Can I change tyres to bigger size in Piaggio Vespa?

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Can I upsize tyres in Piaggio Vespa? Does Piaggio Vespa has alloy wheels? What is the size of the front and rear tyre of Piaggio Vespa bike? Which is the best battery for Piaggio Vespa bike? What are the problems with the Piaggio Vespa bike? What is the solution for starting problem in Piaggio Vespa? What is engine capacity or cc or cubic capacity or displacement of Piaggio Vespa Bike? What is the interest rate for Piaggio Vespa Bike? How much is down payment when buying Piaggio Vespa Bike? What are the special schemes for government employees or teachers or doctors and corporate discounts for buying Piaggio Vespa Bike? What are the accessories for Piaggio Vespa Bike? What is the resale value of Piaggio Vespa Bike? What is road tax of Piaggio Vespa Bike? What is the price of the front and rear tyre of Piaggio Vespa bike?