Wheels & Tires Grabbing the road and stopping.

What size for New Tires?

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  #31  
Old 02-08-2007, 08:54 AM
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a 235-45-17 will be approximately 25.33 inches tall or a circumference of 79.6 inches, versus a 235-50-17 at 26.252" or a circumference of 82.4.
 
  #32  
Old 02-08-2007, 09:41 AM
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What are the measurements of the stock 215/55/17 tire?
 
  #33  
Old 02-08-2007, 10:20 AM
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approximately 26.311. (82.65). These sizes are based on theoretical values and actual sizes will vary by manufacturer.
 
  #34  
Old 02-08-2007, 01:54 PM
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So they are both a bit smaller than the stock tire and each wider. The advantages of the wider tire would be better handling and traction... correct.
 
  #35  
Old 02-08-2007, 04:19 PM
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Originally Posted by ron4row2
So they are both a bit smaller than the stock tire and each wider. The advantages of the wider tire would be better handling and traction... correct.
Ronnie--
Yes, you are correct. An additional advantage of a smaller sidewall (what has been recommended so far) is lower sidewall flex, and therefore better handling. Front tires will last a bit longer too, or at least wear evenly, since they won't have the tendency to roll over onto the sidewall under hard cornering.
 
  #36  
Old 02-08-2007, 07:13 PM
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Originally Posted by IP05G35
The wheel gap will be a lot larger with 45 tires compared to the 55 tires.
Not with Z springs
 
  #37  
Old 02-09-2007, 11:05 AM
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Originally Posted by forourspam
Ronnie--
Yes, you are correct. An additional advantage of a smaller sidewall (what has been recommended so far) is lower sidewall flex, and therefore better handling. Front tires will last a bit longer too, or at least wear evenly, since they won't have the tendency to roll over onto the sidewall under hard cornering.
That being said, would the 45 or 50 series tire be better?
 
  #38  
Old 02-10-2007, 11:26 AM
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Originally Posted by ron4row2
That being said, would the 45 or 50 series tire be better?
Go with the 45s. Then, in due time, if you think the wheel gap is too large we can drop you with a set of Eibachs (P/N 6363.140). One of the cheapest first mods you can do (around $200 with a DIY install). Call me up if you have any questions.
Cheers,
SK
 
  #39  
Old 02-11-2007, 02:22 PM
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I'll touch base with you before I buy the tires.
Thanks for the help.
 
  #40  
Old 02-11-2007, 11:28 PM
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I would suggest using a calculator to get the proper fitment. My '00 TL came from the factory with 205/60R16 tires. I wanted a bit more meat, so I used this website's chart:
http://www.tirereview.com/?type=cc&i...3c73d=179#plus

to come up with my meatier 215/55R16s and I was super happy. Not a squeak outta those tires the entire time, and they stuck!
 
  #41  
Old 02-12-2007, 10:28 AM
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you will definitely have to drop it a bit if you go with 235-45-17 .... personally i prefer 225-50-17 whcih is a better compromise if you want a smaller sidewall then the OEM 215-55-17..... and want to remain on OE suspension.
 
  #42  
Old 02-21-2007, 09:48 PM
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I just ordered the Kumho Ecsta SPT 225/50/17 tires all around for my 05. Should be a good upgrade over the stock Goodyears.
 
  #43  
Old 02-21-2007, 10:16 PM
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i got 235/45/r17's all around and im on s-techs so far no ribbing issues what so ever. Very happy with the overall look =o)
 
  #44  
Old 02-21-2007, 11:03 PM
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Unbelievable! 42 replies and not a single Tire Size Calculator link... http://www.miata.net/garage/tirecalc.html. C'mon guys... technology is your friend!

Enter the stock size 215/55/17 and the alternative size you're comparing, and the tool will tell you how much taller/shorter, wider/narrower, etc. and also how much your speedo will be off.

Have fun!
 
  #45  
Old 02-21-2007, 11:24 PM
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Keep the diameter & width close to stock.

You never want to significantly change the diameter no matter what.

Width depends on rim.

.
 


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