Jump to content

The chainless bicycle.


red750
 Share

Recommended Posts

This was a promoted as a start up a few years ago. The price quoted was $US3800. Considering the design and materials, and comparing it to a competition road bike, that price would seem OK. 

 

The arguments against it seem to revolve around the mechanical efficiency of rotating pedals -v- up/down motion. I suppose that argument is the same one that is trotted out when a new design is compared to a tried and true one.

 

I wonder if you can stop "pedalling" and coast if you want to.

  • Informative 1
Link to comment
Share on other sites

All it is doing is using only a small portion of the rotational angle of the pedals. There is still exactly the same transfer of vertical movement of the foot to circular movement of the wheel, except that in effect you have the equivalent of two chainwheels.

Link to comment
Share on other sites

The problem I see with the design is the gearbox design. Nothing in the inventors website tells us anything about how robust the gearbox is. That's where the greatest weakness lies.

 

As far as the design goes, it does appear to have advantages over the old chain drive bikes.

 

The second problem seems to be, the inventor is having trouble getting the bike into the market. I suspect there are still "bugs" in the design, and I suspect they might be in the gearbox. The video shows a rider coasting, so it obviously has coasting ability.

Edited by onetrack
Link to comment
Share on other sites

I had one of those Sturmey Archer 3 speeds, with a built in dynamo. The best part was the dynamo. The gears were nowhere near as good as a derailleur. I must admit they were much stronger than you would expect.

It should be possible to change gear ratios, by varying the lengths of the levers on the new bike.

Edited by Yenn
Enlarging on theme
Link to comment
Share on other sites

I remember the dynamo being on the front wheel. I too had a Sturmy Archer 3 speed, but mine was old to start with.

My current bike has electric assist and 6 Shimano  gears, but the gear ratios are so wrong that only the top gear is useful, even when going uphill. I need to try and get a bigger front sprocket.

Edited by Bruce Tuncks
Link to comment
Share on other sites

  • 9 months later...

Would like to have a go on one of these things, there is a huge loss with circular pedalling, but it gives your legs a bit of time to recover from the short downward stroke. Love my mountain Ebike and remember my first bike which was a piece of junk with the rear hub brake, never able to afford a Malvern Star but my second bike had 3 gears and hand brakes, that kept me mobile for a few years. Especially when got hold of a dynamo, then night riding was possible and could go anywhere, with a carrier on the back with two old leather school bags each side and basket on the front, it was like a home on wheels to me.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...