Hello, new is300 owner here. I looking for some new wheels in the next few months. The front wheels after using the offset calculator is at 66.6 which is more than 65 which is 1.6 past the fender. The rear is at 74.2 which is more than 68. I’m planning to use 215/45R17 front and 245/40R17 rear. Any real world experiences with running this setup? Do I need a roll or can I get away with trimming? I’m not lowered yet, but planning to lower the car at least an inch on cxracing coilovers.
Does anyone have pics of the wheels similar to what I posted? I searched but seem to only find stanced IS300. I’m looking to run a somewhat conservative offset for my daily is300.
I wouldn't run a 245/40R17 on the back, especially with a 17x8 wheel - on a x8 it will look pretty pudgy.
A 225/45R17 and 245/40R17 are a better match if you want to increase your overall diameter. 235/40R17 is going to be the stock diameter of tire which will work well with your speedometer (since 215/45R17 is a stock size tire).
I run something similar to what you are trying to do. 17x8 up front & 17x9 out back Kosei KS-1s. +35 offset and a 245/40 tire on all four. Lowered on coils, fenders are rolled.
Has worked well for the most part even on track days /auto-X. I would prefer a squared setup next time.
Ah that makes more sense. The way it was stated, sounded like you wanted the square setup for the track. But it's just for looks. I can't tell the difference between the front and back anyway, they look the same to me. My winter wheels are squared, just the back is offset 15 more mm
i know you didnt ask me, but ill chime in. i specifically went square so i could have the same exact face type and look through out all 4 corners. it drives me nuts when i see aggressive faced concaved wheels in the rear and i can tell they're staggered because the front has a weaker face profile. dished stagger is fine for me as long as the front lip isnt like 2" and the rear is 5" (i see this a lot in newer euro cars).
i also planned to buy 2 battles that are +1mm higher offset (close enough) for spares eventually; since i have the same spec all around those battles can go on the front or rear without a problem and im already setup for that in all 4 corners. just makes life easier.
one other small plus is tire sizes. while its not hard to find different sizes, im cheap and am constantly looking for deals on the specific tire brand/size i like. my tires only last 5-6k miles on a side before they need to be flipped (no sense in buying pricey rubbers IMO, just need something that stretches good). it just makes it easier when i need 1 tire size versus 2.
yeah I totally agree with you on all your points. Only reason I'm staggered is because the body of the car requires it for an even look, unless using spacers. My winter wheels, since they are the same width, need 15+ more offset in the back, which gives more of that weird concavity difference, vs my staggered summers, which use width to fill in rather than offset. It makes things a little more annoying when it comes to tires and rotation, but nothing problematic. Then again, I'm not cheap lol, and I don't do stretched setups. So I just redo all the tires at once
I was curious how the 17x8 +35 fills the front out as well. I'm planning on a 17x8 in the front with either a +34 or +36 offset. I'll be mounting a 235/40/17 which I'm hoping will have a similar profile to my rear which is a 255/40/17.
i almost wish there was a thread just for telling us if a wheel will clear the spindle. it would even more awesome-r if it had an easy equation that anyone with half a brain could plug in and get their answer.
oh wait. we do have one. cant believe not one person has suggested that thread. /thread
i almost wish there was a thread just for telling us if a wheel will clear the spindle. it would even more awesome-r if it had an easy equation that anyone with half a brain could plug in and get their answer.
oh wait. we do have one. cant believe not one person has suggested that thread. /thread
I've used that in the past. it's great for running stock alignment specs. once you do anything close to a track alignment your front and rear fender #'s can be <80 [emoji23][emoji23][emoji23][emoji102][emoji102][emoji102] but that's using a diameter close to stock. 17s are still tricky if you want to go wider than 8.5 in the front because suspension clearance depends on barrel design. but for everyone else this is a good tool. thanks again [emoji1474]
i have like 6 to 8 degrees of negative camber all around, i wouldnt consider that a 'stock alignment'. it works fine. that equation im referencing isnt concerned about wheel diameter, its getting the correct offset and width to ensure your wheel setup will clear the spindle. it also gives you a good idea of where your wheels will be in relation to the fender.
