Mon Apr 21 2008

gear/speedo delta:
	have 235/75r15 now, getting 31x10.5...
28.9"/30.6" = 0.94444 -1 = ~ 5.55% (6%) delta, 

speedometer will say, 60mph but will be going at 63.6 mph.

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tire info:

http://www.yokohama.co.nz/geolandar_ats.html

Size 31X10.5SR15
Load Index 109 = 2271lbs (1030kg) per tire
Speed Rating .S. = 112mph (180kph) 109S  C 	
Max Load 	2270 lbs.
Max.  Inflation Press. 	50 psi
Tread Depth 	17/32"
Tire Weight 	44 lbs. 	
Rim Width 7-9"
Meas.  Rim Width 	8.5"
Sect.  Width 	10.7"
Tread Width 	8.3"
Overall Diam. 	30.6"
Revs Per Mile 680
	specs from:

http://www.tirerack.com/tires/Spec.jsp?make=Yokohama&model=Geolandar+A%2FT-S&tirePageLocQty=

http://www.tirerack.com/tires/tires.jsp?tireMake=Yokohama&tireModel=Geolandar+A%2FT-S#Survev

Averages  	 14  	 89%  	 7.7  	8.4  	8.4  	7.9  	8.8  	8.0  	8.4  	7.8  	6.8  	8.0  	7.4  	7.6  	15,524,638

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http://www.tirerack.com/tires/tires.jsp?tireMake=Michelin&tireModel=LTX+A%2FT

Averages  	 10  	 91%  	 8.4  	7.9  	7.9  	8.0  	8.8  	8.2  	8.1  	7.9  	7.3  	8.3  	8.0  	9.1  	20,403,262

235/75SR15
Load Index 108 = 2205lbs (1000kg) per tire
Speed Rating .S. = 112mph (180kph) 108S  XL 	 Treadwear: 500
Traction: A
Temperature: B500 A B
	2183 lbs.
	50 psi
	14/32"
	34 lbs. 	6-8"
	6.5"
	9.3"
	NA
	28.9"
	721

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