G-Sport

I'm all for innovation, I've actually sketched up some ideas similar to this in the past. This one raises a couple of questions straight away:- 1. How do you push the disc closer with the "chain" filling the gap? Belt CVT's like you find on a bandsaw have to move the belt out evenly rather than in steps, which requires some slip. If this is using a chain with distinct steps then I don't see how you would move a single disc inwards, instead you would need to segment the moving disc and move a segment at a time while it is in the chain-free part of the rotation. This is not insurmountable but it adds more complexity. 2. Another issue is chain strength, with a very small front sprocket the applied torque starts to generate a very high tension in the chain, a standard bike chain won't handle something as small as this looks.

Mud, unsprung mass, durability...

@ice29: "access to spare parts" doesn't exactly sound like "continued warranty cover"... There's going to be a lot of very cross people out there, both customers and bike brands.

I don't love a chromed hub. Polished I'm fine with, which hopefully this is. But chrome on Aluminium is unnecessarily polluting and nearly always ends up flaking off in time.

Does ANYONE who designs flat-pedal-shoes actually run flat pedals? What's with all these huge gaps where your pins are going to be? Just give us toe and heel tread and then a nice flat area for the pins to dig into uniformly!

@superkeen: The danger is that the pre-load diminishes if you give the applied load a sufficient lever arm...

1. Way before this many..

@IllestT: Since when is 600W and 85Nm "low power"?

@nzandyb: I don't think people have been snapping the clik valve, just the stem they are using it with. Some stems are just weak, I've snapped them with a normal presta, I have good ones now and they are fine.

Amazed I had to scroll down so far for this. Clik valve for the win. Never mind the moments other valves might save during install or sealant top-up compared to unscrewing the core, I'm more interested in the time saved every single ride checking pressures and topping up air and without any air-loss bringing sealant back up to wreck my gauge or clog the valve.