I think Velocity's conservative rating are more to do with minimizing/discouraging legal/warranty claims. A rim such as a Dyad ought to handle a 50mm tire. The wheel build itself has to be taken into account though, as well as air pressure.
For other rims... DT TK540 is spec'd as being suitable for 23-60mm tires. Alex DM24 for even bigger. I'll have these for my Susie. Sun Rhyno Lite. I have one wheel with these. Mavic's A319 and A719, spec'd @47mm though some European retailers note 50mm works also. I have the A719 with Big Ben's on my Bombadil and will be trying some Vittoria Terrene 2.1's. Many riders report riding them up to 2.35's. Cliffhangers -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/8ebb6ea5-fb8d-4e39-9ea1-bc7d55242fdbo%40googlegroups.com.
