E55 RUSS

I put 285/30 tyres instead of 275/30 tyres...

I wonder how would bigger tyres affect my 1/4 times ???

I mean with wider tyre I should be able to launch better but bigger diameter can have negative effect as well...

Anyone tried diff set ups and what was your results ???

jangy

Bigger diameter rim will hurt. Even ones that are lighter than the OEM ones. Seen it first hand on Jay55s ride.
Bigger diameter tire will definitely hurt, since you have bumped up the gearing.

Wider tire will help with launch and hurt once going (excess drag).

Life in an E55 is all about that compromise between the launch and full out.

dsc

If you use a bigger diameter wheel but lower profile tire to end with the same overall diameter combination that was OEM, why would you experience any gearing change. Isn't overall diameter the most important thing?

stevebez

275/30's on 19s are close as dammit to 265/35's on 18's in rolling circ.

jason427

Why don't you get a set of matching 18" rims w/Drag Radials on it.
Tadaaaa... no more traction problems, or wasting Coca-Cola

EvilllEmpirE

overall diameter is more important. You can theoretically go to a bigger and wider tire.....but if you choose our side profile accordingly, you can be close to the same overall diameter as OEM, or even lower.....which would help times. Lower overall diameter will offset the larger size tires.

newton22

And to bring in another factor into this discussion, more sidewall + lower PSI = more traction.

E55 RUSS

So now I can expect worst 1/4 times then I had with 275/30 or I have more tyres more side wall and this will help ME off the line and wont hurt much once I going...

For 19 inch wheels

285/30 diameter is 25.8 section width 11.4

275/30 diameter is 25.6 section width 10.8


0.2 inch in diameter wont make much diff imho....but 0.6 width in tyre should


Where as 18 265/35 tyres diameter 25.3-25.4 and section width 10.6


Too bad we dont have RE01R availible here and Adavn Neova doesnt come in 19...

If I were to get slicks for this car now, then I would only get 16 wheels with Mickey Thomson slicks or other brand which starts with H and only porduces slicks...

Hope some tyresmakers will introduce 275-285 slicks or semi-slick for 19 wheels in the future...

ChicagoX

Good comment.

Sidewall flex (or lack of it) can greatly affect traction.

FWIW, a 285/30 will have a slightly taller sidewall than a 275/30.

enzom

Are you having a traction problem? If your 60 foot times are already in the 1.7's, then a wider tire isn't going to give you much improvement. In fact, and as noted already, if you wind up with a smaller sidewall that is less flexible, you will probably lose traction.

juicee63

You could improve your car alot in the 1/4 mile simply by going 18" on all 4 corners. While your rims are nice the 19" wheel kills you. Get 18" rims with a set of NITTO's or BFG. Pilot sport cups are also a great tire. You could simply put the 18" on when you race. You will lose perhaps 15 -20 lbs and the car will roll better

E55 RUSS

I doubt that there would much of difference in 1/4 18 265/35 vs 275/30 or 285/30 but I think you can launch better with 285s

JAYCL600

street radial tires do not flex, its not like a slick that allows sidewall crinkle. IMHO it doesnt really matter if u had 345's back there you wont get any more traction then if u had a 245 out back. FYI my drag radials are only 265's, my car weighs over 4500lbs with about 700TQ at the wheels and on a properly prepped track i dont spin one bit on a full boost launch.

E55 RUSS

Are joking ...How can you not get more traction with with wider tyres

JAYCL600

no iam not joking, when it somes to regular street radials on a car with as much TQ as yours puts down it doesnt matter.

E55 RUSS

Are you sure...so you say 265 tyres on e55 will work as good as 285 ???

JAYCL600

relative to traction and your specific vehicle, thats exactly what im saying, unless u go to a different tread compound tire they are all gonna go up in smoke no matter what width tire u run.

E55 RUSS

I have to disagree with you...I feel that with 285 tyres I get more traction and less ESP interaction...

JAYCL600

sound like you got a winner then with the 285

E55 RUSS

No man...I just dont understand how can narrover tyres provide same grip as wider ones...If it would be like this then manufactures wouldnt bother to put FAT tyres on the back on Powerfull car like ours or others like Z06, Ferraris or Porsches...

Rudyrono

Think about it. The difference between a 265 and a 285 is only 2cm. That's not that much more contact on the pavement, especially given the amount of torque the E55 puts down. The biggest improvement in contact patch comes from tread pattern. That's why the DR will hook up better than a regular tire because of the tread pattern. As mentioned above, compound also has a more dramatic effect than size. BFG's historically hook up better than Nittos because they are made with a softer compound...of course, you'll be buying new ones a lot more often. If you're serious about launching, get a set of spare rims and put some M/T ET streets on. You'll hook up.

E55 RUSS

Yes teoretically you are right and you cant compare regular tyres with slicks or semi-slick..but wider tyres even 2cm still provide more traction I think

I am confused NOW...