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Discussion Starter #1
Hello people,

I like to get bigger 19" wheels on my CLA220CDI...like on the CLA45.
The wheel specifications on my car's conformity certificate do not mention 19"
wheels...(only up to 18" with 235 tyre)
Probably the CLA45 has different drivetrains.
But I was wondering if anyone has tried it yet or does now more about this topic?

Greets!
 

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Discussion Starter #3
Nice!
How wide can we go with 19" then?
I'd like to go at least 245-255 tire width...
but I'm afraid that not possible on my 220CDI.
 

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I have 19' wheel for my car and its service is average so if you want to ask anything about this car wheel then just ask.I will answer you.
auto body part
Question, do the dealers have the ability to recalibrate the odometer and speedometer so it can read correctly with the larger tire? (given that you are increasing the overall diameter of the tire)

Would you please expand on your comment that the service is average?, what do you mean with that?, one of my concerns with RFT with 19" (and even with the 18") is the stiffness of the ride, and the risk of getting damaged with any pothole if you hit it too hard, how would you rate that in your CLA with 19"
thanks
 

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Question, do the dealers have the ability to recalibrate the odometer and speedometer so it can read correctly with the larger tire? (given that you are increasing the overall diameter of the tire)

Would you please expand on your comment that the service is average?, what do you mean with that?, one of my concerns with RFT with 19" (and even with the 18") is the stiffness of the ride, and the risk of getting damaged with any pothole if you hit it too hard, how would you rate that in your CLA with 19"
thanks
You can go up in wheel size and still keep your diameter the same, you will have less of a sidewall and the ride may feel stiffer to some. If you went with the same size tire that comes stock but only in 19" than the diameter would be different and thus the odo would be off. Tire rack does show you the proper tire size when going up in wheel size to keep diameter the same. They may not have all the info yet because the car isn't out yet.
 

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Pulled this off of tire rack. If you go to the site they show the illustration. For some reason it didn't show up.
Plus Sizing 101
Thursday, June 9, 2011 by Gary Stanley
4 Google +13
After many years of working at Tire Rack, I find that it can sometimes be easy to take for granted some of the information and concepts that I use on a daily basis. One such concept called plus sizing may be well known in the tire industry, however many consumers aren't familiar with how it works.

What is plus sizing?

Plus sizing is the process of using larger diameter wheels mounted with lower profile tires.

Why plus size?

The purpose for using lower profile tires in plus sizing is twofold. First, doing so maintains the overall diameter of the Tire & Wheel Package. This is important to keep the accuracy of your odometer, speedometer and other vehicle instrumentations. Second, plus sizing with a lower profile tire often leads to more responsive handling and a better cosmetic appearance.



Notice that while the wheel diameter increases, the tire profile decreases. It's that simple.

You don't have to do the math on your own! Our website fitment specialists already know what size to use on your vehicle.
« Previous PostNext Post »
- See more at: Plus Sizing 101 - Make Driving Fun with Performance Tires & Wheels | Tire Rack
 

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You can go up in wheel size and still keep your diameter the same, you will have less of a sidewall and the ride may feel stiffer to some. If you went with the same size tire that comes stock but only in 19" than the diameter would be different and thus the odo would be off. Tire rack does show you the proper tire size when going up in wheel size to keep diameter the same. They may not have all the info yet because the car isn't out yet.
Milazzo, I think I understand the relatinship between rim size and tire offset, in this case, the closest to match the overall total diameter of the tire will be an orange peel tire 225/30 and still there will be a difference of about 3 mm in diameter that is probably negleageable, but, It would have a hell of a rough ride, if my math is correct, the 17" has an offset of 101.3 mm, the 18" 90.3 mm and the one to match the 19" rim would be a whooping 67.5 mm (60% of the 17" tire!!!).
 

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Milazzo, I think I understand the relatinship between rim size and tire offset, in this case, the closest to match the overall total diameter of the tire will be an orange peel tire 225/30 and still there will be a difference of about 3 mm in diameter that is probably negleageable, but, It would have a hell of a rough ride, if my math is correct, the 17" has an offset of 101.3 mm, the 18" 90.3 mm and the one to match the 19" rim would be a whooping 67.5 mm (60% of the 17" tire!!!).
Yeah that's why I said the 19" will have less sidewall and a stiffer ride. My current car is 255/35 19. I also have 18" winter wheels but going back and forth between the two it's not a harsher ride in the 19" for me. Everyone is different on what they feel is harsh.


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milazzo
IN your case, I understand that 19" would not be that bad, your tire width is large (255), in terms of net offset, your 255/35 is equivalent to the 18" 225/40, but the 225/30 (to meet the OP requirements) would probably feel almost like riding without tires and on the bare rim. I agree with you, perhaps this is acceptable for some that have different gauge to sustain a stiff ride.
 

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milazzo
IN your case, I understand that 19" would not be that bad, your tire width is large (255), in terms of net offset, your 255/35 is equivalent to the 18" 225/40, but the 225/30 (to meet the OP requirements) would probably feel almost like riding without tires and on the bare rim. I agree with you, perhaps this is acceptable for some that have different gauge to sustain a stiff ride.
Yep. Agreed. It is less and would thus be harsher.


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milazzo
IN your case, I understand that 19" would not be that bad, your tire width is large (255), in terms of net offset, your 255/35 is equivalent to the 18" 225/40, but the 225/30 (to meet the OP requirements) would probably feel almost like riding without tires and on the bare rim. I agree with you, perhaps this is acceptable for some that have different gauge to sustain a stiff ride.
I've got 295/30s on the back of my C4S. They're not bad at all but I wouldn't necessarily go +1 with them.

-Eric
 
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