Will this higher compression hemi require premium? Also, the tire sizes are just one different front to back. Can anyone confirm the wheels will be the same front and back? thnx!

 

Good Question! If the off-set is the same would you be able to put 255-45-20's all around??? That would be nice3 when it comes time for rotation!

 

the wheels are very likely the same front and back, though i'm pretty sure you wouldn't be able to go and put 255-45's all around as it will cause all sorts of issues with the traction control and ESP systems on the car.

 

shiltz, thnx but you are guessing. The reason I ask about the wheels has nothing to do with rotation which is something I refuse to ever do. Even the tire companies are moving away from recommended rotating tires. I asked because I have some 275/45 x 20's and would put them on the back, using the front wheels and then the rear wheels and tires would go to the front. When you have rear wheel drive, the front tires round out because the corners resist the turning and disappear eventually. Rear tires do best with a flat/squared off bottom and if you rotate, you put rounded front tires on the rear, decreasing their traction ability and the squared off rears on the front only to resist turning until they are rounded off. The ONLY advantage to rotating tires is it allows replacement of all four at the same time. I see zero advantage to this, especially if you are adding time/visits to do the rotating. I like to put larger tires on the rear and then when the front tires wear out, the original rear tires go up front. Now..........who knows about the required type of fuel for the 6.1?

 

you would think someone who is a "member of DCX corporate management" would be able to acquire info as simple as what size rims and tires, and required fuel type, are on a new vehicle....i think we have someone here who is...if i can remember who it was i will have them Pm you...

and who told you that tire rotation is pointless?
and putting fat rear tires on a FWD car is silly....

 

acording to alpar.com the 6.1 hemi takes 91 octane http://www.allpar.com/cars/lx/srt8-chrysler.html, as for the rims yes it's a guess, an educated guess, however that's all you are going to get seeing as the car doesn't exist aside from the few pre-production concepts dodge made for shows and testing, we know the car will have 20X9 rims front and back so it's safe to assume they will use the same offset as it would be foolish to design it to need two different rims given they are both the same size. for putting 255-45's all around it is a fact that it will cause issues with the traction control system as the way the system works is by comparing the rotation speed of the front and rear wheels in relevance with each other so you need to keep the same ratio between the two for it to work right, it's the same case with the non SRT magnums, you can't put larger OD wheels on the back without doing the fronts as well.

 

Thnx! The 91 octane answer is what I was looking for. The higher compression had me guess it would require some octane. I never cared about any offset "issue" because, like you, I figured the front and rear wheels will be the same if the size of the tires is only different by one size. Although you give the correct info about traction control (and ABS) requiring stock diameter tires, my experience says it really does not matter for me and I change the diameters often and a lot. I am considering a Magnum SRT-8 and will probably get one as soon as the initial stupid prices drop somewhat. That is why I also ask elsewhere if anyone has gotten a price on these. I would guess the Magnum SRT-8's would stand a better chance than the 300's to be sold at "reasonable" prices because of the high demand for the Chryslers. I have 275/45 x 20's from another vehicle and can picture them fitting just fine on the back of the SRT. That way, I could just burn up the four of them that are just currently sitting in my garage and use the stock rear tires on the front after the fronts wear out. thnx again for the octane answer!