Chain Guide, ala PVD

By running a single front ring on my six speed MTB, I have to have a way of keeping the chain on the ring. Without a guide, the chain will fall off several times a ride.

Since I ride trails, I wanted a nice solid chain guide that didn't mount in a heavy way to a bash guard. Chainrings are the only bash guard a singletrack rider needs.



The Truvative Boxguide box is available as a spare part for about $20. It's a good idea to design around cheap and commonly available consumables.

This is the stock configuration of the part.





The parts included in the spares.



I machined a custom bracket to mount the box to my frame from the seat tube. Locating the proper position of the guide was the most difficult part, but a little math helped.



It's a super solid set-up.



139 grams. Not the lightest, but tougher than anything you can find.







Pretty slick!