4matic tolerance for different OD size tires
Thread Starter
Member
Joined: Jul 2015
Posts: 84
Likes: 10
From: Regina, SK, CA
2016 C450 AMG
4matic tolerance for different OD size tires
Hi everyone, I have a 2016 c450 AMG 4matic.
I have a bit of a situation here where I might need to have 225/40R19 Tires on the front axle, while leaving my 235/40R18 winter wheels on the back. I'm just wondering if 0.6 of an inch OD difference between the front and rear axles is too much for the 4matic system to tolerate with out excessivly stressing the center differential. I would need to travel about 1,000kms to get home from where we are currently.
Any info is appreciated.
I have a bit of a situation here where I might need to have 225/40R19 Tires on the front axle, while leaving my 235/40R18 winter wheels on the back. I'm just wondering if 0.6 of an inch OD difference between the front and rear axles is too much for the 4matic system to tolerate with out excessivly stressing the center differential. I would need to travel about 1,000kms to get home from where we are currently.
Any info is appreciated.
Member
Joined: Nov 2016
Posts: 84
Likes: 30
2017 C43 Coupe
Driving with that setup on a long trip will put a lot of stress on your differentials and potentially damage them. Your rear tire circumference is over 2 inches less than the front which means your rear wheel speed will be 3.8mph faster than the front. The diameter difference between front and back is 2.63%. That's close to the 3% acceptable limit. If your tires are not the same brand and model, that will make it worse. Your awd system will not work properly (overworked) affecting the stability control and braking systems.
Last edited by l3m; Jan 1, 2023 at 12:10 AM.
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Joined: Dec 2019
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Hi everyone, I have a 2016 c450 AMG 4matic.
I have a bit of a situation here where I might need to have 225/40R19 Tires on the front axle, while leaving my 235/40R18 winter wheels on the back. I'm just wondering if 0.6 of an inch OD difference between the front and rear axles is too much for the 4matic system to tolerate with out excessivly stressing the center differential. I would need to travel about 1,000kms to get home from where we are currently.
Any info is appreciated.
I have a bit of a situation here where I might need to have 225/40R19 Tires on the front axle, while leaving my 235/40R18 winter wheels on the back. I'm just wondering if 0.6 of an inch OD difference between the front and rear axles is too much for the 4matic system to tolerate with out excessivly stressing the center differential. I would need to travel about 1,000kms to get home from where we are currently.
Any info is appreciated.
Driving with that setup on a long trip will put a lot of stress on your differentials and potentially damage them. Your rear tire circumference is over 2 inches less than the front which means your rear wheel speed will be 3.8mph faster than the front. The diameter difference between front and back is 2.63%. That's close to the 3% acceptable limit. If your tires are not the same brand and model, that will make it worse. Your awd system will not work properly (overworked) affecting the stability control and braking systems.
