Hi Culzean, thanks for the reply. My reason for wanting to put the Civic wheels on my Jazz, is so I can keep the almost new set of Dunlop Bluresponse tyres they're wearing. I put the figures into the site you posted and as far as I can make out, they would affect the speedo in a good way, in so far as actual speed is 2mph less than indicated at 30mph and 4mph at 60. I'd be grateful for your thoughts. I like comfort under my bum, and I don't want to turn the radio up to cover road noise, the Dunlops are the lowest decibel rating I could find at 68. Also, would the increased diameter of 32mm cause any fouling issues under the arches?
RP