Fastest Ebike with offroad mode

[Geoffrey Bloom]

Could be, depending on model and how you spec it out (Sterzing starts at about $7500). It is state-of-the-art Carbon frame, dual piston, brakes, etc etc.

http://www.motostrano.com/M1-Sterzing-GT-E-Bike-S-Pedalec-p/sterz.htm

But if you are looking for the best value / performance ratio out there, it is the Magnum peak for sure. It has the basic essentials like 48v battery / power and 90nm of torque, hydraulic brakes, 24 gears, 29" wheels - all for about $2000.

https://www.magnumbikes.com/product/magnum-peak/

 

[Ken M]

Has anyone confirmed that the Magnum Peak has 90nm of torque? It really does appear to be a value priced, good quality speed pedelec. I could not find a DAS-KIT motor on their website that produced 90nm (most of their geared hub motors we in the neighbor hood of 40nm which will still perform pretty well but not achieve 28mph with some reasonable rider effort.

 

[Ken M]

I commute year round by ebike and over time the battery isn't going hold the charge as well. From my experience, I wouldn't go below 13.6 ah for that commute. After two years and a few hundred charges, the range is going to drop a quite a bit and you also want to take into account the drop in range in the winter months.

There are a few models that utilize Li Iron Phosphate (my Polaris does) and they seem to have minimum temperature sensitivity and charge cycles are like 2 X other Li Ion batteries. They are heavier / somewhat lower power density but the trade-off makes sense for eBikes and eScooter in my opinion.

 

[Ken M]

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.

http://www.ebikes.ca/tools/simulator.html
When it comes to the load. The new controllers now use MOSFETS that feed optimum load all the time for maximum efficiency (gone are the inefficient variable resistors of the past), but the optimum current is produced in pulses and the pulses are controlled or modulated by there width, pulse width modulation or PWM. So the load is always near optimum with the new controllers.

Small mid drives has the potential to have the highest overall efficiency by taking advantage of the gear ratios and keeping the RPM within the optimum range.

 

[Ken M]

Obviously mid drive motors do have an efficiency and even a performance advantage at lower speeds when the rear chain ring is close to the same size as the front chain ring. While their efficiency may even improve as bike speed increases the gear ratio effectively wipes out that efficiency. Bosch mid drives (and maybe some other brands) have small front chain rings that spin at 2.5-3 X the cadence of the rider which is very effective overcoming the chain ring ratio problem with possibly some performance loss of slow speed climbing.

I believe that rear hub motor efficiency approach mid drive motors at higher speeds so that has to also be considered. Without using planetary gears someone needs to find a way to produce a hub motor with high Kv and Kt and they typically require design trade-offs that rob from one to improve the other.

 

[Rooster]

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

Get you a good bike that you like and get a kit with at least a 1000 watt direct drive motor and buy the biggest 52 v battery you can afford, at least 17 ah. That way you can baby it and still get there pretty quick. That's the cheapest way to go, other wise buy the juiced, it's the best deal going IMO.

 

[Geoffrey Bloom]

Has anyone confirmed that the Magnum Peak has 90nm of torque? It really does appear to be a value priced, good quality speed pedelec. I could not find a DAS-KIT motor on their website that produced 90nm (most of their geared hub motors we in the neighbor hood of 40nm which will still perform pretty well but not achieve 28mph with some reasonable rider effort.

Yes, I have a Magnum Peak and it is definitely at least 90nm. It takes off the line quickly. My friend with his Specialized Turbo Levo (also 90nm but only 36v) can not even come close to keeping up with me. And I have achieved and sustained speeds of 28mph.

 

[WilliamT]

For under $2k, you can get this kit to add to your bike. Cruising speed is 45 mph

(Link Removed - No Longer Exists)

you can also do a custom kit to drop the rack and battery bag.

 

[Trail Cruiser]

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

If you ride like Tora (the company owner and designer of the CrossCurrent S ebike himself) on this video where he easily maintained 29-30 mph on some sections of the 16 mile trip and consumed 8.5 ah for the ride, then your 34 mile round trip will consume roughly 18 ah. That's barely enough for the 17 ah battery but you will have more than enough charge if you use the 21 ah battery. That's assuming your battery consumption is same from Tora's ride at 25.5 wh/mi (1.88 ah/mi).

Interestingly, as a side note, when Ravi did his Guinness 5K run with the Stromer ST2, he averaged 22 mph and consumed about 18 wh/mi. That coincides with Juicebikes' tabulated consumption at the indicated speed (highlighted in green). That only shows that the CCS is very close in performance and efficiency to the Stromer ST2. CCS is a great product by Tora considering that it is a fraction of the price.

 

[Rooster]

To be a class III, you can't have a throttle and is limited to 28mph. Any class III is able to be taken over 28mph if you pedal faster. Maybe you don't want a bicycle?

I believe you can have a throttle on class 3 but throttle is limited to 20 mph and assist is 28.

 

[JRA]

The torque sensing PAS system on the bike I have works well while underway but not that well from a stop, especially if you are on an incline. Having a throttle handy to give a little blip to get you started and activating the PAS right away works much better.

I really still don't see the hate for throttles. They are quite useful and do not necessarily preclude active pedaling.

 

[Rooster]

The torque sensing PAS system on the bike I have works well while underway but not that well from a stop, especially if you are on an incline. Having a throttle handy to give a little blip to get you started and activating the PAS right away works much better.

I really still don't see the hate for throttles. They are quite useful and do not necessarily preclude active pedaling.

I agree 100%, super nice to have in many situations but just because you have it doesn't mean you have to use it. Too many people think it takes away from being a bicycle but that's b.s.