2009 Mercedes A150 classic - Tyre sizes

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Wed 3 Aug 2011 18:12
2009 Mercedes A150 classic - Tyre sizes - mike the bike

I recently bought this car with 16"alloys and 195/55 tyres - usually fitted I believe with 15" alloys and 195/65 tyres. When I need to replace tyres, can I use 195/65 on the existing alloys, as in theory this should give a slightly gear ratio, a more relaxed cruise and improved mpg?

I would value your comments. Thank you in anticipation.

M B Harvey.

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Wed 3 Aug 2011 18:53
2009 Mercedes A150 classic - Tyre sizes - unthrottled

In theory, yes.

Dunno about other tyre fitters but Costco are very squiffy about fitting 'incorrect' tyre sizes.

You'll increase the diameter by ~6%-a useful increase. The speedo will be slightly out but since they tend to ~5% optimmistic not a big deal. If the wheel archs are tight, clearance might be an issue-doubt it though.

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