Škoda DuoBell: A bicycle bell that penetrates noise-cancelling headphones

Re:Škoda DuoBell: A bicycle bell that penetrates noise-cance... by deathanatos on Wednesday April 08, 2026 @10:15PM (#47698593)

… I have a modern bike (a Specialized). The tires' rated range is 75psi to 100psi. I usually pump it to around 80–85psi. The tires are 33mm.

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Re:Škoda DuoBell: A bicycle bell that penetrates noise-cance... by shiroiuma on Thursday April 09, 2026 @02:08AM (#47699859)

You're overinflating your tires. A lower pressure will increase your speed and efficiency unless you're riding in a velodrome. Here's a video about this:

https://www.youtube.com/watch?v=7r8f3w89XeM

(watch out, there's a lot of extra stuff in this video about the machine they use to measure efficiency)

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Re:Škoda DuoBell: A bicycle bell that penetrates noise-cance... by deathanatos on Thursday April 09, 2026 @10:55AM (#47704579)

(Well, they should tell the manufacturers…)

The video's result for both tires they tested was peak efficiency at 5 bar. They had a really coarse sampling of a whole bar, so that works out to a pressure of 65–80 psi.

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Re:Škoda DuoBell: A bicycle bell that penetrates noise-cance... by shiroiuma on Thursday April 09, 2026 @08:02PM (#47711901)

>(Well, they should tell the manufacturers…)

The manufacturer rating is likely a max allowable pressure rating.

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