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 Mazzi sphinx rims, what now?

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Fade2Black
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Posted - March 11 2007 : 7:56a Reply with Quote Report this post to a moderator
HI all hope everyone is well. I have finally made a decision on the style of rims for my truck. They are called Sphinx made by Mazzi. Now the problem is I dont know what size I should run. The truck is a 07 Silverado 4WD, Z71,Classic body style,the rims are stock 17's. This is a daily driver so ride and comfort is important; but so is looking good and perfomance To give you a little info, I will be doing very little four wheelin with this. Its mostly to get back to my fishing and hunting areas and work. But I will go muddin from time 2 time also. I have thought about 20's but my concern is lack of rubber heavier, weight, and some loss of HP because of the weight. 18's would be cool but can I get rubber that will make it so I dont have to reprogram the pcm for speedo? Or should I just stay with the 17's. I am begging for opinions here. I dont know what to do and lack the knowledge needed to make a complete educated decision , and that is why Ihave come to the gurus...lol All ideas are welcomed. Thanks for the help all and keep up this great site.

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Siber Express
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Posted  - March 11 2007 : 8:13a Reply with Quote Report this post to a moderator
I went with 18's and the stock sized tires on mine.
If you are going to lift it any so you could run bigger tires I would do 20's, other than that I think I would go with the 18's for thew fact you will have more rudder between the road and rim

Toolmaann
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Posted  - March 11 2007 : 9:05a Reply with Quote Report this post to a moderator
18's would be cool but can I get rubber that will make it so I dont have to reprogram the pcm for speedo?

Use this tire size calcultor to find the 18" tire equal to, or close enough to your stock tire.

http://www.miata.net/garage/tirecalc.html

Mort
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Posted  - March 11 2007 : 11:03a Reply with Quote Report this post to a moderator


Those will look good as 18s, I think. You didn't say what your stock tire size is, but I imagine you could do a plus 1 tire/wheel combo and be just fine.

As for tire brand, I'm a big fan of BF Goodrich. For your uses, the All-Terrains sound like a good match. Great tread life, super quiet on the road, and they are decent in light offroading. If you're going to go out in the mud, the BFG Mud Terrains are better for that, but you'll trade off a little (not much) noise on the road.

As far as reprogramming the speedo, I'll give you the old "if you've gone this far..." argument. Most tire places (and all dealers) can reprogram the speedo for a nominal fee. Or, if you want to step up a little more, you can buy a power programmer and do it yourself, along with a few other tweaks that you might want to do. But that's something else to think about.

Tom in Tacoma
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Posted  - March 11 2007 : 11:42a Reply with Quote Report this post to a moderator
Going with a bigger rim doesn't necessarily cause more weight. Nor will going with a bigger rim cause you to have to reprogram.

If you go with a bigger rim you can still select a tire that's the same height as your stock size - and THAT is what you need to consider. Use the tire size calculator that Toolmaann posted up. Enter your stock size and then play around with the sizing of the 'new' tire until you get one that's really close the stock height.

Have fun!

Mort
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Posted  - March 12 2007 : 10:46a Reply with Quote Report this post to a moderator
Quote:
Originally posted by Tom in Tacoma

Going with a bigger rim doesn't necessarily cause more weight.




I agree to a point, however, I've driven some rigs where the only mod was large wheels and tires. You do feel a noticable loss of power. I've only found this on packages of 22" and larger, for the most part, unless you get into a much smaller vehicle. In a Silverado you won't even feel 20s.

Jason
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Posted  - March 12 2007 : 1:32p Reply with Quote Report this post to a moderator
your speedo will not be thrown off as long as you don't increase the overall diameter of the stock tire..you also shouldnt notice any power loss provided you don't go up in tire size as well but even if you do ...it's not going to be that bad. dealers put freakin 20s on their trucks/suvs stock..

my custom 20s are lighter than my old 17s
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