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View Full Version : Same size on all four?


Johng
10-03-2011, 07:16 PM
I am considering putting the OEM rear tire size on all four. I have an extra set that will work, but am unsure of any potential problems I will experience by doing this. Anyone have any feedback?
drewb457
10-03-2011, 07:21 PM
it will most likely throw off the ABS and if you have an 04 it will throw off the TC. and look funny
OneBADLsE
10-03-2011, 07:51 PM
Paul (blackened300a) has 255/55's all around. It looks great imho
fastblackmerc
10-03-2011, 08:24 PM
2003's have no traction control so you'll be OK.

2004's have traction control so you have to remember to turn is off after starting the car.
fordfnatix
10-03-2011, 08:30 PM
That's a good question.I'm interested in the answer as I am running all the same on mine.It's an 2003 and it has the tc button. I just turn it off all the time.(255/50/18)all around
fastblackmerc
10-03-2011, 08:32 PM
That's a good question.I'm interested in the answer as I am running all the same on mine.It's an 2003 and it has the tc button. I just turn it off all the time.(255/50/18)all around

See post #4.....
fordfnatix
10-03-2011, 08:35 PM
but I have the tc button?am I missing something?
fastblackmerc
10-03-2011, 08:38 PM
but I have the tc button?am I missing something?

If you have the TC button then follow everything for the 2004 model.

BTW... TC can not be turned off in a "tune".
MyBlackBeasts
10-03-2011, 08:42 PM
but I have the tc button?am I missing something?

If you have a 2003, with TC button, then you have a 300b.
Bigdogjim
10-04-2011, 12:09 AM
I have been running 245/55/18 on all 4 since 2005 with issues on a '03-A (no T/C) the car does handle better with the bigger size up front:)
Bluerauder
10-04-2011, 04:03 AM
2003's have no traction control so you'll be OK.

2004's have traction control so you have to remember to turn is off after starting the car.


See post #4.....


If you have the TC button then follow everything for the 2004 model.

BTW... TC can not be turned off in a "tune".


If you have a 2003, with TC button, then you have a 300b.

After nearly 9 years of MM.Net posting on this most basic of MM questions, I find it hard to believe that it took 9 posts for the correct answer to show up. :rolleyes:

Traction Control came on the late 2003 MMs (known as 300Bs) and all 2004 MMs. If you have the TC, then you will have to maintain a 3% - 6% taller tire on the rear to make the TC happy or you will have to "turn off" the traction control every time you start the car.
Captain Dynball
10-04-2011, 05:33 AM
Just put 255/45/18's all the way around last night. Noticed the T/C flipped out when I was getting on the highway. Turned it off....all is well. Car handles way better!!