Honda Car Forum |
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13 Oct 2008, 10:45 pm
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Re: Tires?
Thus spake "Reggie Dunlop" <slap@shot> :
>"Dillon Pyron" <invaliddmpyron@austin.rr.com> wrote in message >news:m0ise4567sfmp0jap5hb47plk9vb90a2nk@4ax.com.. . >> Thus spake "kevin" <powershot80@gmail.com> : >> >>>I have a 2008 honda accord. The tires size 225r-50/70. >>>I am buying winter tires. Can I put 215-r50-17? >>>thanks >>>kevin >> >> >> Yes. But why? The diameter change will affect your speedo and odo. > >I read the post as using a narrower tire (215 vs 225) rather than a smaller >diameter (17). I would think the wider tire would handle better and have >better traction-- though yield a bit less mileage. > Current tire diameter 17 inch (431.8 mm) + (225 mm * .50) = 431.8 + 112.5 = 544.3 mm Proposed 431.8 mm + (215 mm * .5) = 431.8 + 107.5 = 539.3 mm The 50 is the aspect ratio between the tire's tread width and the nominal sidewall height.     
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15 Oct 2008, 11:05 pm
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Re: Tires?
Thus spake Dillon Pyron <invaliddmpyron@austin.rr.com> :
>Thus spake "Reggie Dunlop" <slap@shot> : > >>"Dillon Pyron" <invaliddmpyron@austin.rr.com> wrote in message >>news:m0ise4567sfmp0jap5hb47plk9vb90a2nk@4ax.com. .. >>> Thus spake "kevin" <powershot80@gmail.com> : >>> >>>>I have a 2008 honda accord. The tires size 225r-50/70. >>>>I am buying winter tires. Can I put 215-r50-17? >>>>thanks >>>>kevin >>> >>> >>> Yes. But why? The diameter change will affect your speedo and odo. >> >>I read the post as using a narrower tire (215 vs 225) rather than a smaller >>diameter (17). I would think the wider tire would handle better and have >>better traction-- though yield a bit less mileage. >> > > >Current tire diameter 17 inch (431.8 mm) + (225 mm * .50) = 431.8 + >112.5 = 544.3 mm > >Proposed 431.8 mm + (215 mm * .5) = 431.8 + 107.5 = 539.3 mm > >The 50 is the aspect ratio between the tire's tread width and the >nominal sidewall height. Minor correction: Formula is wheel diameter in mm (inches * 25.4) divided by two, plus sidewall height. This gives you rolling radius.
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