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  #21  
Old 3rd October 2014
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Roscoe_P_Coltrane Roscoe_P_Coltrane is offline
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Originally Posted by mrmedusa View Post
Also....on the subject...if i go to a smaller rim size on my viggen for winter 16" from 17" that WOULD throw my speedometer off a great deal...but like you said..easier to find rims and tires for the 16 than the 17. cheaper as well
going smaller will increase the speedo readings, which for some, might not be a big deal.

it might make your speedo closer to 5mph faster than actual speeds. if you've got a heavy right foot, then this might be a good way to keep mr. policeman off your tail because while you think you're doing 65 in a 55, you're actually closer to 60 in a 55.
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  #22  
Old 3rd October 2014
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Originally Posted by Roscoe_P_Coltrane View Post
going smaller will increase the speedo readings, which for some, might not be a big deal.

it might make your speedo closer to 5mph faster than actual speeds. if you've got a heavy right foot, then this might be a good way to keep mr. policeman off your tail because while you think you're doing 65 in a 55, you're actually closer to 60 in a 55.
That's why I always have my Valentine One on at all times
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  #23  
Old 4th October 2014
stevbd stevbd is offline
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Originally Posted by Roscoe_P_Coltrane View Post
going smaller will increase the speedo readings, which for some, might not be a big deal.

it might make your speedo closer to 5mph faster than actual speeds. if you've got a heavy right foot, then this might be a good way to keep mr. policeman off your tail because while you think you're doing 65 in a 55, you're actually closer to 60 in a 55.
No, usually when people go to 16" rims for winter they get a higher profile tire, usually 215/55/16. The outside diameter of the tire therefore remains the same and speedo is not affected.
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  #24  
Old 4th October 2014
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Originally Posted by stevbd View Post
The outside diameter of the tire therefore remains the same and speedo is not affected.
It's outside circumference that's not affected.

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  #25  
Old 4th October 2014
gregk gregk is offline
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It's outside circumference that's not affected.

It is both actually, since circumference=pi x diameter.
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  #26  
Old 30th November 2014
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Originally Posted by stevbd View Post
No, usually when people go to 16" rims for winter they get a higher profile tire, usually 215/55/16. The outside diameter of the tire therefore remains the same and speedo is not affected.
I believe this is correct. Because the OEM 17" rim (225/45-17) has the same circumference as the OEM 16" rim (215/55-16)...
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