If I had to reduce the weight of the kit as the OP posted it, I would do two things.
1 - Replace the tubes with TPU inner tubes
2 - Replace the spanner with one of these
https://www.fine-tools.com/lightool-spanners.htmlThe TPU tubes are a lot lighter than traditional tubes. Using a spanner from the lightool range will save weight, the same as chopping up the existing spanner, but without risk of sharp edges etc...
As for the kitchen sink model of tool kit. I am well and truly a paid up card carrying member of that one. I have a top tube bag that is just tools, plus a track pump in the frame bag.
Why? Well If I've forked out all that money and effort to get to the start of a ride, I'm gonna be pissed off if half way round I have to pay more money to get a cab to a station to go home, cos of something that i could otherwise fix with simple tools at the road side. This is why I said earlier Your threat model is not my thread model (sorry I work in security). If you really don't care that you have to call the wife, or what ever the cycling equivalent of ADAC is 30km into a 200k ride cos your bike broke, then sure, carry next to no spares. But I want to be able to keep going. I've had rides where I've been unable to find an open bike shop for days, and hundreds of kilometers (Sweden, Luxembourg/France/Germany).
My tool kit currently is:
- 4 Tyre levers (with reflective tape): 2 is enough, but I've had them go ping into the undergrowth before. Not worth the risk they weigh fuckall
- VAR Bead Jack: Seating a tyre when it's -5°C and your hands are rapidly going numb, having a tool that can get a recalcitrant tyre into place easily is important
- Topeak Ratchet Rocket: Bit set + chain tool. Not the lightest out there, but exceptionally easy to use, very reliable.
- Puncture repair kit: Rema tip top TT02, filled up with extra patches. Riding in scandi the roads are covered in flints, which are a right pain
- Topeak mini torque bits: These go between a driver bit and the ratchet handle, and give 4/5/6nm torque wrenches. Useful for not over tightening things when in a rush.
- 15mm spanner: For my wheel nuts - Yep I don't run QR axles.
- 7mm + 8mm +11mm spanner: For doing the hoses on hydraulic brakes
- Di2 tool + spare wires: for (de)attaching wires
- Wolftooth cassette tool: These are ultra light cassette tools, carried not so much for use on the road, but if I can borrow a spanner from a farmer say. Weighs 31g.
- Wolftooth pack pliers with 2 spare links: Brilliant bit of kit, takes the faff out of breaking and installing quick links. Doubles as another tyre leaver at a push.
- Leatherman Juice CS4 multitool: A bit over kill, but pliers, knife, saw, etc...
- Universal key (
https://amzn.to/3f0hJYJ): Technically not a tool, but lives in the same bag. This has been a life saver for being able to use taps at gas stations, churches, and graveyards where the handle has been removed. I used this on the first night of the TCR to get water to refill my bottles.
- Mini ducttape roll: From AMK. Compact way of taking tape.
- Lighter: Useful for fixing frayed straps, and lighting fires (used that in finland).
- Water puritabs: again not a tool, but in the same pouch, just in case you find water you don't trust
- 2.5mm allen key: Needed to adjust GRX brake levers
- 3mm allen key: needed for TRP Spyre break adjustment, legacy item.
- Tyre boot
- 15ml Bottle of oil: Long rides means oil if it rains.
- cable ties, numerous
- USB cables
- Petzl E+lite compact head torch
- Spare bolts
- Spare brake pads
- Gloves
- 2 spare tubes
- Spare batteries (aaa + 2032).
I also have schrader to presta adaptors (plus dust caps) on both valves of the tubes on the wheels. This has been incredibly useful. When my previous pump packed it 60km from the end of RATN, it was only the presta side that failed, I used the Schrader adaptor, and could get my tyre inflated. I've also used them a lot in scandi at gas stations. I've lent them to other riders on Audaxes so they could use a gas station compressor to get their tyre up to a good pressure.
My pump is a Topeak Turbo Morph G. This is considerably larger than most people carry. But when you realise that getting a tyre upto 5-6bar with many a mini pump can be 300+ strokes, having a larger more ergonomic pump is a godsend. I've lent this to others at the side of the road, where they've been faffing with a mini pump and failing to get the pressure they need.
I appreciate that this is massively overkill for most people on most rides. But I've used every tool apart from the cassette ring at some point on one ride or another. Key tools have reflective tape on them as mentioned above. I've fixed strangers bikes at the side of the road. I've done repairs on my bike during ultra races. I've used them on audaxes, on tours. When I set out on a ride, I don't expect to have to ask anyone for any help whilst I'm on the ride. I value self reliance, and think it important to be able to fix your own bike where possible.
*BUT* with all that said. I know that other people have a different view on this matter, it's a very personal choice, and I would not say that the above is for everyone. The OP's kit looks like it covers the main issues. See top of this post for the easiest ways to make it lighter. I personally wouldn't use self adhesive patches, I've seen them fail in high temps, which are more common in summer now. But that's personal choice.
You pays your money, you takes your choice.
J