Tyre size changes should always be done in consultation with the OEM service representative, one can also refer to the car service book or manual for such decisions
I am buying Nissan sunny XL diesel is it necessary to change tires as this version comes with 14" tires should i fit 15" tiers if must
First of all Heartiest Congratulations and I think you have taken an informed decision basis mails that you have been sending us.
One must always stick to the manufacturer specified fitments and the same applies for tyres too.
One must not use an over or under specified tyres for following reasons
1) It impacts the car mileage
2) The well in which teh tyres fit are made for a specified tyre dimensions - over specified tyres might lead to higher wear and tyre and also impact the car drive-ability, smaller tyres might impact cars stability and affect the ride quality