To keep things simple, just match the size of your current tire. The size will be printed on the tire typically in both inches and ETRTO
eg 27.5x2.35 - 60-584 respectively
You typically can go a little thinner /wider without issue but that you should double check
From what I understand they are doing a much better job with the factory tune on the CANbus motors as of late. I'm sure the 60V of the Beasts is an asset to efficiency as well.
That said I truely appreciate the UART personalized tweaks I've made. I have as little or as much assistance as I want...
Well done!
A property tuned Ultra is very efficient imo. I average around 9Kw/mi and have achieved as low as 7Kw/mi and this is in an area with a lot of hills. And when you want a beast, it's there too with what seems to be an unlimited amount of torque.
This motor is so much fun!
Reminds me of the guy who was given a similar diagnosis by his doctor that he only had 6 months left to live.
When he didn't pay his medical bills on time... the doctor gave him another 6 months 🙃
4kmi on one Rohloff and 6kmi on another with no durability issues at all... though I did have some initial issues from improper installation by Zen.
I appreciate the tighter gear ratio of the Rohloff as I often switch one gear to stay in the perfect cadence zone without additional assistance...
Says the man with far too many accidents and multiple broken bones to the man with few and none respectively.
I'll stick to my plan, understanding my bikes limits and more importantly, my own.. especially as I age and they decline.
ymmv