RT660 275 vs 295 Advise

[OXWhiteGT]

No, only the fronts. You would get 19x11 50mm offset which would fit the rear with no spacer. This now allows you to rotate the tires front to back, extending their life.

Oh nice! Ok, cool, so I would only need extended studs and spacers for the front. Good to know! This would also save some money so that I wouldnt have to get studs and spacers for all 4.


Yeah the square setup I want to do so I can rotate back and forth exactly what you're talking about

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[Bluemustang]

You don't really need 305s. 275 RT660 will be plenty fast. If you get more serious later on then go 305s. No need introducing more headaches and costs if you're just doing light track duty and street.

 

[OXWhiteGT]

So with what I've talked with you guys about in this tread (Which has been SUPER helpful by the way, you guys rock!). The cost breakdown is looking like this:

LMR SVE R350 Wheel kit (19x10)	$1,200​
Falken RT660 (275/35/19)	$1,513​
	$2,713​
Falken RT660 (305/30/19)	$1,679​
LMR SVE R350 Wheel kit (19x11) (x4)	$1,220​
OPMustang 14MM GT4 Mustang Type Racing Wheel Studs - Compare to M-1107-F	$250​
OPMustang 25mm spacers (Front)	$130​
	$3,279​

Looks like ~$566 difference if I go with 19x10 & 275 vs 19x11 & 305. Also, if I can get in on some black Friday deals, that will also help out some too!

After looking at it like this, this does seem to make more sense to just shell out the extra $$ and do 19x11.

 

[OXWhiteGT]

You don't really need 305s. 275 RT660 will be plenty fast. If you get more serious later on then go 305s. No need introducing more headaches and costs if you're just doing light track duty and street.

haha we'll now ya got me thinkin back to the 275s! :-)

 

[Bluemustang]

haha we'll now ya got me thinkin back to the 275s! :-)

Well, here's my logic. You don't really want those tires for the street. They'll hydroplane in the rain like a motherf. And not usable in the cold you'll ruin em. They are only good for the track or warm, dry summer weather. Depends where you live. But either way they will wear out fast on the street and you're wasting a lot of money. You really need two sets of wheels for street and track.

So if you go to extended studs for 305s, you're stuck with those studs sticking out in the front which will look weird when you go back to your street wheel and tire set.

I opted to not do the extended studs and run MRR M600 +24/+50 offset. So i was able to fit 11" wide and 305 RE71R. But, then I can't rotate the tires. Decisions decisions. They're amazing but I probably would've been fine with a 275 tire and rotatable setup and therefore also no need for extended wheel studs.

 

[OXWhiteGT]

Well, here's my logic. You don't really want those tires for the street. They'll hydroplane in the rain like a motherf. And not usable in the cold you'll ruin em. They are only good for the track or warm, dry summer weather. Depends where you live. But either way they will wear out fast on the street and you're wasting a lot of money. You really need two sets of wheels for street and track.

So if you go to extended studs for 305s, you're stuck with those studs sticking out in the front which will look weird when you go back to your street wheel and tire set.

I opted to not do the extended studs and run MRR M600 +24/+50 offset. So i was able to fit 11" wide and 305 RE71R. But, then I can't rotate the tires. Decisions decisions. They're amazing but I probably would've been fine with a 275 tire and rotatable setup and therefore also no need for extended wheel studs.

Yeah true. After track days I do switch back to just my street wheels and tires (Forgestar CF10 20s & Nitto tires), so was thinking the fronts may look odd if I move to extended studs much like you're talking about. I mayyy just go with 275 all around for this year then reassess...

 

[ShadesOfBloo]

...Essentially, If I'm going to go with the 19x10, I should do the 275 because "wider isn't always faster".

I'm gonna add a vote for 305s.

I remember thinking 275s were big on Supras and Eclipses in the '90s, and the heavier of those two was a 3500 lb car. 275s did well at autocross, on 3000 lb cars.
On a Mustang weighing over 3700 lbs, 275s sound good for street driving, not so much for laps.

