Hello,
The Astra handbook lists seven different tyre sizes that can be fitted to the car. They are:
185/65r15 195/60r15 215/45r17 225/40r18 195/65r15 205/55r16, which is what is on at the moment, I think 225/45r17I haven't worked out what circumferences all these would have. Are these sizes all "plug and play", i.e. can you swap them without any adjustment, or do they have different circumferences and would I need to get the car's computer reprogrammed to tell it what size rim was on each time I swapped wheel sizes?
I ask because I'm thinking about getting some winter tyres in the summer, before the prices go up ;)
The manual says not to use 17 inch rims or above with winter tyres but it does not recommend any one size. I'm wondering whether to get winter tyres that are the same size as the ones that are on now, which would be simplest but the 15" rim size are slightly cheaper, so I am wondering if I bought 15" rims and went with 195/65r15 rather than
205/55r16 whether I would have to do anything to recalibrate the speedo for example.Thanks, Stephen.