35/20 combo on stock rims will rub with 1" lower swift springs?

 

Thanks

Nick

This combo will fit but clearance will be close depending on if you run less front negative camber or any wheel spacers in front, not so tight in the rear even with 20mm wheel spacer. I have this for street driving and run no front wheel spacer.

 

You don't gain that much running 295/35-20 on the OEM rear wheel but it is a little more tire and a little wider look. Personally if I can use 285/35-20 square that just makes shopping for various tires that much easier.

 

Running square tire sizes (like 285/35-20) on OEM front and rear wheels fits rims 9.5-11" wide and perfect for 10" wide rim. OEM is front 9.5" and rear 10.5" which means the fitment is OK but not quite optimal for either wheel width. It isn't a huge deal not to have perfect fitment but the tire itself is being stretched or pinched just a bit, not a big deal for street use.

 

For these on OEM rims with 1" lower suspension:

265/35-20 fits rims 9-10.5" wide, perfect for 9.5" wide rim, tire diam. 27.3"

305/30-20 fits rims 10.5-11.5" wide, perfect for 11" wide rim, tire diam. 27.2"

They will work

 

I have also used 295/30-20 square on OEM wheels and 1" lowered suspension.

Fits rims 10-11" wide, perfect for 10.5" wide rim, tire diam. 27" (which is low), pinched fitment for front wheel and can be difficult to mount so need a good mechanic.

 

Other advantage of square setup is that you look at tire wear and monitor front tire inner treadwear, then as it is showing about 35% wear you can flip tires to the rear opposite side to get better tire wear. I find that rear tires will wear more evenly and slightly worn outer treads from the flip aren't bad for tire life (street use and limited track).

These are fine with reduced ground clearance so more risk for front lower lip scraping. With OEM suspension then larger wheel gap. 

Tire sizes are more aggressive so sometimes prices will be higher.

 

Note that if you aren't already lowered you need to consider ground clearance depending on your local road conditions and where you drive with steep ramps or multi-level parking structures. You don't want to run over anything solid under the car on the highway or be driving in poorly lit areas that are sloped. If you have a lower front splitter or aftermarket lower lip you should be careful to have ground clearance.


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#8 UnCitizen

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Posted 15 June 2021 - 06:06 AM

This combo will fit but clearance will be close depending on if you run less front negative camber or any wheel spacers in front, not so tight in the rear even with 20mm wheel spacer. I have this for street driving and run no front wheel spacer.

 

You don't gain that much running 295/35-20 on the OEM rear wheel but it is a little more tire and a little wider look. Personally if I can use 285/35-20 square that just makes shopping for various tires that much easier.

 

Running square tire sizes (like 285/35-20) on OEM front and rear wheels fits rims 9.5-11" wide and perfect for 10" wide rim. OEM is front 9.5" and rear 10.5" which means the fitment is OK but not quite optimal for either wheel width. It isn't a huge deal not to have perfect fitment but the tire itself is being stretched or pinched just a bit, not a big deal for street use.

 

For these on OEM rims with 1" lower suspension:

265/35-20 fits rims 9-10.5" wide, perfect for 9.5" wide rim, tire diam. 27.3"

305/30-20 fits rims 10.5-11.5" wide, perfect for 11" wide rim, tire diam. 27.2"

They will work

 

I have also used 295/30-20 square on OEM wheels and 1" lowered suspension.

Fits rims 10-11" wide, perfect for 10.5" wide rim, tire diam. 27" (which is low), pinched fitment for front wheel and can be difficult to mount so need a good mechanic.

 

Other advantage of square setup is that you look at tire wear and monitor front tire inner treadwear, then as it is showing about 35% wear you can flip tires to the rear opposite side to get better tire wear. I find that rear tires will wear more evenly and slightly worn outer treads from the flip aren't bad for tire life (street use and limited track).

These are fine with reduced ground clearance so more risk for front lower lip scraping. With OEM suspension then larger wheel gap. 

Tire sizes are more aggressive so sometimes prices will be higher.

 

Note that if you aren't already lowered you need to consider ground clearance depending on your local road conditions and where you drive with steep ramps or multi-level parking structures. You don't want to run over anything solid under the car on the highway or be driving in poorly lit areas that are sloped. If you have a lower front splitter or aftermarket lower lip you should be careful to have ground clearance.

Wow thanks for the detailed info. I still have some tread life left and this will give me stuff to think about.

 

Nick




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