Technical tyre sizes

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Did a quick search on subject but no definitive answers, currently run a 500c twin air and a Panda 1.2 eleganza.
On the panda I "upped" the profile size and got a better ride etc.with no clearance issues. So my question is can I again go this route with the 500 (original size is 185-55-15) can I go to 185-65-15's or will there be clearance problems, Anyone done it ? any problems?
(I know the speedo will be a little out but sat-nav gives correct reading)
ThanksJohn B

 

[306maxi]

The 500 is hardly uncomfortable on 15" wheels, tbh i wouldn't bother, you're only upping the gearing, adding more weight with a bigger tyre and making it handle more like a boat, just my opinion though.....

 

[The Twins]

2nd that maxi.

 

[306maxi]

2nd that maxi.

I just see it as a solution to a problem that never existed in the first place.

 

[ahmett]

Go 195/50 R15. That's what I have done and the car feels better as a result.

 

[The Twins]

I agree Ahmett (its what I did too) but 196/50/15 will technically make the tyre a slightly smaller rolling circumference than 185/55/15.