C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Wheel fitment Lost In Space

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Old 03-18-2016, 02:20 PM
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Wheel fitment Lost In Space

Right now my stock wheels are 17 in 7.5 front and 8.5 rear. I am going to upgrade to an 18 in wheel but I was reccommeded to change my tire from a 45 aspect ratio to a 40. In terms of clearance can I keep same tire aspect ratio or do I have to reduce to accomdoate the new diameter.

07 C230, Front wheel 225/45 R17, Rear Wheels 245/40 R17


Old 03-18-2016, 08:59 PM
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W203 & W204 3.0L 4matics & MR2 Supercharger
Front would become: 225/40R18
Rear would become : 245/35R18

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Old 03-21-2016, 11:32 AM
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2005 C230 Sport
The required measurements would be correct as stated above. What did you decided to do ?

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