SunTrip questions

I have seen the suntrip from 2018.
Now i want know do the participants need to apply them self before the race starts the visa's for the country they are crossing or does it the suntrip administrators ?

Also i want know since the country they are crossing have different ebike pedelec laws or even no laws. Do they need some kind of controller profiles for every country ?
What is the maximum allowed motor power rating allowed to use in the race ? (finland alows 1000w austria 500w and rest of EU only 250w)

I don't know if this helps out at all
https://www.thesuntrip.com/contact/

https://www.facebook.com/groups/407404366348389/

Actually it helped a lot.


I found here the https://www.thesuntrip.com/wp-content/uploads/2019/02/Technical-Regulations-ST20.pdf
for the 2020 race to china.
Limits are
1155wh battery
<2,50 m² installed solar and 1,50 m² portable solar.
No charger
No night driving
The chosen engine should not have the capacity to assist the cycle beyond 45 km/h by design.
No words on motor power rating.
When i compair the 3k mxus with all other 1kw motors. They are all 2-3% less efficient.


For the visa question i might write email to them if here no one knows.

If there's no info in any of the existing suntrip / sun trip threads about that, contacting them is your best option.


Regarding motors, I'd check what others used. If you want hubmotors for reliability / simplicity, the leaf hubmotors are probably your best bet for efficiency, and matching the winding and voltage with your wheelsize to get teh best power curve match for most of the terrain.

However...a middrive would let you change gearing for hills and mountains and stay even more efficient, and even go up stuff you simply could not do with a hubmotor without using so much power your range could drop to nothing more than just that slope for the day.

You'd want direct drive for the regen capability, or somehow fabricate a geared motor to lock and regen.

markz said:

You'd want direct drive for the regen capability, or somehow fabricate a geared motor to lock and regen.

Click to expand...

Or a competent mid-drive for primary propulsion, and a very small (~250W) front hub for regen and assist. You could even choose which motor to use based on what the winds/slope/max speed were.