Tyre size change

[Banner Rav]

My Icon is due a change of front tyres and wondering if anyone has gone for a slightly higher profile to help with ride quality. I was thinking of putting on 225 60 18's instead of the original 235 55 18's. Going by online height calculators it will change by less than 12mm and speedo should actually read a little lower and more accurately (currently +6% if measured against sat nav). 18" wheels look great but on poorly surfaced Irish roads a little more cushioning would be great. Don't want to upset the handling though so if anyone has tried this, their opinions would be very much appreciated.

[FROSTYBALLS]

Sat navs provide an average speed across a number of points.

Speedometers legally have to read optimistically. To find out the effect of the change in tyres one would need to use an online calculator to determine how the spedometer is affected, and whether it complies with your country's legislation. One's insurance company should be informed of the change in wheel or tyre, as they may consider it a modification.

For example within the EU (UK excepted) speedometers must never read less than the actual speed, and must not read morethan 110% of the actual speed.

Within the UK, again the speedometer must never read less than the actual speed and not more than 110% of the actual speed, except for speeds between 25 and 70mph where they must read not more than 110% + 6.25mph.  

 

[Banner Rav]

Online calculator reckons less only 1mph difference at 60mph so doesn't look like it would be an issue. Actually looked up the full owners manual on the Toyota site this evening and 225 60 18 is an actual tyre size listed for the Rav so might we worth a try

[_dct_]

Hi Brian,

Just wonder if you did change your tyres to 225/60r18 in the end? If so did it improve ride comfort a lot?

Thanks, W.