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Discussion Starter #1
I install new rims and tires today. I went from a 215/65R17 to a 235/55R18 do I need to have the speedo re set for the new tires?:4-dontknow:
 

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H-D 883 IRON
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yes you will need to have the ECM adjusted for the new tire size.
 

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Discussion Starter #3
Sorry for the post I did a search and found a tire size calculator
looks like I will be off 0.4 miles @ 65. looks like the side wall of the new tire is smaller the the old tire.


from the online tire size calculator
 
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