Now that the weather is nice I don't really need the large bag anymore. But when the weather is cold or funky, or funkitude is threatening, it's nice to have a place to stash the jacket, tights, and other cool-weather stuff as the day warms up or vice versa. Or to stash other people's stuff for them.

Still, the bag really comes in handy when I stop to buy lunch or Ho-Hos and want to take it someplace else to eat. Or to stash important purchases, like Jelly Bellys.

I don't like carrying things wadded up in the back pocket of my jersey, and I don't like camelbacks, so the seatbag is a good option for me.

Plus the stylin' Carradice canvas bags appeal to my retro-grouch aesthetic. Trouble is, they are heavier than other bags. But that doesn't really matter all that much to me, since there is pretty much nothing one would consider aerodynamic on either of my bikes

I might switch to my smaller Carradice "roll" bag (it's a handlebar bag which can also be used as a saddlebag) on Dusty for the summer, if I can figure out a good way to mount my toepeak morph pump on the frame. At the moment the pump fits nicely in the larger Barley bag.