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Old 04-14-2007, 08:23 AM   #19
Black Yaris
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Now where are the pix? huh?
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Old 04-14-2007, 08:30 AM   #20
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It will be a little while, wheels and tires are coming seperately and then I'll have to get them mounted and balanced. I doubt I will even have the wheels by next weekend as they aren't even shipping out until next week. I'm so tired of waiting for stuff. I promise I'll post some pics. My photographer is "on call" for a Yaris photo shoot.


not sure how accurate this really is but anyway might make a nice addition to this thread....


http://www.wheelweights.net/
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Old 04-16-2007, 12:38 AM   #21
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Hey wheelman! I gotta question:

With regards to the ratio between the wheel width and the tire width, what is the ideal or optimum number we should be aiming for? 80%? 85%? 90%?

I'm assuming that at (for example) 95%, the rim is almost as wide as the tire, and would probably have difficulty mounting. On the other hand, if the rim was only 65% the width of the tire, sidewall flex and/or other issues would probably make it a bad fit.

I'm also assuming that with a smaller sidewall (lower profile tire), your wheel-to-tire width ratio would be higher, as there's less sidewall to move "inwards".

Anyhow... ya... could you give me an answer to this? Or is it something I don't really need to care about? Or whatever!

Thanks!
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Old 04-16-2007, 12:56 AM   #22
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that is a hard one Z since almost every tire is dirrerent.... let say my 225/50VR15 BFG g-force sports and if BFG made a Traction T/A in the same size, with the same speed rating.... the actual contact patch is different, and depending upon how they cam out of the mold the beads could be closer or farther apart, making them easier or harder to mount.

As for personal preferance I like my tire to slightly overhang my wheel for 2 reasons (1) to protect my wheel on curbs (2) I like the little bit of extra width and the tiny bit of extra sidewall flex ya get
so to answer your question, if I had to put a # on it I would say wheel 95% of the tire contact patch width (NOT size i.e. 225/50R15)
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Old 04-16-2007, 08:29 PM   #23
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so to answer your question, if I had to put a # on it I would say wheel 95% of the tire contact patch width (NOT size i.e. 225/50R15)
Ok... your wheels are 15x7's, right? And a 225mm tire is about 8.9" wide... so the difference there is about 79%. So does that mean if you're aiming for a 95% ratio with the contact patch, then the contact patch is somewhere around 7.4" wide? If thats true, I'm surprised theres a 1.5" difference between tire width and contact patch... pretty big. I wonder how that would change with different types of tires, like you said. Or would the contact patch actually be wider...?

All very interesting. If there was a 7.5" or 8" wide wheel, would you have gone with that instead, yielding a 85% or 90% ratio between wheel & tire widths respectively? Do you think that might result in less sidewall flex?

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Old 04-17-2007, 10:04 AM   #24
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Whoa.... I just found out (from that other thread) that you can mount a tire thats more narrow than the rim. Who'd've guessed?! This is news to me..!!!
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Old 04-17-2007, 12:22 PM   #25
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what do you think about 215-40-17 wheels? Whould it destroy the car, is it better to go with 16? Need fast answer?
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Old 04-17-2007, 01:24 PM   #26
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What about some sort of list for the off sets too?
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Old 04-17-2007, 11:06 PM   #27
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Found a Good Visualizer:

http://customwheel.com/custom_wheels/default.php

Crappy Wheels... But what a good looking car!

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Old 04-18-2007, 07:59 AM   #28
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this one isn't that bad either


http://www.discounttire.com/dtcs/int...044489687!NONE
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Old 04-18-2007, 10:14 AM   #29
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Whoa.... I just found out (from that other thread) that you can mount a tire thats more narrow than the rim. Who'd've guessed?! This is news to me..!!!
you can, not recommended though, there are many shops that will not stretch tires, extreme stretches are unsafe and the tire shop becomes liable if that 6 inch wide tire were to come off that 10 inch wide wheel
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Old 04-18-2007, 10:17 AM   #30
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What about some sort of list for the off sets too?
for most applications a +42 offset will do, if you are looking to do something out of the norm (extreme lowering, extra wide tires/wheels) offsets will range accordingly
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Old 04-23-2007, 01:29 PM   #31
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Bump for all the noobs, I have been directing here anyway
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Old 04-24-2007, 04:37 AM   #32
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20"
225/30/20 1.57 inches taller than stock tire
speedo will read 6.607% slower than actual speed (aprox 5mph on e-way)

its like a jedi mind trick... I KNOW the speedo is reading lower, but sometimes it just doesnt register.

getting an actual % reminds me to pay better attention
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Old 04-26-2007, 12:48 AM   #33
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bump, I have been seeing a lot of tire chat threads again
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Old 05-02-2007, 03:52 AM   #34
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what offset can u suggest for 15x7 wid 205 55? i'm planning on getting rota slipstreams... thanx!
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Old 05-02-2007, 04:20 AM   #35
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+42
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Old 05-07-2007, 09:16 AM   #36
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the most beautiful, wondrous and amazing wheel and tire size calculator ever:

http://www.rims-n-tires.com/rt_specs.jsp

it covers pretty much EVERYTHING
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