Perhaps... But I had to get a new tyre when, on my 609 (with those funny old straight chainstays) I had a Blue Groove on a Rhyno Lte - the 27mm one, going to a 47mm rim. Nobbles no longer fit
On a side note - I hear that back in the day, Monty tried to make a 25" rear rim for stocks, to be like the mods. Being that it's half-way between, it might work: Is anyone on the case of a 23" rear rim for all these TGS 24"'s that are in the works?
Edit: And tyre, obviously