Nice DIY project. I was looking for something similar, but don't have the CNC equipment. So decided to go with a seat tube quick clamp rear racks made of aluminum. They're inexpensive and heavier, but can hold more and accessible for other cyclists who want something similar.
Not sure of the dimensions, but this ( or a variation) would be a nice 3D printing project. BTW, I use an inexpensive drawstring "backpack" for simple, lightweight carrying needs. I roll it up and tuck it in between the seat rails and above the seatpost. It's always available in case i need to carry something like a clothing layer or some trash that anniys me.
I haven't bought a 3D printer yet, to me it seems like parts would not be as strong as a part machined from a solid block of plastic. Dimensions are about 230mm x 120mm. I also carry this bag I made that goes on my aerobars... ruclips.net/video/zy016gU0FFU/видео.html
@@etischer In this case, I think the 3D print could be as strong or stronger. 3D prints are relatively weaker when stresses shear or pull on the layer structure. But with a rack like this, that would not be the case. I use tire levers that I 3D printed using PETG filament. I work on bikes about 12 hrs a week and they get pretty heavy use. One advantage of the 3D print is that the material could be made thicker near the attachment point. That could be an advantage for the center "beam".
@@etischer I like your aero bar bag idea. I may copy that as well. Walmart has some nice canvas-like material with a PVC backing (Pro-Tuff) what should work well. Mine will have to be shorter since I run bar end grips in the middle of the bar that aren't true aero bars.
Have you considered making this in a larger size? Just curious if this concept could be adapted so that this rack could hold a tent, for example, or some other larger, heavier item. I wonder where the limit is for this design
The clamp I'm using was designed to hold a water bottle, so by itself, it would not support a tent cantilevered out like that. Straps attached to the seat rails would be needed to support something heavier / longer. Without rear straps, the clamp I'm using would bend from too much weight. I would probably opt for a metal clamp as well.
@@etischer Just in case you were waiting for an email, I'm not going to be able to use your rack. With the dropper post and a Garmin Varia there just isn't room for the rack and a pouch back there. Looks like it's back to the drawing board.
The Topeak bag was compared because it's one of the only bags that would mount to my suspension seat post. And It has all the features I need (quick release, no seat rail attachments) but nobody makes anything like it that's smaller and lighter, so that's why I've compared it. Seems like a great bag, I could live with the size, I just didn't want the mount stuck on my seat post when the bag is not being used.
These videos are amazing examples of practical and well thought out engineering! They need to show this stuff in high schools!
Part of the goal in making these videos is to inspire people to get creative and build things rather than buy them. Thanks for the comment!
Nice DIY project. I was looking for something similar, but don't have the CNC equipment. So decided to go with a seat tube quick clamp rear racks made of aluminum. They're inexpensive and heavier, but can hold more and accessible for other cyclists who want something similar.
Great work sir! Lovely MYOG, Yours is even lighter than mine.
That is a very very good idea. I have one of these skf bottle mounts and am going to use it for a DIY fender.
Clever. Efficient.
Not sure of the dimensions, but this ( or a variation) would be a nice 3D printing project. BTW, I use an inexpensive drawstring "backpack" for simple, lightweight carrying needs. I roll it up and tuck it in between the seat rails and above the seatpost. It's always available in case i need to carry something like a clothing layer or some trash that anniys me.
I haven't bought a 3D printer yet, to me it seems like parts would not be as strong as a part machined from a solid block of plastic. Dimensions are about 230mm x 120mm. I also carry this bag I made that goes on my aerobars... ruclips.net/video/zy016gU0FFU/видео.html
@@etischer In this case, I think the 3D print could be as strong or stronger. 3D prints are relatively weaker when stresses shear or pull on the layer structure. But with a rack like this, that would not be the case. I use tire levers that I 3D printed using PETG filament. I work on bikes about 12 hrs a week and they get pretty heavy use.
One advantage of the 3D print is that the material could be made thicker near the attachment point. That could be an advantage for the center "beam".
@@etischer I like your aero bar bag idea. I may copy that as well. Walmart has some nice canvas-like material with a PVC backing (Pro-Tuff) what should work well. Mine will have to be shorter since I run bar end grips in the middle of the bar that aren't true aero bars.
Have you considered making this in a larger size? Just curious if this concept could be adapted so that this rack could hold a tent, for example, or some other larger, heavier item. I wonder where the limit is for this design
The clamp I'm using was designed to hold a water bottle, so by itself, it would not support a tent cantilevered out like that. Straps attached to the seat rails would be needed to support something heavier / longer. Without rear straps, the clamp I'm using would bend from too much weight. I would probably opt for a metal clamp as well.
I'm interested in just this type of rack, also to carry a jacket. How much are you thinking for the machined part, as I can get the rest myself?
How about $25 including shipping for the machined frame? I can do black or white. send me an email if you're interested: etischer@etischer.com
@@etischer Just in case you were waiting for an email, I'm not going to be able to use your rack. With the dropper post and a Garmin Varia there just isn't room for the rack and a pouch back there. Looks like it's back to the drawing board.
I’d love to buy one! Are you selling?
Nice😊
Nice project! But unfair comparison to the Topeak, that has way bigger volume, considerable more weight carry ability and easier on-off for city use.
The Topeak bag was compared because it's one of the only bags that would mount to my suspension seat post. And It has all the features I need (quick release, no seat rail attachments) but nobody makes anything like it that's smaller and lighter, so that's why I've compared it. Seems like a great bag, I could live with the size, I just didn't want the mount stuck on my seat post when the bag is not being used.