LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

changing wheel size?'s

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Old Jul 26, 2003 | 11:26 AM
  #1  
94YellowTAGT's Avatar
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From: Springfield, MO, USA
changing wheel size?'s

going from 245/50/16 to 275/40/17. how much will my speedo be off?
Old Jul 26, 2003 | 11:50 AM
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Scream And Fly's Avatar
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Not sure, but I'm doing the same exact swap next week, so I'll let you know!

Greg
Old Jul 26, 2003 | 11:53 AM
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It's negligible at the most. No more than 1-2 mph. I've been running like this on my 93 for a couple of years now.
Old Jul 26, 2003 | 11:56 AM
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They both have the same tire diameter. So it will not throw off the speedo.
Old Jul 26, 2003 | 12:03 PM
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So here's my question:

What size tire would it take to move to an 18" rim and not throw off the speedo??
Old Jul 26, 2003 | 12:09 PM
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You should be fine with 285/35/18. Tire wear will make up any difference between the two.

Originally posted by Fastbird93
So here's my question:

What size tire would it take to move to an 18" rim and not throw off the speedo??
Old Jul 26, 2003 | 12:55 PM
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94YellowTAGT's Avatar
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thanks for the help!

Kevin
Old Jul 26, 2003 | 04:08 PM
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I've got 275 35 18's and the speedometer reads the same since the height is the same/
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