For those of us that train outdoors, you need to carry a few tools and spares. Ignoring those nerds with storage containers built into their bike (my precious frameset weight), and people who put it in a bidon (you don’t ride enough), or their back pockets (you’ve never crashed).
At the least, it needs to carry; 1-2 TPU tubes, 1-2 CO2’s and a chuck (or a battery inflater), two levers, spare tubeless plugs, a chainlink and a tool, and you need it to not be the end of your day if you need something from it in, for example, a Gran Fondo (aka no fighting with a tool roll to get it squished down whilst the group disappears up the road).
I’ve been using the Silca Assymetrico for a while. It’s great, but it is not quick to take on and off and it is not even beginning to be water resistant. It’s also 85g which is positively a boat anchor.
What’s the lightest, most secure, tucked behind saddle solution? What would Dylan Johnson use? (not a saddle bag obv, he uses a top tube bag).
Racelite Zip Saddle Bag – Lead Out Gear at 82g?
Mattone Seat Pack – SILCA at 87g?
Road cycling & gravel saddle bag - waterproof - Fizik at 62g?
Lezyne Road Caddy | Compact Bicycle Saddle Bag at 72g
FWIW I’m in Europe, so US-only affairs are harder to get.
The best I can seem to find is:
ELEMENTA SEATBAG | Topeak at 45g?
Which is water resistant, half the weight of the competition, you can open it and get stuff out without removing it from the bike AND it holds the CO2’s externally so you can grab them as fast as if you taped them to your bike. It’s also well cheap.