[flamesoldier]

I just upgraded to a hellcat from a scat pack and the rear tires def arnt too safe for a rip and need to make that change. Should i change all 4 tires to the larger 305/35/20’s or just the rears. So the question more or less is are guys just changing there rear and keeping stocks up front?

 

[Himmelkat]

Just the rears are the main problem, but put new Michelin PS4s on the front, too at 275mm wide. For long life and good traction in all weather, Micheling PS4S are the item, plus their over-186mph speed rating.

If you rarely see cold weather, the Mickey Thompsons are very grippy, I never squeaked them on hard braking. They only have a speed rating to 168mph, but I took them up to 180mph once without incident. Their traction is great, and this was just a stock 275-width.

People also like some of the offerings from Nitto for the grippy summer tires, and other brands. Do not get Nitto Motivos, (all season) as their rubber compound seems to go off and become less grippy, I can report from personal experience.

 

[flamesoldier]

I live in florida lol so cold isnt a thing but that answers what i was thinking. Thanks so much

 

[Challey Cat]

I'm assuming you have a standard body Hellcat in which case you could not put 305's on the front but if you have a wide body Hellcat you can put the same size tire on each corner

 

[HellcatHellYeah]

As it's RWD is there any advantage to putting 305's on the front instead of the 275's?

 

[Mattm400]

As it's RWD is there any advantage to putting 305's on the front instead of the 275's?

The advantage is, if you keep the same size on all 4 corners you can prolong the tire life by rotating them.

 

[HellcatHellYeah]

That makes sense, I was thinking for performance or traction though.

 

[Himmelkat]

Cornering traction and braking, certainly, but even RWD race cars with front-mid engines do not use same-size front and rear tires, and they can use anything they want.

 

[Xylander]

I'd say practice driving it more before you slap tires on it. That's because once the factory new tire sticky wears off, you'll be doing the same thing if you think the car isn't safe with 275s. I've got no problem running sub 4 second 0-60s on 275 Michelin all seasons. If you're not experienced with cars that run 650+ torque, then train your right foot. You'll thank me later. It doesn't matter if you're running 275s or 315s on the rear. If your right foot slaps the ground when you give it gas, it'll blow the tires off pretty much anything (to include M/T 18" drag slicks).

 

[flamesoldier]

I get it but i just seems even half throttle pulls get car sliding a bit

 

[Xylander]

Yep, it's called torque steer and is completely normal. These cars are big, with big engines, transmissions, long driveshafts and high torque. All that rotational mass will cause the car to kick the rear around to the right a little. Normally, 10-15 degrees or so. If you keep your foot in it, the car will settle and glide out straight on its own. Where people go wrong is they try and steer out of it. If you just hold the wheel straight, the rear will slip a little and right itself as you move forward (so long as you're in a controlled situation... this will not work if you've broken out). If someone tries to turn during torque steer, they'll just end up turning hard right straight into a ditch, wall, or whatever.

This is one of those big power car things you have to get used to. It isn't unsafe... it's just a symptom of the caliber of car you're driving. Its drivetrain is just so strong that its rotational mass and torque is enough to want to push the rear around in anything but 100% traction. If you watch enough film of Hellcats launching, most of them are going to leave a little crooked as the wheels float a little and the rear walks around counter clockwise a bit. If it doesn't, you probably launched too conservatively Unless of course you're on drag slicks on a prepped track... then scoot scoot is the flavor of the day.

 

[flamesoldier]

Right I understand that lol 😂 I have been driving muscle cars classic and new technology, but this one is a monster and im not trying to wrap it around a pole so just trying to get the best possible grip for a daily driven tire whether its a Pilot 4 Sport or Continental extreme contact.

 

[Xylander]

Right I understand that lol 😂 I have been driving muscle cars classic and new technology, but this one is a monster and im not trying to wrap it around a pole so just trying to get the best possible grip for a daily driven tire whether its a Pilot 4 Sport or Continental extreme contact.

The PS4S will last you 8-10k miles. Fantastic tire. The PS All Season 4 is what I use currently. Also a fantastic tire but is warrantied on our cars to last 40k miles. The all season PS4 is rated higher in traction than the summer Pirrelli. I'm in Florida as well and if anything, the wet handling on this tire is fantastic. They're so good, I'm likely going to put a set on my new Redeye in a few months and turn those brand new Pirrellis into tire swings like I did with the ones that came on this car.

 

[Rockster]

Right I understand that lol 😂 I have been driving muscle cars classic and new technology, but this one is a monster and im not trying to wrap it around a pole so just trying to get the best possible grip for a daily driven tire whether its a Pilot 4 Sport or Continental extreme contact.

No matter what tire you fit they'll spin if you romp on the gas pedal.

Car only does what you tell it to do via the steering wheel, brake pedal, and throttle. Reads like you need to calibrate your right foot to deal with the HP.

Drove my Hellcat and while it could spin the tires with ease I avoided this by just being a bit lighter on the gas pedal.

 

[Himmelkat]

Yep, it's called torque steer and is completely normal.

Wrong.
"Torque steer" is most often when two sides of the car have substantially unequal polar moment in their driven wheels, so one wheel is accelerating the car more, while the car with the greater polar moment in its axle shaft (usually the longer one) is pulling less, so the car tries to move forward more with the side with lower polar moment in its driven wheel assembly.

What Is Torque Steer? | Torque Steer Explained | CJ Pony Parts

Torque steer is common in performance FWD cars. Learn why it happens and some ways to reduce it.

www.cjponyparts.com

And it is completely abnormal in Hellcats with good tires. Half throttle? Yup, sounds like the Pirellis.

Even the front-wheel-drive Neon ACR did not have torque steer, at least not that I noticed, due to Dodge going to the trouble to balance the polar moment of the front driveshafts, evidently. I used to do a two-wheel burnout in it, with an open differential.

If you are using the stock PIrellis, donate them to Winnie Mandela so she can O-ring some more of her political opponents or something (caught on video) but do not use them on a car meant to not crash and kill others.

Get some Michelin PS4S's if you are in a region that drops below 50. Get some stickier tires (do a search on this forum for the exact tires) if you do not live where it drops below 50.

But, whatever you do, get rid of the Pirellis.