Difference - 205/55/15R vs. 225/55/16

[420SE]

Hello folks

I own a G-reg 420SE Mercedes.

I would like to change the alloys as over the cars 15 odd years, they
are starting to show their age, unlike the rest of the car

Now, I found these on eBay:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=8041026174&fromMakeTrack=true

They are described as 225/55/16.

Now, the current tyres on my current alloys state 205/55/15R.......does that mean that the above are not suitable? Or if they are, what is the difference between 205 and 225?

Any help appreciated

 

[420SE]

Or perhaps these would be better? But they are 195 - would I be able to fit 205 tyres on them?

http://cgi.ebay.co.uk/Mercedes-8-Ho...ryZ10398QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Tip top condition it seems

 

[Flash]

225/50/16 would be fine on your W126...

225 is a wider tyre and will be ok on your car.

 

[KLP 92]

you have the wrong size tyres at the momemt. You should have 205 65 15!

225 55 16 will fit if the cars not lowered.

 

[Rory]

This link http://www.miata.net/garage/tirecalc.html compares the dimensions of different tyres, indicating the likely effect on your speedo.

 

[420SE]

thanks to all for all their help!