I need to pull the trigger on a vehicle really soon and I'm leaning toward the Prius c. I really want non-cloth (factory) seats so I'm considering the c4. What's really got me stumped is the 15" vs. 16" wheel choice. Ride quality aside, its basically a tradeoff between turning radius and handling. I've struggled to rationalize it different ways - even "had my way" with a 15" c4 on a test drive and it handled pretty darn good. I do about 900 mi./mos. in 70-75mph highway driving so stability is important to me and I tend to keep my vehicles a while so the decision is heavier (I enjoy driving "spiritedly" ). Regardless of the car's wheel size, I would install a strut tower brace and a rear sway bar. My current car has a turning circle of ~39' and the 16" c4's is 37' so it's a slight improvement. However, the 15" c4's 31' circle is dizzingly tight.....and refreshing. So my questions are: Availability of LRR 16" rubber? There isn't anything out there - does this concern anyone? From experience I know LRR alone will add ~+5% mileage. Opinions on future availability of rubber in this less-common size? There seems to be more variety in 15". How are people liking their c's with the 16" wheels? Any noticable mileage reductions from these (and non-LRR) tires? Anyone care to give a detailed review of their likes/dislikes of the 16" option?? I know there is the option of new wheels and using, say, 185/65R15's but I'd rather not go through that right now - this decision is between 15" & 16". If Toyota didn't actually change the steering rack to fit 16's on the c, it would be an easy decision, darnnit. Thanks.