Notices
Cayenne 955-957 2003-2010 1st Generation
Sponsored by:
Sponsored by:

Front/Rear Tire mismatch??

Thread Tools
 
Search this Thread
 
Old 02-24-2007, 01:50 PM
  #1  
charlieXS
Pro
Thread Starter
 
charlieXS's Avatar
 
Join Date: Feb 2006
Posts: 577
Likes: 0
Received 0 Likes on 0 Posts
Default Front/Rear Tire mismatch??

This morning I go outside and see that one of my 285/35-22's is flat, must have picked up a nail or whatever... I have to leave SOON to drive 2 hours across L.A.... can I just bolt on 2 of my old 235/65-17 wheels/tires on the FRONT??? And leave the 22's on the rear?? I can get it repaired on Sunday, but need the car today.

The 285/35-22's are 30" tall... the 17's are 29.1" tall. So the car's computer may think the front wheels are turning FASTER than the rears... is this a problem?

thx
Old 02-24-2007, 02:01 PM
  #2  
henna gaijin
Intermediate
 
henna gaijin's Avatar
 
Join Date: Mar 2006
Posts: 45
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by charlieXS
This morning I go outside and see that one of my 285/35-22's is flat, must have picked up a nail or whatever... I have to leave SOON to drive 2 hours across L.A.... can I just bolt on 2 of my old 235/65-17 wheels/tires on the FRONT??? And leave the 22's on the rear?? I can get it repaired on Sunday, but need the car today.

The 285/35-22's are 30" tall... the 17's are 29.1" tall. So the car's computer may think the front wheels are turning FASTER than the rears... is this a problem?

thx
Yes, it's a problem.

As I understand it, the AWD system is happy with tires that are all within 0.5" in circumference.

Assuming your diameter dimensions are correct, the 17's are 91.42" in circumference while the 22's are 94.25" in circumference - a difference of 2.83" - well beyond the 0.5" limit.

Exactly what will be affected/damaged (PASM, ABS, Center Differential, etc.) I will leave for others, but it doesn't sound like a good idea.

HTH
Old 02-24-2007, 02:23 PM
  #3  
99firehawk
Drifting
 
99firehawk's Avatar
 
Join Date: Jul 2004
Location: MIAMI
Posts: 3,105
Likes: 0
Received 5 Likes on 5 Posts
Default

dont do it, change all 4 or your going to have serios driveabilty and braking issues and oculd damged the tcase and axles
Old 02-24-2007, 03:46 PM
  #4  
charlieXS
Pro
Thread Starter
 
charlieXS's Avatar
 
Join Date: Feb 2006
Posts: 577
Likes: 0
Received 0 Likes on 0 Posts
Default

that's what I thought... I just changed out all 4.
thanks!!!



Quick Reply: Front/Rear Tire mismatch??



All times are GMT -3. The time now is 01:51 PM.