You want that, ever rode a 10 speed bike? Its way way easyer to
accelerate when you make more turns for every turn of the wheel. Hard
core drag racers run all sorts of gear. Lower the better!
Bill
On Fri, 29 Jan 1999, Jason Jennings wrote:
> So, why in the hell would they use the 3.92s on the R/T..... Cuz of the
> low profile tire???? If the shaft is turning faster than the axle, then
> darn I will never get down that stupid track....
>
>
>
> Jason
> 1/29/99 5:36 PM
>
>
>
>
> -----Original Message-----
> From: Jetmugg@aol.com [SMTP:Jetmugg@aol.com]
> Sent: Friday, January 29, 1999 4:43 PM
> To: dakota-truck@buffnet.net
> Subject: DML: Re: Tire size/ effective gear ratio.
>
>
> Okay - here goes. Smaller tires (short sidewall) is
> like putting in "deeper"
> gears. This would be like changing from 3.90's to 4.10's.
> Bigger (taller)
> tires are like putting in "taller" gears, like going from 3.90's
> to 3.55's.
>
> Sometimes the description of the gears can get
> confusing, because
> NUMERICALLY lower gears (like 3.23's) are not what we think of
> when we think
> of "lower" gears. Likewise, NUMERICALLY higher gears (like
> 4.10's) are not
> what many people would think of when someone says "higher"
> gears.
>
> We have to uderstand the relationship between driveshaft
> rpm and the distance
> that the truck travels for each driveshaft revolution in order
> to discuss the
> "effective" ratio, which includes the gear ratio and tire size.
> With 4.10's,
> the driveshaft has to turn 4.1 times for every time the axle
> turns once. With
> a 3.55 set of gears, the driveshaft has to make 3.55 revolutions
> in order for
> the axle to turn 1 revolution. Now, for the same set of 3.55's,
> if you have a
> 26" tall tire, the truck will move about 82" forward for each
> axle revolution.
> However, if you have a 30" tall tire, the truck will move
> forward
> approximately 93" for each axle revolution. In this case, going
> from 26"
> tires to 30" tires would be like installing NUMERICALLY lower
> gears, which are
> sometimes called "taller" gears. In this particular case, if
> the 3.55's and
> 26" tires were the "stock" size (which I realize they are not),
> then switching
> to the 30" tires would give an "effective" ratio of
> approximately 3.10,
> compared to the "stock" setup.
>
> I hope this helps a little, although I realize it may
> still be a bit
> confusing.
>
> Steve M.
>
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