There’s a few “standard spec” tires out there on the KH26. Original spec was the Stout 26x2.3, which is still in stock in a few places. Then the Ardent 26x2.6. This has become essentially unavailable so will be re-spec’d again in future (note that there’s some differences in what’s available in Taiwan versus what you’ll find in a retail environment). Some importers of the KH26 have also been importing KH components and assembling them locally, so you’ll see some local varations on what tire is offered with the KH26. I’m currently running a Maxxis High Roller 26x2.5 and am really liking it. But ultimately I think there’s some big differences in what’s “best” depending on your body size, riding style, skill level, and priorities.
Kris