V2.2
2022 RUNGU Dualie Rugged/XR series
Copyright 2021 Standard Bearer Machines, LLC
78
As noted, you can also set the number of power levels to be three or nine. Here are the power output
tables for these levels.
If you purchased your Dualie configured as a Class 1 or Class 2 e-
bike, you’ll find
the output to be half
what is displayed above.
Power level and gear combination guidelines
For best results and the longest life of your chain and cassette follow these guidelines:
1.
ON EVEN OR ROLLING ROADS, Use power level 3 (60%) and pedal. Change gears at will to
manage speed. Avoid power levels 4 (80%) and 5 (100%) when using 8
th
or 9
th
gear. The force of
acceleration at high power levels on these small cassette sprockets leads to premature wear.
2.
ON STEEP HILLS (greater than 20% grade), stay in first or second gear and leave the power level
set to 5 (100%). Avoid changing gears. Changing gears under load may cause the chain to break
or the sprockets in the cassette to bend. If you plan to ride off-road and encounter steep terrain,
it is advisable to bring a spare chain and a master link chain tool.
ON LOOSE GROUND LIKE DEEP SNOW OR SOFT SAND, use power levels 3-5 and low tire pressures (as
discussed above), always start in first or second gear before changing gears to get a higher speed. As
with steep hills, changing gears under load may cause the chain to break or the sprockets in the cassette
to bend.
The Importance of Shifting into the Correct Gear
Appropriate gearing takes full advantage at each power level. Using the shifter on the right handlebar,
you can change the Dualie gearing. Dualie has nine gear ratios or speeds. The largest gear ratio for the
BOX Prime 9 cassette is 30:12. At a ratio of 30:12, every rotation of the crank arms turns the rear wheel
2.5 times, which is good for maintaining higher speeds. However, the torque output is around 1/3
rd
of
the motor output so accelerating from a stop and hill climbing using this gear ratio is a bad idea. In the
lowest gear (largest cog), the gear ratio for the BOX Prime 9 cassette is 30:50. For every rotation of the
crank arms, the rear wheel turns 60% of a full rotation; not so good for maintaining higher speeds, but
great for getting the most torque out of the motor for hill climbs and on soft ground (snow, sand and
Power
Level
%
Maximum
Power
Maximum
output
power (W)
Maximum
Power (hp)
0
0
0
0
1
33%
476
0.6
2
67%
953
1.3
3
100%
1,429
1.9
Power
Level
% Maximum
Power
Maximum
output
power
(W)
Maximum
Power (hp)
0
0
0
0
1
11%
159
0.2
2
22%
318
0.4
3
33%
476
0.6
4
44%
635
0.9
5
56%
794
1.1
6
67%
953
1.3
7
78%
1,112
1.5
8
89%
1,270
1.7
9
100%
1,429
1.9
