crazy old man · video

What this video covers

Sinomar Godois Tavares abandons his DIY puncture-protection method for bicycle tires after repeated failures on the rear wheel.0:08 His initial design, which utilized EVA foam and PET plastic strips, caused three separate punctures by shifting and cutting into the inner tube under load.0:27 The heavy weight of his touring setup, including a dog trailer and camping gear, creates excessive pressure that causes the PET strips to break at the seams and migrate inside the tire casing.0:34 Despite attempting to reinforce the seams with silver tape and overlapping the plastic, the internal structure loses its shape and integrity during use.8:49 He concludes that the DIY PET liner is unviable for long-distance touring and warns that the method causes more flats than it prevents.9:43 He plans to test a new configuration by inserting a cut-up inner tube inside another, a technique used by cyclists in the Caatinga region to protect against thorns.4:53

More from crazy old man

Veio Doido Sailboat #50 - Crossing from Guarapari to Búzios - Recording during the journey. Rain and windMay 2025Veio Doido Sailboat #49 - Crossing from Guarapari to Búzios - Time: 44 hrs. Experienced sailors: 24 hrsMay 2025Sailing Vessel Veio Doido # 48 - Crossing from Vitória to Guarapari - Very calm and pleasant sailApr 2025Sailboat Veio Doido # 47 - Farewell to Vitória ES - Veio Doido at SeaApr 2025

From crazy old man — see the channel’s boat, crew, and every analyzed video.

The Sailing Directory Newsletter

One email with the fleet's best finds — the moments, boats, and stories worth your watch time. Enter your own address to get your own copy.