Hi all,

I want to put some index gears on my dahon boardwalk S1 and make the bike soft to use in the city (maximun 16km/day). So I think to modify and put 3 speed gear.

1. Tyres for 20" x 1.35 or 20" x 1.25
2. What type of RIM it's good?
3. Spokes, which one is better?

What the best options?

thank you for any help