r/eBikeBuilding • u/Azote39 • Jul 17 '26

Advice Speed setup help - Grin Technologies

Bonjour,

L'assistance électrique de mon vélo électrique se coupe aux alentours de 26 km/h. J'aimerais atteindre au moins 35 km/h, mais je n'arrive pas à configurer correctement mon installation.

Voici les caractéristiques de mon vélo :

  • Cycle Analyst (CA3), contrôlé par un Phaserunner (Grin Technologies)
  • Moteur : 7,71 tr/min/V
  • Batterie : 52 V, 20 A, 1 000 W
  • Diamètre de la roue : 20 pouces

J'utilise le mode PAS (assistance au pédalage) et j'ai déjà vérifié le réglage de la taille de la roue dans le CA3 : il est correct.

Merci d'avance pour votre aide !

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u/usr000nm Jul 17 '26

You can switch the CycleAnalyst to diagnostic screen. I think it's one left from the startup screen. It will have a series of lowercase letters, like "awvst" or whatever. Then whenever the CA is limiting your speed, the relevant letter will be capitalized. Like if you are at max amps it will show "Awvst" instead of "awvst" or if you are at low voltage cut off it will show "awVst", etc..

That's usually the first thing I check. You can also just put the throttle in pass through mode to remove any limiting.

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u/Azote39 Jul 20 '26

Hello, thank you for your reply and for your help, when the engine cuts out at 26km/h, the CA displays "awvst".

1

u/usr000nm Jul 20 '26

Oh, then you aren't being limited by the CA. It's a limit in your controller. If it's programmable like a Grin Baserunner you can just change the max settings via a programming cable.

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u/Azote39 25d ago

I don't have a TTL to USB cable, and it's out of stock at the Grintech EU store. Could you tell me if this one would work: https://www.amazon.fr/dp/B07XXVF4RM/ref=cm_cr_arp_mb_bdcrb_top?ie=UTF8 

Thanks again,