What are the specifications for upgrading to 19-inch wheels on a Mercedes-Benz C-Class?
2 Answers
Data includes: Original AMG 19-inch wheels and tires for the Mercedes-Benz C63. Original 19-inch forged wheels for the C63 AMG + Michelin PSS racing tires. Wheel specifications: Front 245/35/19 8.5Jx19H2 ET38; Rear 265/35/19 9.5Jx19H2 ET56, standard tires, possible lowering of the chassis later. Changes after the upgrade: 19-inch wheels will be wider compared to the original ones, and of course, the tire noise will be louder. Another issue is that the larger the wheel, the thinner the tire sidewall. Overall, if the Mercedes-Benz C-Class is fitted with 19-inch wheels, it may be less practical. While 19-inch wheels look better, the front tires with a 40 aspect ratio and rear tires with a 35 aspect ratio will directly result in more concern when driving over potholes. On unstable road surfaces, the feedback to the driver will be much more pronounced. It will definitely be bumpier, and the tires will be more prone to bulging. Therefore, if you are considering upgrading to 19-inch wheels for your Mercedes-Benz C-Class, it is recommended to avoid frequently driving on bumpy roads and to replace the springs at the same time as the wheels.
When I modified my Mercedes C-Class with 19-inch wheels, I researched various specifications. The crucial bolt pattern is 5x112mm, which is the standard for Mercedes vehicles – you must confirm this match before purchasing wheels. The recommended offset (ET) range is between 35 to 50; ET45 is quite common as it prevents rubbing against the suspension or brake calipers. Wheel width is typically around 8J, and pairing it with 245/35R19 tires is a safe choice for both aesthetics and ride comfort. Additionally, the center bore diameter is usually 66.6mm, though many wheels are labeled 67.1mm or other sizes – using hub-centric rings is advised to ensure secure installation. Post-modification, always check wheel arch clearance and don’t overlook tire-suspension harmony: larger wheels may increase ride harshness, so I opted for lightweight wheels to improve handling. Ultimately, have a professional shop take precise measurements to avoid rework.
