This is a work in progress, and would be interested to hear what other people carry.
I saw someone yesterday near RMIT attempting to ride a city bike one handed while rolling his punctured FG bike alongside. Got me thinking I should offer my evolving thoughts.
I’ve since replaced the flimsy stamped 15mm spanner (which came with my washing machine) with the smallest Sidchrome CrV adj spanner (100mm) - but it’s no ring spanner. I’ve also added fresh 2016 batteries for the lights. I’ll swap the tube patches / cement for those ParkTool pre-glued ones too.
A lot of people carry bags so it’s no big deal, but something like this fits in a pocket for training on Beach Rd etc - I’ve been whittling it down.
Sauce bottle is chain oil - useful the first ride after a chain degrease.
My single speed/fixed uses Phil Wood hubs so I don’t need a spanner. For self adhesive patches, I’ve found that the Park Tools ones work very well, much better than the regular glue+patch kits. For my hub geared bikes, I only carry these patches and no spare tube as the rear wheel is complicated to remove.