The 16T mod, upgrades the stock 16mph speed to the "legal" 20mph.
With my 25.9v Li-ion, more like 22mph, with assist, past 25mph.
I jump ahead of 30mph traffic, with a 1 block headstart I can pump it up to 25mph, and travel 5 blocks before traffic nears me. Nice little cardio workout, and ... at 25mph-full throttle, power draw drops below 5 amps.
Yeah ... had to replace the oem 14-28T 7spd with a 11-30T, to increase pedal capability.7 Speed Freewheel 11-30t 11-32t 11-34t LONG YIH Co. $36
- Make Offer - "Deal" on multiple.
I tend to cruise, on the level at 20mph and have never had any heat problems, (20 miles@20mph - no pedal assist.) Oh!
... Speed-torque from 16T mod?
Doubling the speed , by going from a 20T to a 10T, speed increases to 200%, while torque decreases to 50%.
20/10 = 2 = 200% speed = 100% speed increase
10/20 = .5 = 50% torque = 50% torque decrease
Similarly ... Going from 20T to 16T ...
20/16 = 1.25 = 125% speed = 25% speed increase
16/20 = .8 = 80% torque = 20% torque decreaseImportant to note:
Due to the "torque profile" - torque steadily decreases till a top speed is reached ... At faster than 10.25mph, the 16T actually, applies more torque, to the road, than the lower geared 20T!
While at 0 mph the 16T has 80% torque of 20T, at:
2.5 mph the 16T has 85%
5 mph the 16T has 90%
7.5 mph the 16T has 95%
10 mph the 16T has 100%
In other words ...
The oem 20T freewheel would not benefit you, except accelerating to 10.25mph! ... or ... unless you take hills at less than 10.25mph!
Above 10 mph, the 16T greatly excels at torque production,
105% @ 11 mph,
110% @ 12 mph,
120% @ 13 mph,
135% @ 14 mph,
155% @ 15 mph,
200% @ 16 mph,
300% @ 17 mph!
Much beyond that, the 20T produces nothing, so comparison is not factorable.Personally, I accelerate past 10 mph, in about 2 seconds, partial throttle w/pedal assist ...