Joined: Sep 2008
Posts: 1,784
Likes: 345
From: Tepic, Nayarit, Mexico
Bikes: 48 Automoto, 49 Stallard, 50 Rotrax, 62 Jack Taylor, 67 Atala, 68 Lejeune, 72-74-75 Motobecanes, 73 RIH, 71 Zieleman, 74 Raleigh, 78 Windsor, 83 Messina (Villata), 84 Brazzo (Losa), 85 Davidson, 90 Diamondback, 92 Kestrel
You're about as low as you can go as far as chainwheels are concerened, without spending a bunch of money. How about a larger freewheel? Just about any derailleur can handle a 26- or 28-tooth freewheel.