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Discussion Starter #1 (Edited)
Changing tire size-what happens

Currently stock tire is 215/45/17 with these specs
Michelin Primacy MXM4
500 AA A 24.7 overall dia. and 844 revs per mile
http://www.tirerack.com/tires/tires.jsp?tireMake=Michelin&tireModel=Primacy+MXM4&partnum=145VR7MXM4P&vehicleSearch=false&fromCompare1=yes&tab=Specs
Looking to replace with 205/50/17
Continental PureContact with EcoPlus Technology
700 A A 25.1 overall dia and 828 revs per mile
http://www.tirerack.com/tires/tires.jsp?tireMake=Continental&tireModel=PureContact+with+EcoPlus+Technology&sidewall=Blackwall&partnum=05VR7PURECXL&tab=Sizes
I believe speedo will be off .Will odometer be off as well ? Also what I'm hoping for is better LRR and beter fuel mileage.

Also with tire be slightly taller ride should be smoother.


Site comparing size difference
http://www.1010tires.com/Tools/Tire-Size-Calculator/215-45R17/205-50R17
 

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it throws the speedo off, so it will also throw the odo off.
yes it will be smoother
yes fuel economy will be better

BUT...

i bet you won't notice any difference at all in terms of smoothness and fuel economy.
and the speedo/odo will not be off by much at all, so i would say that won't be a big deal either.
 

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Discussion Starter #4
Its such a small diff like hdave said you wont notice a thing, curious why are you going with that particular size?
Because i would like to try the conti's out due to 700 rating and 70,000 mile warranty.Heard their rolling resistance is better.But, our stock size is not avil and the next closest is the 205/50.
 
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