i have 9.5 wides in the front, so im not sure why you think its 'harder' to fit wheels wider than 8.5 in the front. you can quickly plug numbers in via the formula and see if it will clear or not. i used that formula many times over many potential setups, with a fair amount of research and a lot of google fu. its not going to tell you the meaning of life, but it will give you basic rudimentary data to further inform you. the rest is up to you with trial and error.
example 215/45 federal rs-rr on 17x8 +26 lowered 2" -3.3 front camber
8 * 25.4 / 2 - 26 = 75.6 which is >65 but it's okay inside suspension clearance is no issue
let's take a look at the rear
8 * 25.4 / 2 - 26 = 75.6 which is still >68 yet no issues rear has -2.6 camber
so it's a good guideline but not the end all be all...
my main concern is staying 17's while going 9 wide and clearing the suspension while having a square offset with hopefully a 255/40 tire [emoji16] or a tread width of no more than 8.8inches
good point. although my main point still stands: it is not any 'harder' to fit a 17 than it is an 18 inch wheel when talking about inner barrel clearance. its a 1/2 inch difference. if you look at an unmolested spindle, the general inner barrel clearance in that area of the spindle is the same over a half inch area (or very very close). things like wheel width, offset and tire size are much more critical when talking in this context over 17/18 diameter clearance.
edit:
further building on your short spindle comment. you could argue that fitting 17s would actually 'easier' when discussing the upper balljoint clearance. which would allow you to run an even shorter spindle, or a slightly bigger tire size.
i would have loved to have had my spindles shortened 35 or 40mm, but i couldnt because i specifically had 18s (so i had to 'settle' for 30mm). i could have possibly gotten away with 35mm, but it would have been insanely close and i would have been married to a certain tire size until i change wheels.
5mm clearance to inner spindle and 5mm clearance to supra caliper. any closer and I wouldn't be comfortable tracking it.
I had similar fitment with 17x9 +38 but those were forged monoblock wheels and at the time I had stock calipers. the test fit is a low pressure cast with flow forming (forged barrel) if it were a full low pressure or gravity cast wheel it may be closer to the inner spindle
regarding outter fender clearance, I would either have to 1) run more camber than -3.3 but no more than -3.6 2) raise the car 15mm 3) raise spring rates 4) run something closer to a tread width of 8.4" vs the idea 8.6 - 8.8" but a diameter under 25"
since I want as much contact patch as possible I'll be raising it 15mm and going from 16k/9k to 18k/12k. depending on tire manufacturer, tread width of 8.6-8.8" can vary from 235/40, 245/40 or 255/40 just need to research the specs.
if anyone is interested, tire rack is closing out on their 6/32 tread depth stock of a052
Bumping this one since it's specific to 17x8/9 fitment.
I'm looking to do 17x8+ 35 F and 17x9 +35 R. I'm on stock calipers and plan to leave it that way. I'm also getting coilovers and fenders rolled.
My question is what tire sizes should I go with? I don't plan to slam the car by any means and 95% of the time there won't be anyone riding in the back. I was thinking 225/45/17 up front and 245/40/17 rear. Would be interesting in hearing some feedback from someone that has run something similar.
Bumping this one since it's specific to 17x8/9 fitment.
I'm looking to do 17x8+ 35 F and 17x9 +35 R. I'm on stock calipers and plan to leave it that way. I'm also getting coilovers and fenders rolled.
My question is what tire sizes should I go with? I don't plan to slam the car by any means and 95% of the time there won't be anyone riding in the back. I was thinking 225/45/17 up front and 245/40/17 rear. Would be interesting in hearing some feedback from someone that has run something similar.
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