Tallest tire that fits stock height xB with factory 16" wheels - Scion XB Forum
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post #1 of 15 (permalink) Old 11-18-2014, 07:52 PM Thread Starter
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Default Tallest tire that fits stock height xB with factory 16" wheels

I'm looking for help choosing the tallest tire I can fit on my xB. It's a 2013 10 Series, totally stock. I just bought my xB on Saturday, and then we had our first snow storm of the season on Sunday, and the 'Bs belly was rubbing across the snow a bit.
So for just for the winter months I would like to increase the ground clearance by running taller tires. I tried searching the net but couldn't find much info about making an xB taller and that's why I'm asking all of you.

The tire size I am thinking is 215/60R16 on the stock wheels. The 215s are about 1.25" taller netting me a gain of about 5/8" in ground clearance. That would put me at the same height as my last car that went through the snow fine.

So has anybody on here installed this size tire on their xB? Any tire rub issues or other problems I need to know about?

Thanks!

xBTom
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post #2 of 15 (permalink) Old 11-18-2014, 08:14 PM
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I personally wouldn't do that, but...

On paper, 205/65/16 should fit. I wouldn't go any larger.
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post #3 of 15 (permalink) Old 11-18-2014, 10:47 PM Thread Starter
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So Paul, you're saying 205/65/16 with a height of 26.5" will fit? That's good to know. I was thinking 215/60/16 which is slightly shorter than you suggested (26.1" vs. 26.5").

Can anyone provide pics of these tires sizes on their xB, along with any suspension mods or wheel differences that may affect how they fit the vehicle?

Thanks!

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post #4 of 15 (permalink) Old 11-19-2014, 03:28 PM
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You've got plenty of clearance in the wheel wells for a taller tire. Like Paul said I personally wouldn't do it because the taller diameter will through off everything related to the tire rotation, but it's your choice.

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post #5 of 15 (permalink) Old 11-19-2014, 08:12 PM Thread Starter
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Thanks. How much clearance is needed between the top of the tire and the bottom of the strut plate directly above it?

I imagine lowered xBs have to keep a certain amount of clearance between the tire and strut plate, correct?

Thanks!

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post #6 of 15 (permalink) Old 11-19-2014, 10:48 PM
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I want to say the limit would be 27" overall diameter.

It's a lousy shot, but here is mine when I was test fitting some 18's for width clearance and you can see that from the wheel to the lower perch is 4.5-5" so I would think anything under 27" overall would be ok. Obviously you aren't getting chains on them if you need to.


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post #7 of 15 (permalink) Old 11-21-2014, 01:40 AM Thread Starter
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That's a great pic Greg--thanks!

After using various online tire calculators, the taller tires I want will have the tire .2" closer to the suspension on the inside and .2" closer to the fenders on the outside. Based on my measurements that should be no problem.

The tire will be .625" taller (5/8") and also have 5/8" clearance between the top of the tire and the bottom of the lower spring perch on the front. Again I don't think this will be a problem.

Now what I'm wondering is what (if any) probs could I have with ABS/VSC/traction control systems? I understand it may take longer to stop with the taller and slightly heavier tires, but will it turn on any dash lights or render these systems inoperable?

Searching online, I've read that factory ECU's can tolerate anywhere from a 3% to 15% variance in tire diameter. But I can't find anything specific about the xB. Are there any knowledgeable persons or Toyota/Scion techs hanging out on these boards that can provide more insight on this?

Thanks!

xBTom

Last edited by xBTom; 11-21-2014 at 01:44 AM.
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post #8 of 15 (permalink) Old 11-21-2014, 04:04 PM
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In day to day driving I honestly don't think you have any problems with any of those functions. Both the stability and traction control are more related to differences between wheels as if you were sliding or slipping on wheel over another. The abs is where I have a concern but only because it will kick in a little bit earlier. Again not an issue in day to day driving. Just remember that your speedometer is going to be off and you are going faster than it says you are.

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post #9 of 15 (permalink) Old 11-21-2014, 04:37 PM Thread Starter
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Thanks Greg. Although, I'm not sure what you mean when you say the ABS will kick in earlier. Could you be more specific? Like, will the ABS will be easier to trigger in a panic situation?

Thanks!

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post #10 of 15 (permalink) Old 11-22-2014, 03:22 PM
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Quote:
Originally Posted by xBTom View Post
Thanks Greg. Although, I'm not sure what you mean when you say the ABS will kick in earlier. Could you be more specific? Like, will the ABS will be easier to trigger in a panic situation?
Yes. Since the tires are taller the rotation for a given speed will be slower at the center of the tire and will cause the ABS to engage earlier than it normally would. It's not an issue 99% of the time it only means that in that 1% it will kick in a hair earlier than it normally would. In a panic stop I don't think it'll make a difference because the brakes will be slammed on full force anyway. More of an issue in performance diving, which I assume you won't be doing in the snow.

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