2016 Gem E4 or E6 Tires

Im looking to replace my tires on a 2016 E4. The only ones I can find are from our local dealer. They are $164.99 each and I need 4. Does anyone know where to find them cheaper?

Size is 165x70xR14

Thanks in advance!

Tire rack is my first stop for tire shopping for my cars, never tried gem tires though. Real easy website to search. Tire rack.com

I have a 2012 e4 with good tires. But they are still 7 years old and I too was thinking of replacing them. Would a larger size be ok?