2-piece Bike Spoke guard / dork disc / bicycle spoke protector / bike spoke cover

thingiverse

A 2-part bike spoke guard so you don’t have to remove your cassette to install it ===== My old spoke guard (aka dork disc or dork disk, though I dislike that name) cracked after years of use, so I decided to try to print my own. You don’t absolutely need one, but I’ve gotten my chain caught between the cassette and spokes (once ever) enough to prefer one. I don't mind the pie plate. The nice thing about this spoke protector is that it prints in 2 halves so that you don’t need to remove your bike’s cassette to install it. It’s still a little tricky to fit the guard behind the cassette though. You will need to print 2 of the included STL. Two small 2.5mm wide zip ties hold the halves together. There are additional holes for attaching to spokes, but I don’t recommend it, as that will warp the spoke guard and might cause rubbing when coasting. How to install the bike spoke protector ===== To install, I recommend loosely attaching 1 zip tie to connect the two halves. Slide the bike spoke guard behind the cassette and make sure the tabs engage with the flange of your bicycle’s rear hub. When you’ve got it seated well, then feed another zip tie in to finish connecting the two halves of the spoke protector. This part is a little annoying, but I guess it’s less annoying than taking the entire cassette off. Tighten the zip ties and cut off the excess. It may help to pre-bend the tip of the zip tie so that you can more easily work it into the other hole. Spoke guard measurements and specifications ----- Not sure if there's a difference between these for mountain, road or kids bikes – I just measured the old spoke guard I had that broke and made this one to similar dimensions. The inner hole diameter is 61mm but this spoke protector is designed for about a 54mm hub flange. The tabs extend to 51.5mm, so a hub flange somewhere in between 52.5-54mm would probably be okay. The outside diameter is 155mm. Printing specifications ----- You will need to 3D print this with supports. I think I used 50% gyroid infill with 3 walls. Print it so it's wider than it is tall, not like how it shows up by default in the thingiverse preview. I printed mine with the widest diameter part on the bottom. Removing the supports was annoying, so it may be better printed the other way.. I have not tried though! This is a work in progress ----- My chain rubs a bit when my bike is on the lowest gear, but this works better than what I had before. So I don't mind. I could probably fix that and make it less warpy, but it works fine for me as-is. I will post more bike 3D STL models on my website: [ascentale.com](http://www.ascentale.com)