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put my general grabber on about a month ago, maybe a little longer not much, anyway lately when i need to fuel i just go and fill it up i didnt wait till i hit reserve like i normally do....lastnite my brother and i went for a cruise, i was getting close to the 145 miles on my tamk so im waiting for it to sputter i hit 150 nothin 160 nothin 170 she starts to sputter. i have never got 170 miles before i hit reserve it was always between 145-150.the only thing i have done was put my grabber on......anyway im not complaining, just another benefit for going dark:mosh: im goin to fill it up today, ill see what i got for gas mileage.
 

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The car tire itself doesn't improve gas mileage over a motorcycle tire, probably most of what you are seeing is the difference in tire height changing your odometer accuracy and thus changing how many indicated miles you can ride before you hit reserve.
There is a very tiny change in effective rear drive (higher or numerically lower) ratio with your change in tire height (about 3/4 inch) which would theoretically improve your gas mileage, but based on an decrease of only about 25 tire revolutions per mile between the 205/70/15 Grabber and the stock Dunlop it would only be in the neighborhood of adding 4 or 5 miles to your tanks range.
 

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Would the Speedo actually be affected by the tire change? I know you are going further with the new tire, it is bigger, and yes a bit closer on the actual speed, but to the speedo, a rev of the tire is just a rev of the tire.
Seems to me that you would still get about the same "Number" on the speedo, just travel a little bit further?:confused: In burning up the fuel it would still be 145-150 on the speedo yet you would now travel a bit further than before, which in turn would be a bit better milage on the tank. ???
 

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Would the Speedo actually be affected by the tire change? I know you are going further with the new tire, it is bigger, and yes a bit closer on the actual speed, but to the speedo, a rev of the tire is just a rev of the tire.
Seems to me that you would still get about the same "Number" on the speedo, just travel a little bit further?:confused:
The speedometer has no clue how tall the rear tire is, and the sensor for it is at the trans output shaft..But the taller tire still affects the speed, making our bikes a little closer to correct...Kinda hard to explain, but it doesn't change the speedo readout, just your actual speed...
 

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Bassdude,
yes, i think i was trying to say that same thing. You just stated it better than i did.

Uncle,

BTW, i love my Grabber!!

Randy
 

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I'm NOT darkside. I've hit 170 miles before sputtering once. Never did figure out how it happened. Never happened again. Normally it sputters around 140-145.
 
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