Tim, I run 38mm Barlow's Pass with longboards and for the sake of fender coverage, I wouldn't go wider. Fenders do their job best with some extra width. P50s would be a better match for a tire beyond 38mm.
Regarding the max with no fenders, I wouldn't go beyond 45mm. I ran Smart Sams last summer and it was a tight fit. All my experience is with 700cc tires, so ymmv. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.