Quote:
Originally Posted by TexasCotton
Okay I somewhat understand your statement and is in line with my personal perspective and thinking. Going from 185/65R15 OEM spec to 175/65R 15 and/or 175/55R 15 may be inline with that mindset. Not that I want to single other thread posters out however many make the comments of taller, larger, skinny and other relative terms that detract from the clarity to my specific application.................
fyi there are other tire calcs out there that do not require security codes......
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For your specific application, if you mean 175 wide tires by that, you clearly need a higher sidewall/threadwidth (the 2nd number in the size code), not lower.
If your OEM tires are 185/65R15 you'd need 175/70R15 or maybe 175/75R15. The first is a tiny bit less tall, the latter is slightly bigger and should yield the best FE of both.
The gains are marginal though, and 185 is a good width for a Prius. I bet OEM size comes cheaper and gives you more choice of make and type. It may not be worth it to go narrower than that on this relatively heavy car.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.2 Gigameter or 0.13 Megamile.
For confirmation go to people just like you.
For education go to people unlike yourself.