Still satisfied with a couple of Serfas Speed Bags after a couplafew years, one small, the other expandable medium. Just typical wedge bags, two saddle straps, one seat post strap.

But the Speed Bags are better organized than any other ballistic nylon wedge bag I've seen.

• Decently roomy main pouch for tube(s), multitool, etc.
• The medium includes a zippered expandable floor for extra snacks, USB battery/cable, etc.
• There's a little pocket in the lid. I use it to hold a Lezyne glueless patch kit in a little envelope, a spare Missing Link, asthma pills for emergencies (ephedrine and guaifenesin).
• A latched hook for keys (which I rarely use).
• Inner pouch for tire wedges, zip ties and a couple of Mylar pouches of DripDrop or Propel electrolyte powders.
• Inner elastic strap for... whatever. I tuck a couple of gels there.
• Outer rear facing strap for my Cygolite Hotshots, which grip like eagle talons.
• Good quality zippers and overall material and build.
• Bright reflective strips.

Haven't found anything to complain about. The medium bag swings a bit but it's on my 30+ lb hybrid, and I often use a handlebar bag on that hybrid too, so the saddle bag weight isn't noticeable. Ditto the weight of the small Speed Bag on my 25+ lb steel road bike.

No point in my using smaller bags. I'd just end up stuffing more crap in my jersey pockets, then I'd "need" tighty cycling shorts with pockets, etc. If I can avoid it I'm not gonna call a cab or friend to bail me out 50 miles from home, so I carry whatever I might need.

But I'll probably try a rigid clamshell bag or minimalist Arundel or Lezyne bag for the carbon fiber bike, just to keep the weight down a bit and see if it makes any difference. So far the only difference I've found on the carbon bike is it's a little faster on climbs. But we don't have enough long climbs for it to matter much over a 20-50 mile ride.