tire and wheel questions....again

[macrossranma]

can i mount 225/50/15 on a 6" rims?
and is theres a big different in performance for solo2 between
225/50/15 & 205/50/15 r compound tires?
My coilovers are pretty stiff 350f/500r and the shocks can be set as pretty stiff, and i hve around 1.5 finger gap all around front and rear, is my car too low for solo2?or i should use smaller tires or 225/50/15 is ok without rubbing fender?

actually what is and ideal setup for my car 2001 civic if i have stiff enough suspension with about 1.5 finger gap all around

offset ?
rim width?
tire size? (also which kumho tires is good for solo2?
estca v700 v710 or vitoracer v700)?


thanks!!!

[macrossranma]

no one?

thanks!

[miataboi]

2-finger gap is preferred.
It's a fact.

[gatherer]

the gap I run is 4 fingers and bit high.....

[roooo]

225 sounds quite wide to stuff on a 6" rim. You'll always be running it at higher than normal pressures to help it keep shape. so 205 is probably better.

[macrossranma]

how about 225 on 6.5" rims, is it ok?

thanks

[roooo]

It really depends on your point of view, and whether you really think that extra 2 cm of width is worth compromising the life of the tire. Lots of people in SCCA events put 225s on rims as skinny as 5.5" probably .. whatever came stock on their car.

You may be a little bit faster width wider tires .. but not necessarily. SCCA competitors even stagger their widths .. 225 up front, 205 out back on a FF car.

Personally, I would save a bit and get a tire that is better suited to the width of rim availble unless you're really trying to get that little bit extra out of your car.

For a second opinion, you can check the SCCA forums :)

[macrossranma]

thanks

[Nissan Racer]

I ran a 225/50/15 on a 15x6.5 rim last year. I wasn't overly impressed, there is a lot of sidewall flex...and besides, you're looking at an average of 4.5 lbs per tire difference vs. a 205/50/15...thats a fair bit of unsprung weight.

[njansenv]

Some of the Neon guys swear by 225's on the factory 14x6 alloys, with 205's in the rear: on the stock ACR suspension, it's a pretty quick setup in the stock classes. As noted, the sidewalls have to be pretty darn stiff, apparently the RA-1's are a little too soft for a rim that narrow;).

Nate

[macrossranma]

i guess i'll be using 205/50/15 than, so is 6.5" rims perfect to mount 205/50/15?

thanks!

[DareBee]

The 205 is going to heat up quicker and improve performanace for the first 10 - 15 seconds of your run.
I have gone to bigger tires and notice a loss of performance at the beginning. I just keep telling myself that I am making the time up once warm.

[Greg F]

Originally posted by DareBee
The 205 is going to heat up quicker and improve performanace for the first 10 - 15 seconds of your run.
I have gone to bigger tires and notice a loss of performance at the beginning. I just keep telling myself that I am making the time up once warm.

Oh, so that's what all the sliding around is for!:p

[macrossranma]

thanks again!

[Greg F]

OK, on a more serious note, I may have experience with the exact combinations you are considering, macrossranma.

I'm not sure, but I think my rim width on the RX-7 is 6" or maybe less. I did use 225/50R15 last year and they were VERY difficult to setup, pressure wise. The setup was excessively different from lot-to-lot, and worked only over a very narrow band as well.

Too low pressure and the tires would roll too much, causing vague handling and killing the tire.

Too high pressure and the tires would lose traction easily because of the concentration of load within the contact patches (as the tires balloon in the centre.)

I can only imagine that with a nose-heavy car like you have, the situation will be much worse. (On my Talon, 60-40 wt. distr., my rim size was also too small--though not as much--yet it was not as bad as on the 50-50 RX-7.)

Search the boards for previous posts on this topic. I'm quite sure Hanif et. al. have answered all such questions very recently.

Check also the tire manufacturer's website for the correct rim size, and use at least the proving rim size.

Edit: OK so the Kumho site doesn't give a range for each size, so try this as a guideline, Falken Azenis sizes. (http://www.falkentire.com/tires/az_rs_sizes.htm)

[macrossranma]

thanks!!

[max attack]

The victoracer would likely be the best choice as the ecsta has proven to be a hit and miss deal depending on the vehicle weight amoung other factors.The new 710's are an unknown but by their description sound to be a high wear tire-have to wait for grm's next tire test(soon I hope).
The tire rack site lists the suggested range for all the competition tires,I would stick with no more than the 205 on a 6" wheel.Most of the gain in tire section width is lost when cramming a wide tire onto a narrowish wheel.
As already noted the wider tire is heavier and if used on the narrow rim the extra weight isn't being offset by the extra grip as it likely doesn't have any more grip than a 205 on the same wheel.

[macrossranma]

i see, so i guess im going with 205/50/15 on a 6.5" rims, thanks all!!