Originally Posted by
20grit
I think the reason for the 24" wheel and 700c wheel pair is that the 700c wheel still allows for road gearing to apply as it should. If the same gears were pushing a 24" wheel you obviously wouldn't travel the same distance with each revolution.
That's the reason that caused Bill Boston to develop this design back in the 1970s, but then he was working with 14T small freewheel cogs. Today you can get cassette cogs down to 9T and Terry just continues the old design as a marketing affectation. Apparently Terry customers don't mind carrying two different sized tubes, and on tour, tires.
tcs