Joined: Jun 2012
Posts: 1,881
Likes: 188
From: Colorado
Bikes: '91 Mtn Tek Vertical, '74 Raleigh Sports, '72 Raleigh Twenty, '84 Univega Gran Turismo, '09 Surly Karate Monkey, '92 Burley Rock-n-Roll, '86 Miyata 310, '76 Raleigh Shopper
Get a Shimano UN5x or UN72, rather than a UN26. The UN26 NDS cup is plastic, not metal, and you don't want that. The plastic will eventually break down. A UN51, having a lipless NDS cup, will allow for tighter adjustment than the lipped cup of a UN55.