can these tires sizes

[MasterOFDrift]

225/45/17 front
245/45/17 rear

thanks

[SR20Fastback]

Pretty sure they wont fit stock rims... now if you have some 17x say 7 or 7.5, yes they will fit <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/thumbs-up.gif" border="0" valign="absmiddle" alt=':thumbsup:'>

[MasterOFDrift]

cool yea thinking about getting the 5Zigen Typhoons in gunmetal

[edit] added gunmetal

[uiuc240]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (MasterOFDrift @ Sep. 17 2002,12:13)</td></tr><tr><td id="QUOTE">cool yea thinking about getting the 5Zigen Typhoons in gunmetal

[edit] added gunmetal</td></tr></table><span id='postcolor'>
if you're going to get the 17x7.5's all around, you might as well just get the same size tires all around too. &nbsp;there's really no point in having big tires out back unless you have big power out back too...since it will just make you understeer like mad. &nbsp;i agree the "look" is really cool...but it just means that you can't rotate your tires at all, and you spend more money on the rear tires. &nbsp;i just don't see the advantage. &nbsp;but it's your car, do what you like.

Eric

[MasterOFDrift]

Thanks uiuc240 you have a very good point. I think I will get the same size tires all around. Thanks for the advice

[orange-grey]

From just a size standpoint, the 245/45/17 are way too tall. They'll effectively raise your gearing about 6% compared to the stock tires, which means 6% less torque at the wheels at any given RPM. Also your speedo will read 6% slow, so when it says 70 mph you'll actually be doing over 74. A 225/40 is more like what you want height wise.

As for the front, I have 17X7's with a 38mm offset and 215/45/17's, and I can't fit a pencil between the inner sidewall and the coilovers. You could get a wheel with less offset to fit bigger rubber, but overdo it and it can screw up where the steering axis crosses the contact patch and make the car wander all over the place.

And I agree with uiuc420, getting a staggered setup is a waste of money unless you have a SR. It does make the car understeer a tad more, and I hate not being able to rotate my tires when the rears start wearing on the inside. Plus you don't want a staggered setup with the same size wheels all around. The front sidewalls will be bowed in, which is fine, but the rears will be bowed out which makes the tire squirm around more and is bad for handling. I notice a lot of autocrossers and drifters use wider wheels and skinnier tires so the tire is sort of "streched" over the rim, which would seem to me to make handling much sharper and more responsive.

I say go with 215/40's for racing or 215/45's for street use, all the way around. And I'm not sure how 7.5" wheels are supposed to fit, I definately think they would hit the springs on my car, but I guess people are running around with them so maybe I'm wrong.

[LanceS13]

Hey o-g, what coilovers you got?
I run 7.5" +35 rims with 225 w/o any fitment issues.

[240 2NR]

Well a lot of autoxer's run bulged tires because they have to use stock sized rims to avoid changing classes, but the tire size is unlimited, so you end up with big tires on small wheels.

As for the understeer. &nbsp;The limits of your car will be significantly raised by going to 225 and 245 series tires. &nbsp;Don't expect understeer around every corner, expect it closer to the limits. &nbsp;In stock form the 240 really doesnt have the power to spin it's tires unless your steering isn't smooth, or you're taking a very tight turn. &nbsp;The gains from a 245 tie in back are porbably minimal. &nbsp;My 225 kuhmos are like glue in the back of my car.

As for tire shape, Bozz speed in japan has a car setup with the same size tires all around, but with staggered wheel sizes. &nbsp;Wider up front, narrower in the rear. &nbsp;The idea is the front tire will have a squarer shoulder for better turn in and the rear will be rounder for more progressive breakaway. &nbsp;The idea of a staggered tire size is more a carry over of muscle car days where they had much more power than handling to deal with, plus fitting a 300+ series on each side of the engine, plus leaving room for them to steer would be a huge task, probably requiring large fenders or a narrower engine. &nbsp;In a well balanced car, the same size all around is most likely the best setup, plus it will save you money since you can rotate your tires.

[orange-grey]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (LanceS13 @ Sep. 17 2002,1:20)</td></tr><tr><td id="QUOTE">Hey o-g, what coilovers you got?
I run 7.5" +35 rims with 225 w/o any fitment issues.</td></tr></table><span id='postcolor'>
I have Tein HA's with camber plates. &nbsp;I was thinking about this today and think the way I set the plates may be affecting my clearance. &nbsp;Instead of setting the plate at zero before aligning it to zero, I set it at max positive so I would get more adjustment in the negative direction. &nbsp;This would move the top of the assembly toward the tire once the knuckle was set to zero. &nbsp;I never really thought about it before. The 215's were still way too close to the stock spring perches for comfort, though, so I can't reccomend going wider/taller without seeing it for myself.

[orange-grey]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (240 2NR @ Sep. 17 2002,1:32)</td></tr><tr><td id="QUOTE">Well a lot of autoxer's run bulged tires because they have to use stock sized rims to avoid changing classes, but the tire size is unlimited, so you end up with big tires on small wheels.</td></tr></table><span id='postcolor'>
I don't think I said that clearly. &nbsp;I know many use fat tires and skinny wheels because of class rules, but if you look in the unlimited classes many choose to use tires a few sizes smaller than what they could actully fit in order to get the rounded sidewall like on the Bozz car, but in both front and rear. &nbsp;A lot of AE86 guys do this, and it looks like they're running lowrider tires on wide race wheels. This makes the whole car breakaway smoothly and predictably, like you said. &nbsp;I was trying to point out that it's not always the best idea to try to stuff the widest possible tire under the car unless you're running wide wheels to go with it. &nbsp;A good rule of thumb for tread width I've found is (RIM WIDTH + 1) X 25, so for a 7.5" wheel the ideal width would be 212.5, which you would round to a 215. &nbsp;For a 245, ideally he would want an 8.5" or 9.0" wheel, which I don't think he wants to do, so a 215 would be best for predictable handling.

[adey]

The way I work to figure out ideal size tire for a given wheel width is to start from 7.5" rim = 225mm wide tire. Move a step down to 7" rim = 215 tire, and 8"rim = 235 tire... similarly our 6" stock wheels have a 195 tire and a 9" rim would ideally have a 255mm tire.
i.e. for every 0.5" step, add or subtract 10mm from the tire width. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/thumbs-up.gif" border="0" valign="absmiddle" alt=':thumbsup:'>