onelinkSpring bike check
Top to bottom, ~30 min. Each step has a guide.
1. Tyres Cracks? Pressure from sidewall https://www.sheldonbrown.com/tires.html
2. Tube Flat after winter = new tube https://www.parktool.com/en-us/blog/repair-help/tire-and-tube-removal-and-installation
3. Chain wear Over 0.5% → replace https://www.youtube.com/results?search_query=bike+chain+wear+check+tool