How to "Shunt MOD" your Bosch Gen4 for 70+ km/h and 729+ Watts

AndyBike

Esteemed Pedelecer
Nov 8, 2020
1,429
618
So how long does the battery last then ? ten minutes lol.
 
  • Like
Reactions: flecc

soundwave

Esteemed Pedelecer
May 23, 2015
16,998
6,536
i can get about 25 miles with a dongle flat out
 

soundwave

Esteemed Pedelecer
May 23, 2015
16,998
6,536

WheezyRider

Esteemed Pedelecer
Apr 20, 2020
1,690
938
+120rpm at the ranks you can but fastest i got is 39.6mph :confused:
To do over 40 mph, you need around double 730W, so getting on for 1500W, and that's if you are on a racing bike on the drops in a good aero position, with no head wind and no gradient. For a mountain bike with wide tyres and an upright position, you'd need a lot more than 1500W.

Maybe if you are also putting in a lot of effort, but you'd need high gearing and wouldn't be able to maintain it for long.

Downhill you might be able to go faster. But once the motor reaches it's max speed, if there isn't an increase in voltage, it won't go any faster, even if the power is available, it will be down to you and gravity to make you go faster :)



 

soundwave

Esteemed Pedelecer
May 23, 2015
16,998
6,536
on the bosch app at full rpm 500w is from my legs :oops:

i use high power energy drinks :p

50755
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
20,981
8,565
61
West Sx RH
Downhill momentum,weight and gravity with some hard pedalling will see one hit 50mph.
 

AGS

Esteemed Pedelecer
Feb 12, 2023
608
190
Freewheeling down the Wicklow gap will get you there easily. Getting to the top in the first place is another matter.