Get in touch

We’re always looking for new content submissions, please get in touch via our contact page here.

Cyclo - Perry Coaster

Posted: Friday 12th June 2020

Author: Peter Underwood

AVT sent me these images which I have tried to stitch together, not very well, but I think you will get the idea. I spent some time puzzling as to what was the point of this device. Eventually I realised that the rear hub constituted a derailleur/back-pedal brake and this tension device allowed one to pedal backwards putting the required pressure on the brake to operate it. This of course straightens the lower chain run under tension. The resulting chain slack on the top run is taken up by the conversion. The description below says that the pivoting cage pivots on the lower part of the attachment but I cannot see how this ties up with the illustration where it pivots on the upper part.

There are images of two different versions of this device, one with twin-pulleys and one with a single-pulley. It should be noted that the instructions state – only use a 46t chainwheel.  This is to give the correct chain line through the device.

Thanks for reading

Posted: Friday 12th June 2020

Author: Peter Underwood

Rate this page

How would you rate the quality of this article?

Average Rating: 0 / 5. Ratings: 0

Be the first to rate this post.

This article appears in the following categories.

This article has been tagged with the following.

Upcoming Events

Whether you are looking for a gentle social meet up, or a 100-mile ride browse the community’s upcoming events and plan your next weekend outing.

Join our community

Get the latest news and updates from us directly when you sign up to our newsletter.