DIY PDW Bindle Rack, Try 1

thingiverse

See here for the background: https://www.reddit.com/r/bikepacking/comments/6n8i2f/help_with_designing_diy_pdw_bindlestyle_rackseat/\nIf you're mounting this to the seat stay eyelets, watch out for the dual-pivot caliper cable stop if applicable.\nHow I Designed This\nI stumbled upon the PDW Bindle rack a long time ago when it was still a prototype. Genuinely a good idea, but the exposed seatpost was still a problem. Also, just the rack costs $88.\nThe key is that it uses a metal clamp on the seatpost, which, when tight, prevents rotation about the seat post. Neat, but I couldn't easily do metalworking here, even though I can & would like to.\nInspired, I took the aluminum stays off an Axiom Journey rack, which are pretty long. I designed 3D printed pieces to bridge the gap between them. A channel in these pieces allowed a ziptie to close all the pieces together. Sorry, I don't have pictures of how it comes together, but I used electrical tape & inner tubes to shim for a tight fit. See Rail Spacer Together.SLDPRT for an idea of how it comes together. I printed two or three of those, & set them equally apart.\nI used 1" straps to secure the bag to the stays, & another strap along the length of the "rack" to constrain the bag fore & aft. This latter strap fed through the slot cut in the central rail spacer. Another set of strap secured the whole rack to the saddle rails.\nThe ends of the stays were bolted to adapters I CNCed from aluminum which gave me a functional eyelet on the seatstays. P-clamps would be far too weak. You can see the adapters here, on the seatstays. They're still there because I haven't gotten around to taking them off. My bike didn't have eyelets up there for my last rack, which required two stays.\nDepending on your seatstay diameter, I may have 3D printable solutions for you here, & here.\nI bolted them down there, since clamping to the seatpost would not leave me with enough space for the bag.\nThe last picture is a distant view of the setup, when I was touring. It was a little shaky, but I didn't notice it too much when riding. It definitely needed improvement though. I don't recommend it, because those tiny aluminum rack stays aren't enough to deal with 5-7 lbs of gear swinging at that distance from the bike.