Purchased my nitro about 6 mos ago. Having trouble reaching 28mph in top gear with full pedal assist flat ground no wind. Any suggestions/comments. Should I try Red Bull?
What was your maximum cadence?Should I try Red Bull?
You could put a bigger ring (which due to the midmotor mount may not allow it) and then it is easier to do a 52x14 or 52/15 at 75-80rpm. Or even 50t ring . That is probably easier .What was your maximum cadence?
I don't want be obvious but the pedal assist bike will only run as fast as crank rotational speed multiplied by gear ratio multiplied by wheel circumference. In case of BH Evo Nitro Speed it is 48-cog chainring and 11 cogs in the cassette in the top gear. Now, the bike has 28 x 2 tires. Online cadence calculator such as this one:
tell us you need to rotate your crank at 77 RPM to reach 28 mph. Could you do that?
Honestly, I do own a very similar bike which is Specialized Turbo Vado 5.0 and I could only reach 26 mph in conditions similar to yours and was too weak to pedal at 77 RPM in the top gear...
Oh, I don't think so @Ebiker01. 52x14 requires 92 rpm, 52x15 needs 98 rpm, it takes 95 rpm with 50x14 to reach 28 mph. It is the small cog that makes the speed.You could put a bigger ring (which due to the midmotor mount may not allow it) and then it is easier to do a 52x14 or 52/15 at 75-80rpm. Or even 50t ring . That is probably easier
Actually at 28mph, with a 52/11 , it will keep pulling as is 860watts peak in that Pas level. It runs much different then the Specialized motor. It pulls nicely even at 30mph on smooth flat road with slight or no headwind. When i had the 48ring i had to pedal fast to do 28.9-29.5mph. That was 48/11.Oh, I don't think so @Ebiker01. 52x14 requires 92 rpm, 52x15 needs 98 rpm, it takes 95 rpm with 50x14 to reach 28 mph. It is the small cog that makes the speed.
The whole point of gearing is to help the rider find the sweet spot between grinding and spinning. But it is all down to the power delivered to the drive-train. The aerodynamic drag depends on speed in square power, it is the cube for the power demand. That is, reaching 28 mpg requires so and so watts of power.
Is it Nitro or Vado, regardless of the nominal motor power both deliver so and so watts in turbo mode maximum but the assistance drops gradually before reaching 28 mph and it shall be zero at 28 mph (general principle of PAS - same happens to ebikes restricted to 25 km/h or 20 mph depending on the region). So, the motor delivers a lot of power at say, 24-26 mph and pedalling is only necessary to tell the controller you want to go fast. Yet, while approaching 28 mph you have to pedal stronger and stronger to make up the decreasing power of the PAS. Not every rider can provide so much of power.
So, you either need to grind (your knees will say thank you very much) or spin but then you feel quite high resistance from the pedals and you might not be able to pedal so fast. However, even with moderate tailwind or a minor downward slope you can reach or exceed 28 mph easily, as the resistance/drag decrease.
That is why I asked @Trek69 if he could pedal at the cadence of 77 in the top gear of his Nitro because I know what top gear ratio and wheel size are in his Nitro. (He also should pump the tires to the maximum allowable pressure to reduce the rolling resistance, mine are by 7 psi less than allowed).
What is the reputation of DAPU motors? I ask because Czech manufacturer Lovelec puts DAPUs in their e-MTBs and the price of the bike is just $2230. Of course, these are not full suspension bikes.
Some of us are rather old, ill and these of us changed to e-bikes ;-) If I had that physical prowess, why should I use an e-bike? 24-26 mph is what I can achieve with my Vado.Like most speed pedelec ebikes, 28 mph is attainable with a rider that is of average weight and physical fitness. I would assume it would full into the category of 160-180 pounds rider and able to physically pedal 200 watts from your leg muscles, on top of the electric motor's own power.
Oh , that one is underpowered. Is only 250watts motor at 36volts. Should be 1.2-1.500$.