I have a 1996 dual axle Gambler trailer with 205 75 r14 tires on there now- any issues if I move up to a 215 75 R14 ? The 215 is a little taller, will I get worse gas mileage or any concerns with the taller tire? Class C or class D advised? -My boat is a 209TE with mercury Promax 225 and the trailer I have is the original.