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The amazing shrinking Black Hole and a Lime

In a comment to my last post, 54 mentioned that he remembered seeing a later prototype of the Black Hole with a smaller hole in the center. He followed up by sending me this picture of the wheel from a mid nineties issue of Road Bike Action. What a shame it is when those pesky laws of physics conspire to smash one’s blue sky concept. This prototype may have actually been rigid enough to work, but I seriously doubt that it was still a pound lighter than a conventional setup. It looks heavy to me, both visually and in weight. I would assume that the rolling resistance was greater than a conventional wheel as well. Oh well, at least they tried.

Also from recent comments, and anonymous reader points to better pictures of the Trek Lime prototype. For its intended market, I think the bike, especially the drivetrain area, looks pretty good. The way that the crank integrates with the chain guard is a nice touch. Speaking of the crank, notice that it says Bontrager and not Shimano. I am a bit confused. Are just the hubs and automatic shifters from the new Coasting group? I guess so. Maybe Trek had to design a new crank since they planned to integrate it with the guard.

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5 Responses

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  1. Fritz says

    Trek Lime — those photos are much better than the fuzzy bigfoot photos from elsewhere :-)

  2. James says

    No doubt, those shots are much better. Still, you have to admit that the fuzzy bigfoot photos make you feel like you are really getting the inside scoop.

  3. Anonymous says

    I test rode a bike with two of those wheels once for the designer. Long time ago lost the the fog of the past. Interesting, but it was pretty clear they were a long way from something that would ever work.

    Nice blog

Continuing the Discussion

  1. A hubless wheel from the past: The Black Hole | Bicycle Design linked to this post on March 16, 2010

    [...] better time to revisit a couple of old posts about a hubless wheel, which (I believe) actually went into production for a short time in the mid 90s. The picture you [...]



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