Try the conversion tool on carbibles.com ... but given you are on 205/45R16 now expect to be on very, very low profiles on 18s. 215/35R18 rings a bell.
Painted on rubber might be thicker ;-)
Family Fleet: ex-Cayman Green 206 CC 2.0 LE, Indigo Blue 206 1.4 HDi Hatchback, Subaru BRZ Auto, Alfa Romeo MiTo
When requesting help of a technical nature, please give as much detail of the fault as possible along with details of exact model, engine size & type, gearbox, year, mileage, and any relevant work carried out to try to solve the problem to help us help you.
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Try the 16s for a while ... they are pretty harsh but handling is good with good tyres. Running ours on Hankook Evo V12 tyres which are around £90-100 a corner!
Last edited by gazza82 on Mon Oct 21, 2013 10:31 am, edited 1 time in total.
Family Fleet: ex-Cayman Green 206 CC 2.0 LE, Indigo Blue 206 1.4 HDi Hatchback, Subaru BRZ Auto, Alfa Romeo MiTo
Our 1.6 Allure is on 15" wheels, 195/55R15 Continental Premium Contact tyres. Still on the original tyres after 30,000 miles (except for one replaced after a puncture). The replacement cost £92.
I suppose I drive sedately but we've never had any handling issues and the comfort is fine. Averages 42mpg overall.
Ron
"If it ain't broke don't fix it!"
Golf 1.5 Tsi Evo SE Nav Estate Atlantic Blue
Polo 1.0 SEL DSG Reef Blue (wife's)
(Previously owned a 2005 206CC 1.6 Allure Moonstone for 10 years)