Stark range video(s)

[DaveAusNor]

Easy to see why with some quick physics.

edit: those copy paste formulas came out with terrible formatting. basically 2 main forces, rolling resistance and drag. rolling resistance is linear but drag from wind is cubed with speed.

• 30 km/h (8.3 m/s): ≈ 0.40 kW
• 60 km/h (16.7 m/s): ≈ 1.74 kW
• 80 km/h (22.2 m/s): ≈ 3.62 kW

(Drag term scales with v3v^3v3; rolling term is linear in vvv.)

Power scales with speed³ → small increase in speed = big jump in energy use.

 

[AbnormalWrench]

Well that was to be expected. It's a high bike (still on knobby's?) with a small battery.
Since all E bikes are comparably efficiënt it's very easy to calculate how far you'll come when you have ridden one before.

The Zero is about 30% more efficient on the freeway than the Varg, so no, they are not all the same.

 

[Erwin P]

I don't have that much Freeway experience with the Stark since mine is not road legal. But did you run it on knobby's? It's also quite tall with the rider sitting up very straight.

 

[AbnormalWrench]

I don't have that much Freeway experience with the Stark since mine is not road legal. But did you run it on knobby's? It's also quite tall with the rider sitting up very straight.

I have a set or dirt rims and street rims, this was with the street tires. I was sitting straight up.

 

[brongle]

This is about 5 miles of light highway riding on street rims and 15/44 gearing, took basically exactly 10% battery.

 

[AbnormalWrench]

Off the freeway, I get around 6 to 7 miles per 10%, but it isn't uniform, it depends on the SoC. It tends to get worse the lower your SoC is. I am just comparing to the EV bike that I'm very familiar with as a baseline, which is a 2022 Zero FX that I have about 11K miles, which has a smaller battery but has a more efficient drive train. I guess most people just using it as a race bike won't care about this stuff, but I think it is interesting how it compares. Maybe others will find it interesting.

 

[Erwin P]

I guess the belt drive om the FX is more efficient?
It's also a much lower bike so a lott less wind to catch.

 

[vic321]

THE BIKE IS OVERWEIGHT STOCK
6kgs more than advertised.
End of story.

While having 50% more torque over the whole rpm band than any 450 ICE. End of story. You want to ride the bike, not carry it.