Stromer ST3 - report about test on the long run

[bluecat]

So if they only modified ST2S so that it would fit 27.5" wheels wouldn't it be a better bicycle?

They did, see in the ST5 reports.

I would expect a pinion + belt

Stromer goes in direction sport e-bike. The slow switching Pinion and the the high tension (which disturbs the TMM4) of the Gates Belt might come on a Stromer, when they decide to build a slow bike. See first reports about the Wren USD fork, maybe the first fork for 45 km/e road-e-bikes ever, on stromerforum.ch

 

[Johnny]

They did, see in the ST5 reports.



Stromer goes in direction sport e-bike. The slow switching Pinion and the the high tension (which disturbs the TMM4) of the Gates Belt might come on a Stromer, when they decide to build a slow bike. See first reports about the Wren USD fork, maybe the first fork for 45 km/e road-e-bikes ever, on stromerforum.ch

Thanks for the info. I don't see why a quality inverted suspension fork wouldn't work or work any different than the "28mph" specific fork. Those forks are designed for downhill where it is a high speed + very high impact condition.

Also if the tmm4 torque sensor is the problem why not use a bottom bracket sensor? Of course they can design a better internally geared setup for their bike can't they? Especially given the price?

 

[bluecat]

a) I don't see why a quality inverted suspension fork wouldn't work or work any different than the "28mph" specific fork. Those forks are designed for downhill where it is a high speed + very high impact condition.

b) why not use a bottom bracket sensor?

c) Of course they can design a better internally geared setup for their bike can't they?

a) You've already given the answer, it's the huge travel length of such forks. Let me show it: You ride your Stromer, a sport bike, with sport setup (=saddle higher than handlebar) Stromer speed (=45km/h). Emergency braking! A dynamic change of weight happens. The rear wheel has only limited contact, yourself feel light in the saddle, all weight on the front wheel. Now the same with a high end downhill fork. With all the load, the fork will dive, you will be lifted out of the saddle - and have a free flight over the handlebar.

b) At this place, a sensor is useless, as he only can register of pedaling or not. The sensor has to be in or at the axle.

c) They will not. It's a small company and after ten years, they made the turnaround (due to strict cost control).