Sprocket Alignment tool

[Canterbury]

Hey all,

I'm new here, but I designed a tool when re-building a bike that someone else had assembled that I thought I'd share. It may be a help to someone, heck it might not help anyone, none the less here it is.

First, my particular bike is a cruiser style with a 3/8" bolt on axle and a coaster brake. I designed this tool specifically from the measurements of my particular sprocket and bike. I have no idea how consistent these stampings are but maybe we can come to a consensus if anyone wants to share their measurements.

These are the measurements of the tool:
OD: 1.465"
ID: 1.133"
center bolt (axle): .370"
Internal height: .290"
Overall height: .4"

I designed this part in TinkerCAD and have uploaded it to Thingiverse, anyone with a 3D printer is free to download the .STL file and print it out.

Motorized bicycle sprocket alignment tool by CCantwell

I designed this tool in order to properly center the rear sprocket on my motorized bicycle conversion. This is a typical chinese 2 stroke kit where the sprocket is bolted to the non-drive side spokes of your bicycle wheel. I'm not sure of the consistency of these conversion kits and just as...

www.thingiverse.com

I don't have plans to produce these, but if we can determine a standard design and their is sufficient need I will consider printing some extras.
.

 

[Chainlube]

The cheapest sprocket alignment tool is a few wraps of masking tape around your hub. The beauty about it is you don't need a 3D printer.

 

[Member 30571]

On my 2 bikes I used an old credit card.... Perfect every time....