I've been using
this one. It's has a hose so I am less likely to break a stem, pressure gauge that can be a bit hard to read if you don't pay attention,it has a fold out foot rest that helps a lot too. It's about 14" long, about 1 1/4" wide. It comes with a bracket to attach to the frame either with two giant included zip-straps or eyelets with included bolts.