Thread: I'm downgrading my rear tires to 18 inches on 225.40.18
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Old Apr 4, 2011 | 11:52 AM
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mdaniels4
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Joined: Dec 2008
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From: Apple Valley, MN
Default Re: I'm downgrading my rear tires to 18 inches on 225.40.18
Wheels:
FWIW, if you did stock in the front, and the 245/35-19's in the rear, the sidewalls of the rear would only be .10" shorter than the front's, 3.5 compared to 3.4", and even though the overall tire would be just a tad shorter, not even noticeable, the speedo is only 1/2 MPH off. This seems to me to be a great tradeoff in pricing/vs overall value. Just wish I knew if Achilles were good overall tires. All seasons though?


Wheel 1 OEM

Wheel 2
Wheel size19x9 ET 2219x9 ET 22 BackSpace149 mm (5.8'')149 mm (5.8'')Typical Weight~ 33 lbs / 15 kg~ 33 lbs / 15 kgTires:Tire 1Tire 2Tire size255/35-19245/35-19Section width255 mm (10'')245 mm (9.6'')Sidewall89 mm (3.5'')86 mm (3.4'')Tire diameter661 mm (26'')655 mm (25.8'')

6 mm (0.9%) shorter.Rim sizes19x7.5 to 19x9.519x7.5 to 19x9Circumference2076 mm (81.7'')2057 mm (81'')Revs per mile775.4782.5

SpeedometerAssuming that this is OEM tire and speedometer readings are correct When speedometer reads 60mph (96.6km/h) actual speed will be 59.5mph (95.8km/h): 0.8% slower.Typical Weight~ 24 lbs / 11 kg~ 23 lbs / 10 kgWheel+Tire Weight~ 57 lbs / 26 kg~ 56 lbs / 25 kgClearance:Package 1Package 2SuspensionAssuming that this is OEM wheel/tire and there is no any problems with clearance on both sides 100% clear (leaves even more room than OEM) Fenders100% clear (leaves even more room than OEM)Wheelwells100% clear (leaves even more room than OEM)
 
Last edited by mdaniels4; Apr 4, 2011 at 12:00 PM.
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