It had occurred to me (probably when you mentioned this previously) that I could switch to a 650B wheelset on the Time Machine for winter - I don't know if you recall, but clearances with the ENVE RD fork meant I had to run a smaller tyre than I originally wanted.
I used these Jan - April this year. I'll be back on that bike and those tyres again in a week or so. They're OK. @edscoble has used the various Grand Bois options in 32, 35 and 38. Some of them may be a bit delicate.
It had occurred to me (probably when you mentioned this previously) that I could switch to a 650B wheelset on the Time Machine for winter - I don't know if you recall, but clearances with the ENVE RD fork meant I had to run a smaller tyre than I originally wanted.
What tyres were you thinking of?