Originally Posted by
cat0020
Another reason not to use 28T rear sprocket freewheel: Ground clearance.
Below image is a 23T rear sprocket with added chain links (added weight).
Lower pulley of the rear derailleur is about 1" off the ground.
Using a larger rear sprocket would require longer chain (add more weight) to avoid the lower pulley dragging on the ground while riding.. or just go with a shorter cage rear derailleur to maximize ground clearance.
BTW, swapped out the B/B and cranks to Rival alloy/Red carbon crankarms and EXO B/B for additional weight saving.
I have a Dahon Speed p8 that is at 29lbs without the water bottle yet, but has a saddle bag with a multi tool and 3 lights, an upgraded octalink ultegra crankset, schwalbe marathon kevlar guard tires, rear rack and skx fenders. I think the fenders,racks,tires and the seatpost pump with the wtb saddle are major factors why my bike is heavier. Also I swapped out the telescopic handlepost for a 27cm fixed fnhon outside fold handlepost ( lower position). I think I can get the bike at leasts 5lbs lighter by switching out the weight factors, but them it would be a less of a commuter lol
Nice looking bike btw, thinking of getting a tokyo for international travel