Bicycle chain guide

thingiverse

EDIT: === I created an STL file for a guide but mounted it on the other side of the seat tube - opposite to the rear wheel. === So the STL files are - declan2.STL guide for the front of the seat tube declan3.STL guide for the back of the seat tube A simple-to-print and easy-to-use Bicycle Chain Guide, designed specifically for my 1x9 custom-built Bianchi bike. You can also use it by adjusting two main parameters: 1. The angle of the seat post tube 2. The offset for the chain ring - the tunnel where the chain passes through. It's held in place by two plastic ties, and you can insert a piece of rubber (an inner tire) between the guide and the seat post tube. For a seat tube with a 29mm diameter and a 46.5mm chainring offset.