Joined: Aug 2009
Posts: 2,786
Likes: 749
From: Winslow, AR
Bikes: '83 univega gran turismo x2, '85 schwinn super le tour,'89 miyata triple cross, '91 GT tequesta, '90 yokota grizzly peak, '94 GT backwoods, '95'ish scott tampico, '98 bonty privateer, '93 mongoose crossway 625, '98 parkpre ariel, 2k'ish giant fcr3
I vote you go for the 12-30 and move to a 36t ring. A somewhat finer spread in the rear with the same low and same high as with the 39x13-32.