I have ridden a bunch of it a few times now and both gravel or mountain bikes work. Basically if your comfortable off-road 40c is fine. If you arent then the security of a mountain bike is probably worth the slower pace.
Recently rode a shorter version in reverse. Slightly less milage but still has all the good bits. Rode it on my karate monkey and it was great.
That me.
I have ridden a bunch of it a few times now and both gravel or mountain bikes work. Basically if your comfortable off-road 40c is fine. If you arent then the security of a mountain bike is probably worth the slower pace.
Recently rode a shorter version in reverse. Slightly less milage but still has all the good bits. Rode it on my karate monkey and it was great.
And here is the setups @Eamesy and I rode.