Live data from Hacker News

Tennis balls serve as decent bicycle tires that don’t easily puncture

hackaday.com

11–20 of 66 posts

Re: Tennis balls serve as decent bicycle tires that don’t easily puncture

#11
post #9
post #6

How’s the braking performance? Wouldn’t the tennis balls function as a kind of high-friction ball bearing, and allow the outer tire to slip when stopping?

I'm concerned about the tire slipping off on a corner, too.

Yep, that was my thought has well, certainly the in video they didn't show any type of turning with any amount of lean into it where this would have been an issue.

Re: Tennis balls serve as decent bicycle tires that don’t easily puncture

#12
Everyone who plays tennis knows that tennis balls don't retain their pressure for very long once outside their pressurized cannister, though. I can't tell if this article is just ignoring that fact or if they are actually running on "flat" balls. (Balls that are too flat to play with still have some pressure and might work fine, I guess, though it seems like riding on them would just flatten them more.)

Re: Tennis balls serve as decent bicycle tires that don’t easily puncture

#13
post #6

How’s the braking performance? Wouldn’t the tennis balls function as a kind of high-friction ball bearing, and allow the outer tire to slip when stopping?

The balls are inserted into PVC rings, which are screwed to the hub, so they can't move. (In my mind this also means that the tire is made of PVC rings and that the balls serve more as decoration, but hey)

Re: Tennis balls serve as decent bicycle tires that don’t easily puncture

#16
post #2

this caught my eye as similar to a concept from long past readings its not a new concept, e.g https://www.evolutionwheel.com/blog/advantages-of-segmented-... this was proposed for consumer automotive, as a tire with a number of wedges/segments with a sealed pneumatic core. you would buy an allotment of these tire segments and replace individual ones in moments as need be. maybe i read about it from a mid-80s issue of…

I think Continental had something similar near production already but cannot find a link. edit: looks like every tyre manufacturer has an "airless" product: https://www.bridgestone.com/technology_innovation/air_free_c... https://corporate.goodyear.com/us/en/responsibility/blog/adv... https://www.michelin.com/en/innovation/vision-concept/airles...

The Michelin tire was on HN in 2019, with 131 comments:

https://news.ycombinator.com/item?id=20113174

Post reply on HN