Just installed Volk G25
Thread Starter
Member
Joined: Oct 2008
Posts: 97
Likes: 0
From: Waterloo, On
09 C63 K2
Just installed Volk G25
I have installed G25 19x9.5 50mm rear and 19x8.5 45 mm front.
Comparing with stock 18" wheels, installation of G25 makes whole car more alive. Braking, acceleration is faster, turning is easier. It is like whole car becomes lighter and more nimble.
I think Michelin PSS (275/30/19) is a good match - they weight only 26 lb rear.
Majority of other tires are slightly heavier.
At the beginning I had a problem - vibration, more on high speed.
The cause was that the center bore of C63 is 66.5 mm and a wheel has 73.1mm. Mechanic installed these wheels without hub ring and they were not properly centered.
I improved the wheel centering, but still need to find good hub rings. Which manufacturer would be better, considering that it should not be plastic?
Comparing with stock 18" wheels, installation of G25 makes whole car more alive. Braking, acceleration is faster, turning is easier. It is like whole car becomes lighter and more nimble.
I think Michelin PSS (275/30/19) is a good match - they weight only 26 lb rear.
Majority of other tires are slightly heavier.
At the beginning I had a problem - vibration, more on high speed.
The cause was that the center bore of C63 is 66.5 mm and a wheel has 73.1mm. Mechanic installed these wheels without hub ring and they were not properly centered.
I improved the wheel centering, but still need to find good hub rings. Which manufacturer would be better, considering that it should not be plastic?
Member
Joined: Sep 2009
Posts: 227
Likes: 17
From: Planet Earth
2011 C63 P31 2015 BMW X5M Schwarz Einhorn w/Bootmod3
NICE! Excellent choice of tires too. Btw, curious to know the weight comparisons between oem vs. rays? Good luck with the hub centric rings, I wish I could offer some help...
Thread Starter
Member
Joined: Oct 2008
Posts: 97
Likes: 0
From: Waterloo, On
09 C63 K2
As soon as I put my old setup back to wear them out, I will check it.
In the shop they had Rays RE30 I believe and G25 were slightly heavier I think.
Before I had the rotational mass gradually increased.
Rear tires were changed from Pirelli 255/35/18 (24 lb) to Bridgestone Potenza RE760 275/35/18 (28 lb).
Later I changed front Pirelli 235 (25 lb) to Bridgestone 245 (29 lb).
When I put 275 wheels first time, I was happy, that wheel spin was reduced. But it was reduced not only because tires become wider. The second reason was that they become heavier.
With all these wheels and rims on a drag strip my car with kleemann was not much faster than non-cpu modified c63 with original wheels.
I noticed a big difference when had lighter winter setup with replica wheels.
This shows me, that C63 needs to have light wheels to be alive
Last edited by vkam; Jul 1, 2012 at 10:44 PM.
Trending Topics
Super Member
Joined: Jul 2008
Posts: 583
Likes: 23
From: Colorado
2021 E63 S Sedan
I have installed G25 19x9.5 50mm rear and 19x8.5 45 mm front.
Comparing with stock 18" wheels, installation of G25 makes whole car more alive. Braking, acceleration is faster, turning is easier. It is like whole car becomes lighter and more nimble.
I think Michelin PSS (275/30/19) is a good match - they weight only 26 lb rear.
Majority of other tires are slightly heavier.
At the beginning I had a problem - vibration, more on high speed.
The cause was that the center bore of C63 is 66.5 mm and a wheel has 73.1mm. Mechanic installed these wheels without hub ring and they were not properly centered.
I improved the wheel centering, but still need to find good hub rings. Which manufacturer would be better, considering that it should not be plastic?
Comparing with stock 18" wheels, installation of G25 makes whole car more alive. Braking, acceleration is faster, turning is easier. It is like whole car becomes lighter and more nimble.
I think Michelin PSS (275/30/19) is a good match - they weight only 26 lb rear.
Majority of other tires are slightly heavier.
At the beginning I had a problem - vibration, more on high speed.
The cause was that the center bore of C63 is 66.5 mm and a wheel has 73.1mm. Mechanic installed these wheels without hub ring and they were not properly centered.
I improved the wheel centering, but still need to find good hub rings. Which manufacturer would be better, considering that it should not be plastic?
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
MBWorld Fanatic!
Joined: Sep 2011
Posts: 1,294
Likes: 1
2012 C63 coupe
I had conflicting reports myself. I checked with the vendor and was initially told they were NOT hubcentric. Then, I was told they were. Now, they appear not to be. Had they been hubcentric, I would have bought a set.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 4,563
Likes: 42
C63 AMG
I dont know why your so caught up with hubcentric? Centering rings are not a big deal. Ive run them at the track. They stick to the rim and not the hub for me. Which is not a big deal IMO
MBWorld Fanatic!
Joined: Sep 2011
Posts: 1,294
Likes: 1
2012 C63 coupe
I'm probably too paranoid about them, no doubt. I have had issues with metal rings fusing to the hub in the past and my logic is that it is just one more thing to deal with which you can avoid with a wheel built properly for the car. Plastic centering rings have and can melt with track use. Metal centering rings can and have fused to the hub and can be a real nuisance to get off. For some it isn't an issue but for me, I just hate dealing with that stuff. If the car was never tracked, I couldn't care less. For a car that is tracked, it feels like using band aids to get wheels to fit properly and then throwing them into a really abusive and demanding environment at the track.
Last edited by gthal; Jul 8, 2012 at 05:53 AM.
MBWorld Fanatic!
Joined: Sep 2011
Posts: 1,294
Likes: 1
2012 C63 coupe
The centre bore of some wheels is larger than the hub of the C63. Therefore, when you install the wheel, it does not sit firmly on the hub and that can cause vibration issues and also puts all of the load on the bolts. A centering ring is used to correct this. It is effectively a little ring that sits inside the wheel bore to allow it to properly mate to the hub. They can be plastic or metal. Plastic ones are known to melt from excessive heat at the track. Metal ones can sometimes fuse to the hub which makes putting other wheels on a pain as it is difficult to remove.
If the wheel bore does not match the hub, you need a centering ring to properly mount the wheel. OEM and other wheels made specifically for the car do not need these rings.
If the wheel bore does not match the hub, you need a centering ring to properly mount the wheel. OEM and other wheels made specifically for the car do not need these rings.
Super Member
Joined: Jan 2007
Posts: 617
Likes: 1
From: San Diego
MB
The thing I don't like about them is if you have to take your car to a Discount Tire (or similar) and they neglect to put them back on.
