Going from Prius Four, not IV because it isn't a 2010 15" wheels to 17" please help

My understanding is the 17" wheels were not put on the same cars as the solar roof to keep the weight below a certain value, to allow the best fuel economy rating. Maybe the rating system is different in Australia. Or maybe they don't care. They just want to sell -fully- equipped cars.

 

hope you got your original TPMS sensors back

I do about 40 lbs on mine and it's pretty good.

 

Pump em up to what you are comfortable with ride wise. Keep at least one to two pounds more in the front one's than the rear. Observe the maximum inflation pressure stamped on the side of the new tires. The Michelins on our Prius have a max of 51. At 51 F 50R the ride gets pretty rigid. If I drop it back a little bit, the ride gets smoother. Make it where you are comfortable, but put as much air as you can in them. More air lower the resistance to roll, whereas less air makes the tire have a higher rolling resistance...

EDIT: Don't forget to set your tire pressure's when the tires are COLD.

 

Is there a reason to lower the back ones by 2 psi than the fronts? Thanks.

 

17"s are sexy and Enzo handles quite well

I get 46-48 mpg having fun behind the wheel.

 

Weight distribution. Front is heavier. My experience with the Gen III Prius is 42/40 psi is a good balance for ride and even wear. Much more and center tread wear increases.