Hello!
i have a round trip commute of 34 miles (total). The road is mostly flat. I am looking for a fast class 3 bike that also offer offroad mode, that allows me to ride faster than 28 miles limit.
any recommendations?
thank you
Hello!
i have a round trip commute of 34 miles (total). The road is mostly flat. I am looking for a fast class 3 bike that also offer offroad mode, that allows me to ride faster than 28 miles limit.
any recommendations?
thank you
Your bike is awesomeThis is what works for me. 1000w front hub DD motor with a 52v 10.5ah shark pack, 25 amp controller with cruise control and regenerative assist braking. 20 spd drivetrain with a gear range of 28" to 154" gear ratio.
View attachment 18685
First let me say that over 28 mph efficiency drops way off due to wind resistance, even in still air. Well it starts to have affect around 23 mph actually but gets exponentially worse and you will suck up the wh/mi even on flat ground like the image shows which used almost the whole charge.
View attachment 18687
Using a drop bar bike helps cut down the wind somewhat but still handles surprisingly well on single track and all the offload situations I have used it for over the past year from sea level to 11k. The two wheel drive feature works especially well in sandy areas, even with the narrowish >40c tires on 700c i23 tubeless rims @ 35psi +/-.
View attachment 18688
Also using the proper gear ratio and a decent amount of input of your choosing will help forward momentum, and efficiency and give you as much of a workout as you desire.
Flat ground still will eat up wh's if you have to stop and start a lot. Takes a good amount of energy to get back up to speed, even with active pedaling, but it is too much fun to be half way down the block before the cars from the light start going by you. My commute is a <40 mile r/t with about 1000' total elevation change and my average speed is consistently within this range but there is usually a pretty good headwind when I come home which is what this reflects also.
View attachment 18689
Interestingly it has taken me longer to do this route in my car than by bike. Mix of 2 lane, 4 lane with big shoulder, and neighborhood stop and go for 7 miles once I hit town. Grid lock just kind of fades out of the picture on a bicycle.
Good luck on your quest. The technology is out there.
Thank you! I tried both Magnum peak and Magnum metro. i was able to get to 26m with the Peak and max to 27 miles. Metro was weak. I only can get to 23 miles with the best effort. The sale person says that Magnum has instructions online to program it to Offroad mode to get max to 30 miles. But I wasn't able to find the instruction online. I also tried Stromer S1 sports. I was able to get it to 26 miles max. I felt the Peak was better than Stromer.Thank you! I tried both Magnum peak and Magnum metro. i was able to get to 26m with the Peak and max to 27 miles. Metro was weak. I only can get to 23 miles with the best effort. The sale person says that Magnum has instructions online to program it to Offroad mode to get max to 30 miles. But I wasn't able to find the instruction online. I also tried Stromer S1 sports. I was able to get it to 26 miles max. I felt the Peak was better than Stromer.
Also, it seems the trend is towarding to central drive. Do you think a hub drive is better to maintain a maximum speed for 17 miles one way than center drive?
When I first had my 500 watt hub drive (2015 Izip Dash) I can barely pedal faster than 25 mph on max assist level. Now I only use level 2 assist most of the time, and switch to level 3 to reach to 28 mph. I rarely used the max assist (level 4).very helpful! I also tried eflow E3 Nitro 2013 model. its motor is maxed at 20m. I was able to ride at about 21-24 miles consistently, and was able to max at 26 miles with my best effort. Based on the above info, i am starting to wonder whether class 3 (max at 28m) is 20% to 30% faster than a class 2(max at 20m) for a 17 miles one way commute???
Assuming everything else is equal (tire pressure, low resistance tires, frictional drag, overall weight, pedal effort, etc...) the major factor for top speed is raw power. Raw power does not necessarily mean the power rating of the motor itself but how much energy can the battery discharge and how much current can the controller (bottle neck) allow to pass through without overheating. So the battery size, quality, health, and state of charge are very important factors. Of course, the faster you go, the more power you consume and the quicker your battery drains down.very helpful! I also tried eflow E3 Nitro 2013 model. its motor is maxed at 20m. I was able to ride at about 21-24 miles consistently, and was able to max at 26 miles with my best effort. Based on the above info, i am starting to wonder whether class 3 (max at 28m) is 20% to 30% faster than a class 2(max at 20m) for a 17 miles one way commute???
All electric motors has a bell curve of the efficiency range (albeit skewed) when plotted against RPM. That is the efficiency of converting electrical energy from the battery to mechanical energy in the motor. The peak is usually in the low to mid 80's %. A 500 watt hub drive's peak efficiency will depend on how it is wound and geared. In the US there are the 20 mph and the 28 mph hubs. The peak efficiency will be somewhere below 20 mph (15-18 mph) or for the speed pedelec it will be proportionally at higher speed, maybe from 19-26 mph.Does anyone know what percentage of electrical energy input actually gets converted into forward motion?
At, say, 500W power consumption, how much energy remains to turn the wheel as opposed to heating the motor?
I presume the conversion efficiency varies a great deal with speed and load?
Does anyone know what percentage of electrical energy input actually gets converted into forward motion?
At, say, 500W power consumption, how much energy remains to turn the wheel as opposed to heating the motor?
I presume the conversion efficiency varies a great deal with speed and load?
To put it into a more tangible perspective,Anything above 20 mph, the energy consumption rises exponentially. You consume more than twice the energy at 30 mph vs 20 mph.
Hope that helps.
The bike you are looking for and described is The M-1 Sporttechnik Brand. View attachment 18738
I have the SPitzing but the Sterling offers the same power train. I have ben just over 40mph on road.
It will climb straight up a wall if you wanted to.
http://en.m1-sporttechnik.de/das-spitzing-r-pedelec/