New Fixed Gearhub

garage sale GT said:

OK, so it's only approximately like a gearhub. It's not spelled out on the site but I believe the gearshifting action does not depend on freewheels like other gearhubs do and could be used as a fixed gear.

The link didn't work for me... broken. I went over to their website though... why would you use the nuvinci hub for a fixed gear? A fixed gear hub is already pretty darned simple.

tinydr said:

The link didn't work for me... broken. I went over to their website though... why would you use the nuvinci hub for a fixed gear? A fixed gear hub is already pretty darned simple.

In order to have a fixed gear bike which you can shift. Who said anything about simplicity?

All right, so it would be a niche application.

garage sale GT said:

In order to have a fixed gear bike which you can shift. Who said anything about simplicity?

All right, so it would be a niche application.

The website focused on the hub's simplicity as a major plus... keep in mind, like I said, the link to the pdf you posted didn't work for me.

So... what you're suggesting is that you could use the nuvinci hub to switch between different rear "cogs"? Maybe I'm missing something major that was contained in that pdf, like say... when they specifically describe it's application for fixed gears?

Unless they engineer a version for fixed-gears, I'd be concerned about durability...

tinydr said:

The website focused on the hub's simplicity as a major plus... keep in mind, like I said, the link to the pdf you posted didn't work for me.

So... what you're suggesting is that you could use the nuvinci hub to switch between different rear "cogs"? Maybe I'm missing something major that was contained in that pdf, like say... when they specifically describe it's application for fixed gears?

Unless they engineer a version for fixed-gears, I'd be concerned about durability...

Look at how it works. It clearly could work the same in both directions.

garage sale GT said:

Look at how it works. It clearly could work the same in both directions.

It "could" work in both directions, but does it currently?

I said I had concerns about durability, e.g. when you're going from cranking forward to kick stopping... they say their hub is crazy durable, and I'm sure that's true, but I'd still be concerned about putting stresses on the internal components of the hub that it wasn't designed for...

At this stage, the hub they've designed is for use on utility/comfort bikes... nowhere that I saw did they discuss its use with a fixed... so I'm not so sure they have engineered the input side of the hub to engage the output side of the hub in both directions... unless you've read different?

tinydr said:

It "could" work in both directions, but does it currently?

I said I had concerns about durability, e.g. when you're going from cranking forward to kick stopping... they say their hub is crazy durable, and I'm sure that's true, but I'd still be concerned about putting stresses on the internal components of the hub that it wasn't designed for...

At this stage, the hub they've designed is for use on utility/comfort bikes... nowhere that I saw did they discuss its use with a fixed... so I'm not so sure they have engineered the input side of the hub to engage the output side of the hub in both directions... unless you've read different?

It looks like a symmetrical design to me, but of course you're completely right. I would ask before spending $400. Nobody is saying to just run out and buy one. I would also find out if it is threaded for a lockring.

bump up. Anyone have any further info on this CVT hub?

From the drawings it doesn't appear to have a lockring thread. And the ISO disc pattern can only be used on the left (outer hubshell) side. The cog drives the right (inner) side of the hub.