R-V
GT Fan
20" is not that big at all for a 28er. And if you have the chain a bit elongated, you just set the rear wheel a bit more backMore on the geometry. Here it is next to an 80s Nishiki 26 designed by Norco. I've aligned them at the dropouts for comparison View attachment 670939
This thing is freaking huge!
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20" seatpost, 18.5"/18.75" stays, 23" top tube