DrkAngel
1 GW
Prologue:
For the most part, I intend these upgrades as being designed to meet the USA "legal" 20mph speed.
Most members wonder at my eZip fixation.
I admit ... the oem eZip is a cheap, heavy, lackluster eBike , but ...
It is so simple to upgrade-enhance. Different inexpensive mods greatly enhance its capabilities.
But , for now, I just wanted to consolidate the re-gearing mods (did not list the lower gearing)
More speeed!
OEM
The eZips, Trailz etc., have an oem 15-16mph capability, with some slight assist to ~18mph.
eZip 22T Freewheel Mod
Replacing the oem 20T freewheel with a 22T freewheel.
To lower speed for more torque, hills, heavy load etc.
Limits speed to < 20mph when combined with 33.3V battery.
Designed for heavier loads and hilly territory.
16T ACS Southpaw Mod - $20
Simply replacing the oem 20T motor side freewheel with an ACS SouthPaw 16T.
This increases speed to ~20mph, a 25% increase.
Torque is reduced 20% at 0mph, but loss decreases till torque actually increases at above 10mph!
Also, much more efficient! reduces motor drag during pedal only!
11T Motor Sprocket Mod - $18
The ideal eZip upgrade!
Simply loosen, replace 9t with 11T, re-adjust - tighten chain = nearly 20mph ("legal) limit.
12T Motor Sprocket Mod - $24
A "simple" re-gearing.
Merely replace the oem 9T motor sprocket with the 12T.
This will give you a 33.3% speed increase.
A reasonable expectation of 20mph - motor only.
With some assist to 24mph.
13T Motor Sprocket Mod - $18
Plug-n-Play! Good fit, good alignment ... just build longer chain.
My 22.2V 41.6Ah prototype might push to 20mph with the 13T alone!
15T Motor Sprocket Mod - $12
A "simple" re-gearing.
Merely replace the oem 9T motor sprocket with the 15T.
This will give you a 66.7% speed increase.
A substantial assist of 25mph - motor only? ... possibly.
With some assist to ~30mph.
Re-gearing mods might require differing length chain!
9T - 22T requires 15 - 2T links (22T mod) near max adjustment - encourages replacement when chain stretches-wears
9T - 20T requires 14 - 2T links (OEM)
9T - 16T requires 13 - 2T links (16T mod)
11T - 20T requires 14- 2T links (OEM)
13T - 20T requires 15 - 2T links (13T mod)
(16T combined with 13T might use OEM chain?)
See also - Re-volting the eZips - Simple Mods!
For the most part, I intend these upgrades as being designed to meet the USA "legal" 20mph speed.
Most members wonder at my eZip fixation.
I admit ... the oem eZip is a cheap, heavy, lackluster eBike , but ...
It is so simple to upgrade-enhance. Different inexpensive mods greatly enhance its capabilities.
But , for now, I just wanted to consolidate the re-gearing mods (did not list the lower gearing)
More speeed!
OEM
The eZips, Trailz etc., have an oem 15-16mph capability, with some slight assist to ~18mph.
eZip 22T Freewheel Mod
Replacing the oem 20T freewheel with a 22T freewheel.
To lower speed for more torque, hills, heavy load etc.
Limits speed to < 20mph when combined with 33.3V battery.
Designed for heavier loads and hilly territory.
16T ACS Southpaw Mod - $20
Simply replacing the oem 20T motor side freewheel with an ACS SouthPaw 16T.
This increases speed to ~20mph, a 25% increase.
Torque is reduced 20% at 0mph, but loss decreases till torque actually increases at above 10mph!
Also, much more efficient! reduces motor drag during pedal only!
11T Motor Sprocket Mod - $18
The ideal eZip upgrade!
Simply loosen, replace 9t with 11T, re-adjust - tighten chain = nearly 20mph ("legal) limit.
12T Motor Sprocket Mod - $24
A "simple" re-gearing.
Merely replace the oem 9T motor sprocket with the 12T.
This will give you a 33.3% speed increase.
A reasonable expectation of 20mph - motor only.
With some assist to 24mph.
13T Motor Sprocket Mod - $18
Plug-n-Play! Good fit, good alignment ... just build longer chain.
My 22.2V 41.6Ah prototype might push to 20mph with the 13T alone!
15T Motor Sprocket Mod - $12
A "simple" re-gearing.
Merely replace the oem 9T motor sprocket with the 15T.
This will give you a 66.7% speed increase.
A substantial assist of 25mph - motor only? ... possibly.
With some assist to ~30mph.
Re-gearing mods might require differing length chain!
9T - 22T requires 15 - 2T links (22T mod) near max adjustment - encourages replacement when chain stretches-wears
9T - 20T requires 14 - 2T links (OEM)
9T - 16T requires 13 - 2T links (16T mod)
11T - 20T requires 14- 2T links (OEM)
13T - 20T requires 15 - 2T links (13T mod)
(16T combined with 13T might use OEM chain?)
See also - Re-volting the eZips - Simple Mods!