Joined: Jan 2010
Posts: 9,835
Likes: 1,816
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Note that the R440's and similar road-specific, flat-bar shifters will only work with Shimano's road-specific front derailers.
The cable pull is different because the actuation ratios of road and mtn front SIS derailers are different.