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Changing tire size,What would happen

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Old 08-25-13, 10:13 AM   #1
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Default Changing tire size,What would happen

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
Looking to replace with 205/50/17
Continental PureContact with EcoPlus Technology
700 A A 25.1 overall dia and 828 revs per mile
I believe speedo with 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
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Old 08-26-13, 02:50 AM   #2
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your ride quality will improve.

your fuel economy, maybe.. skinnier tyres vs. taller tyres.

your speedo will off, so will your Odo.
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Old 08-28-13, 02:21 PM   #3
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Stock tire
Sidewall 3.8 in
Radius 12.3 in
Diameter 24.6 in
Circumference 77.3 in
Revs per mile 819

New Tire
Sidewall 4.0 in
Radius 12.5 in
Diameter 25.1 in
Circumference 78.8 in
Revs per mile 804

Speedometer on new tires will read 1.8% too slow.
When the speedo says 60 mph, you will be traveling at 61.1 mph
ABS will actually increase your braking distance
Both tires weigh the same so MPG gains could be seen if driven conservatively.
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Old 02-18-15, 11:43 AM   #4
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Has anyone used 205/60R60 size in CT? Specs would be

Sidewall 4.84"
Widht 8.07 "
Diameter 25.7"
Revs/mile 785

I wonder if it fits and does anything to the ride comfort compared to stock 205/55R16.
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Old 02-18-15, 11:43 AM

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