New Tires?

Im looking between the Nitto 420S and Nitto NT05 Tires....Difference...The 420S come in 285s and are a little wider...the NT05s come in 275s but look waaaay better IMO...im kind of stuck on what to do....or if anyone else has any other suggestions of tires...i wanted to go 305 but i cant find any thatll fit a 9" rim so maybe 295? Help me out here...Thanks!!

I am sure jontoad will chime in to help you out...

Here's my 2 cents....

I got new tires a month ago and stayed with 20" rims so I didn't lose
any side wall and have a harder ride. I got Pirelli Pzero from Tirerack.
245/45/20 ($209) in the front and 275/45/20 ($208) in the rear.
All the other sizes were $300-400 each! They ride nice and quiet
and if it's warm enough out, I can't bust them loose even if I try!!!

oops, I meant 275/40/20 in the rear.... that makes them the same
rolling diameter so they're popular for AWD cars. Since they
sell so many of that size combo, they sell them for less!

i gotta guy 200 bucks each nitto nt-05 ,i will be placing my order soon too

I'd go with Invo's in 285/30/20 rear. You may not enjoy the rough ride on the NT05 tires. Plus they won't last long. Invo's are the best of all worlds. That's what I run and I love em.

what do you plan to do with the car? the 420 and NT05 are two completly different tires. the 420 is a 3 season touring performance tire and the invo is a purpose build weekend road racer tire for the street. the 420 has a soft sidewall and the NT05 is still as hell for cornering grip that makes your car ride on rails. the NT05 only comes with 7/32 of tread to reduce squirm in corners where the 420 is a full depth 10/32 or so tire with a 420 tread wear ratting vs the NT05's 200 tread wear.

i run 315/35/20 NT05's on 10 inch wide vipers in back and 275/40/20 NT05's on a 9 inch wide rim in front.

for what i do its the only tire option. no other tire in its price range is a 200 tread wear road race tire.

if you need a little more tread life, yea you might want to look to the invo's or something else. i get a little over an autocross season on a set. thats with about 6000 street driving miles thrown in before they are retired to track use only for a couple more events and after that they are tost.

295/40 is the widest you can go on the stock rim

that price on the pirelli tires is not bad. hell of a deal for that tire. the 275/45/20 is a little too tall in my opinion. some people run that but i wont. i don't want to take the hit on gear ratio and have the back end of the car any higher.

Jon what does it do to the gear ratio and is there anyway i can fix it...

ive put alot of miles on my nt-o5 already the front should last me two seasons the back are in need of replacing i dont burnout with them but i do drive daily to work...which is a hike

irishrt5.7 wrote:

Jon what does it do to the gear ratio and is there anyway i can fix it...

bigger tires lowers your gear ratio. its the reason people use short ass mustang tires at the track to effectivley raise their gear ratio.

275/40/17 mustang slicks make you have about an effective gear ratio of 3.23 on an srt8 3.06 rear end.

taller tires do the oppisite. they will make your car a sluch off the line but you will cover more ground on the top end. the taller tires roll over more in corners too.

for most people its not a big deal to go to that 275/45/20 but

you going from a 245/45/20 tire stock to a 275/45/20 tire changed you from the stock r/t gear ratio of a 2.65 gear rato to a effective 2.56 (aka the same thing as keeping the same size tire and changing your gear ratio to 2.56 is what your car feels like.)

Sorry, I messed up the rear, it's actually 275/40/20 NOT 275/45/20.
so the ratio will be the same as the front 245/45/20 right?

Sidewall Calculations:
245x.45=110.25mm
255x.45=114.75mm
275x.40=110mm

djinicide wrote:

Sorry, I messed up the rear, it's actually 275/40/20 NOT 275/45/20.
so the ratio will be the same as the front 245/45/20 right?

Sidewall Calculations:
245x.45=110.25mm
255x.45=114.75mm
275x.40=110mm

yea your good. 275/40/20 is perfect.

those are some nice tires too. i have no idea why they are that low on that site. must be discontinuing them soon or trying to get rid of some stock.

irishrt5.7 wrote:

Jon what does it do to the gear ratio and is there anyway i can fix it...

what size tire are you running in back? i thought you had 245/45/20 or something... thats not that much taller if so. 275/45/20 is quite a bit taller though.

275 40 20 rear 275 45 20 front I'm not totally sur if the fronts are 275 .but the rest of numbers are rifht

Well the stock tires suck no doubt...but i would like a nice tire for everyday driving and for if i go to the track here and there..i dont drive it in the winter and rarely in the rain.....

DamnSTR8 wrote:

Well the stock tires suck no doubt...but i would like a nice tire for everyday driving and for if i go to the track here and there..i dont drive it in the winter and rarely in the rain.....

sounds like you want invo's

jontoad wrote:

DamnSTR8 wrote:

Well the stock tires suck no doubt...but i would like a nice tire for everyday driving and for if i go to the track here and there..i dont drive it in the winter and rarely in the rain.....

sounds like you want invo's

ive been basing my tires off of looks instead of specs and if you say invos are for me then ill get em...cause i drive it here and there and i plan on doing a cam and heads soon..so iw ant soemthing that can hold up at the track

DamnSTR8 wrote:

jontoad wrote:

DamnSTR8 wrote:

Well the stock tires suck no doubt...but i would like a nice tire for everyday driving and for if i go to the track here and there..i dont drive it in the winter and rarely in the rain.....

sounds like you want invo's

ive been basing my tires off of looks instead of specs and if you say invos are for me then ill get em...cause i drive it here and there and i plan on doing a cam and heads soon..so iw ant soemthing that can hold up at the track

the 420's would be too pedestrian for you and the stiff sidewalls on the NT05's are not designed for the drag strip. tom likes the invos and he is putting over 500 rwhp into them with his vortech.

I am running 245 45 20 front 275 45 20 rear...but you know me i love the raked look...

What about Toyo Proxes R888's?

DamnSTR8 wrote:

What about Toyo Proxes R888's?

those are even more of a track tire than what i run... but they suck at about half tread and the only sizes in a 20inch they make are the ones made for GTR's that are 400 dollars a tire...

you should check size charts to see if they make a tire in your size...