Comments on: Peugeot B1K concept bike

By: Peter

Peter — Wed, 17 Feb 2010 11:29:57 +0000

The handlebar puts you in about the same position as you would on a Tron lightcycle and may require you to slouch due to its bike structure.Stated as a racing bike, the Peugeot B1K Concept Bicycle uses a chainless drivetrain, and carbon fiber materials. As of now, not much is known on production, and more than likely we can say this is eye candy.
Army ration Packs

By: Andrew

Andrew — Fri, 05 Feb 2010 21:42:12 +0000

@rbt

You've hit the nail on the head with the latter point. A hubless rim needs to be dramatically stiffer because any out-of-tolerance on a hubless wheel affects drivetrain efficiency as well as braking and ride. And because all that extra mass is located at the rim, the rotational inertia is hugely greater.

The spoke-tensioned wheel is a thing of engineering beauty.

By: rbt

rbt — Fri, 05 Feb 2010 10:21:27 +0000

i am not that sure, that a hubless wheel such a stupidity and just a simple eye-catcher.

from mechanical point of view, it's a lot better to insert forces at the rim not at the hub (leaver).
it also saves a lot of weight by shortening the drive-train.
just fair to mention, that of course the rim has to be more rigid and that maybe equals the gains from the drive-train cutting.

By: Andrew

Andrew — Mon, 01 Feb 2010 19:55:34 +0000

Even if it's not an especially realistic design, I do appreciate that it at least contains some interesting architecture and design concepts that go beyond solely aesthetics, though obviously the impeccable realization of the look is probably 90% of the concept.

I like the beam-frame structure, and the adoption of cables as tensile elements, both of which I think have not been explored enough in contemporary bike design. The hubless rear wheel, however, is always a groaner, though…the ultimate triumph of aesthetics over practicality.