I haven't weighed my Mustang, but it's probably somewhere around 3800 lbs, and then I sit in it. With myself and an instructor in the car, my front tires would be making 4200 lbs or so change direction, and larger tires take the stress better.

I can understand the temptation to get a less-expensive tire size for now, but in the long run it would bug me, thinking I've left something on the table. Then I'd be buying another set of wheels, and never get back what I spent on the first set.

Better to buy 11" rims and 305 treads in the first place.

 

[Egparson202]

OPMustang is my go-to source for studs and slip on spacers, consult with @Optimum Performance . I've done my extended studs myself and it was fine. Do it once, but then take benefit from it all the time. If you do up to 7 events a year, that's quite a lot, and it makes sense to spend money once to get the setup, that you will eventually end up doing anyways))) just skip the step of investing into wheels that you would end up replacing anyways.

Buy once, cry once. This is the right play.

 

[Bluemustang]

Buy once, cry once. This is the right play.

If you do that many events a year, then I agree

 

[OXWhiteGT]

If I went 19x11, It looks like the LMR SVE R350 wheels I'd like to get are +50mm offset. If I went 19x11 with 305/30/19 all around (Including spacers and extended studs), you guys think I'll still be good to go? Any fitment issues you think I'll run into?

If I go 19x11 I'm thinking these wheel studs and these spacers from your guys OPMustang recommendations.

 

[Dana Pants]

May be a stupid question, but since we're here I'll ask it haha. If I did go 19x11 with 305s, I would need to get extended studs on all 4 points right? Not just the front, I'm assuming all around right?

if you drive as the bald eagles intended, you will regularly break rear studs and end up with ARP studs in the back as well.

as for tire, the 660 is obsolete technology. Go for the re-71rs.

 

[tosha]

So if you go to extended studs for 305s, you're stuck with those studs sticking out in the front which will look weird when you go back to your street wheel and tire set.

TBH, that is not true. Here are the stock PP1 front 255 wheels over 25mm spacer with extended ARP studs and stock size Gorilla lug nuts with -2.7 camber. In my opinion, they fit much better than barebone stock in this setup. Even better, now I can also fit rear PP1 275 wheels up front also sitting flush, so technically I can do a square street setup by getting couple rear PP1 wheels for very cheap. I never remove spacers.

 

[tosha]

as for tire, the 660 is obsolete technology. Go for the re-71rs.

I would even recommend to start with endurance 200tw tires. OP would get a ton more track time from RS-4 or ExtremeContact Force, and I doubt he would reach their limit in a novice to intermediate group.

Any fitment issues you think I'll run into?

And here are Steeda 11 wheels with 52 or 53 offset, 305/30/19 tires and 25mm spacers up front. Hope it will give you a good idea.

 

[mavisky]

Yeah true. After track days I do switch back to just my street wheels and tires (Forgestar CF10 20s & Nitto tires), so was thinking the fronts may look odd if I move to extended studs much like you're talking about. I mayyy just go with 275 all around for this year then reassess...

extended studs on most front wheels look fine depending on the wheel. My Project6GR Sevens have super deep lug holes up front anyway.

Not the best photo, but you can just barely see the studs on the front more than the rears on my street wheels.

On the race wheels (19x11 square rotatable setup with 305's) you can't see them at all.

 

[Rodpwnz]

I had the same dilemma, and chose 19x10 because it works best for my individual needs. I am a light/casual track day driver and daily drive my car on the street 99% of the time. I wanted something easy to rotate, with less complexity(No spacers, camber plates, extended studs). I am on PS4S street tires and am driving a mostly stock vehicle. I drive these same tires all year round in California during rain, flooded highways, 100F summers, 40F mornings and track days. This setup works perfectly for my needs, but I do occasionally wish I went 305 to squeeze the most out of the setup for those once a quarter track days...

So, for dedicated track wheels/tires, I'd go 11 inch 305 square.

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