The motor uses the 3 gears of the sram via a single external gear reduction and
the rider also uses the 3 gears of the sram via the traditional bicycle external
gear reduction.
The bike was never the problem, only the rider. LOL
Robbie
--- In power-assist@yahoogroups.com, "jmygann" <jmygann@...> wrote:
>
> Not just a randy ..(planet ryder) motor , but the use of 3 gears for a
motor...
>
> http://tinyurl.com/kokjrj
>
> is what I am after as the most efficient drive train .....
>
>
>
>
> --- In power-assist@yahoogroups.com, "jmygann" <jmygann@> wrote:
> >
> > In the randy bicycle, does the motor use the 3 speeds of the sram ?
> >
>
Not just a randy ..(planet ryder) motor , but the use of 3 gears for a motor... http://tinyurl.com/kokjrj is what I am after as the most efficient drive...
The motor uses the 3 gears of the sram via a single external gear reduction and the rider also uses the 3 gears of the sram via the traditional bicycle...
(Sram Dual Drive 3 speed hub) in common with the motor, pedals and derailer gears, on a separate freewheel http://www.solarnavigator.net/electric_cycles.htm...
I thought the SRAM DD was a better hub ??? but I did find a special SA for a wide rim ..... http://tinyurl.com/l7autx Need a strong axle , spokes , and rim to...
The recent trend in the electric bike industry is toward the much more convenient and efficient hub motors, so we will disregard all side mounted motors and...
This guy is definitely NOT Draper.. LOL Much more convenient? yes! More efficient? Doubtful! Assuming something is better because it's *trendy* is absurd! It's...
A hub motor will never be as efficient as a "through the gears" motor until you can buy one that has just as many gear ratios available as the through the...
... For the above to be true, the rider has to have an ammeter and the understanding of what conditions the motor requires for most efficient operation....
An ammeter or watt meter along with a meter that adds up how much you've used should be standard equipment on ebikes. One way to avoid lugging the motor in a...
I use the Astroflight meters because they're cheaper and do what I want. Astroflight has been good about replacing faulty stuff too. Don't get them wet though....
... Or a Watt's Up meter, a bike speedometer and either a calculator, a pencil and paper, or someone who can divide in his head. I had a geared hub motor that...
Agree totally, and is kind of what I was saying in one of my other posts. When this matching is done properly, the small extra efficiency derived from a...
But in all fairness, like Randy *okay, kidcalif or whatever* just said, adding a derailer on the pedaling side of the equation to his 3 speed sram would make...
... That's like saying a tach should standard equipment on a car. It's a plus, but it only matters if you know what it means and care one way or the other. A...
... I tried that and I didn't like it. It is much better to disconnect the pedals from the motor imo. For someone who wants to ride around without pedaling a...
... That's clearly not true in any general sense. An assist biker can go faster than a typical sport cyclist, but not for long unless his bike amounts to a...
... Range is a problem with current battery technology but I am planning to go 100 miles with over 8000 feet of climbing at the end of this month, I would...
170 miles in one day for a non-power assist human powered bike is actually quite good. I did 135 miles in a 10 hour period in 1970 and next morning I was...
My wife and I did Montpelier to Rutland, 100 miles, over Killington Pass, on a tandem with 35 pound load in a single day. The next day we we're sweating...
In my case that 135 miles was supposed to be Day One of a bike ride to the tip of South America, back up to Aspen Co and NW to Vancouver B.C.. Was supposed to...
Goes to show what too much of a good thing will do. Sent from my Verizon Wireless BlackBerry ... From: "EVsolutions" <evsolutions@...> Date: Sun, 12 Jul...
For Colin (his name was Colin) the trek down through South America was his Mount Everest. Had to get it done, had to rid it from his To Do List and once...
... My 170 mile day was a backroads loop from Canton, Maine to Portland and back. Terrain was gently rolling and weather conditions were ideal. It took me...
... Somewhere in that general ride profile you'll cross a boundary where the presence of the e-drive makes you put in more extra watt-hours at the pedals than...
Most people that will buy a ebike will be happy with a 25 mile range using a small 2 1/2 lb battery. A athlete riding 20 lb bike equipped with a 5 lb motor and...
... Where in the world are you getting this correlation of range and battery weight? Don't tell me-- this is for your secret bike with the 900% efficient...
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