veganbikes

I would check with Giant and see if they have a max chainring or check with the motor manufacturer (Yamaha more than likely) and confirm with them aside from spacing issues what is the max chaining you could run on their system. Then go back to Giant and see what the max size you can fit on the bike and what the Bolt Circle Diameter is.

You could also consider using less assist instead of grinding in a tiny cog at the back in full power all the time consider using all of your gears and less power. A lot of people like to use their assist as the gearing and their gears as extra dead weight and that can really burn up the system and waste a lot of money replacing barely worn cassettes with single damaged cogs due to people not understanding the bike is a bike that also happens to be able to assist you but is a bike first and foremost.

If I am on a flat road or downhill I am not going to be in my highest setting generally because the motor is just going to give more power than I need and I will just spin real fast and not put much down.