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dmt257 · 10-23-2014, 01:43 PM

In a nutshell:

Honda Insight with 185/55/16 stated as 61.4 UK mpg.

Same car with 175/65/15 stated as 64.2 UK mpg.

I currently have the 16'' rims. Should I go for the 175/65/15 wheels or wider as I keep reading they will improve economy more?

Would the difference in rim and tyre size account for all of that FE difference? I assume there wouldn't need to be any changes to the CVT gearbox for example? The cars equipment spec is almost identical aside from a few items which wouldn't affect economy (wheel size excluded).

2.8 mpg sounds awesome

10-23-2014, 01:43 PM	#1 (permalink)
dmt257 EcoModding Lurker Join Date: Aug 2014 Location: England Posts: 19 2010 Insight ES-T - '10 Honda Insight ES-T 90 day: 58.04 mpg (US) Thanks: 12 Thanked 1 Time in 1 Post	Wheel and tyre confusion In a nutshell: Honda Insight with 185/55/16 stated as 61.4 UK mpg. Same car with 175/65/15 stated as 64.2 UK mpg. I currently have the 16'' rims. Should I go for the 175/65/15 wheels or wider as I keep reading they will improve economy more? Would the difference in rim and tyre size account for all of that FE difference? I assume there wouldn't need to be any changes to the CVT gearbox for example? The cars equipment spec is almost identical aside from a few items which wouldn't affect economy (wheel size excluded). 2.8 mpg sounds awesome __________________ Last edited by dmt257; 10-23-2014 at 03:19 PM..