Dryline Mechanical Disk Brake Cable Vent For Bicycles
Description
Update: removed my website, as I’ve closed the business to concentrate on more general design and printing. This is the project that got me started in 3D printing, back in July 2018. (Yeah, I'm a relative newbie, but I've always been a bit of a maker.) Bicycles are my main passion. Even music isn't as big in my life, but I'm not a sports rider, I have never raced, I ride for transport, and I cycle tour when I can, too. My latest touring bicycle has mechanical (cable operated) disk brakes. I prefer cable disks to "hydro" disks because I can fix a damaged brake cable on the road. Damaged hydro lines? Well, country bike shops, some are great... Some. There is one small problem with cable disk brakes on touring bicycles... Touring and commuter bikes are designed for pannier bags, therefore, they need the rear disk mounted inside the frame. This means the cable has to run down the downtube, under the bottom bracket and _UP_ the off stay to reach the brake calliper. In wet weather, this route leaves the cable sheath pointing up and creates a little reservoir in the sheath underneath the bottom bracket. This pool of water takes forever to dry, if it ever does, collect dust and mud, and eventually seizes the cable. Old fashioned rim brakes don't have this problem because they were never hydraulic, so could have "ventilated" cables, with long stretches of exposed inner, allowing for dry brake lines. Disk brake bikes are exclusively designed for hydraulics, so cable disks have to have full length sheaths, creating seized line after wet weather. I designed this part, showed it to cycling friends, shared prints with a friend who hires out touring bikes, and have had the product on sale in a friend's bike shop. Most people who get why cable disks are not obsolete on transport bicycles also get why the Dryline is useful. The bike shops in my area sell show pony carbon to MAMILs and useless $10000 carbon mountain bikes to teenage thrill seekers. (I'm a former mountain biker, the modern XCs and DHs are as practical as a Formula 1 car for the daily commute.) Nobody wants to sell Dryline, except my mate in one of those really good country bike stores. (Hi Matt! And people, do check out Break O'Day Cycles, St Helens, Tasmania. Matt's been in the industry for decades and knows bikes! Likewise, a big hi to Tim at Longhaul Tasmania, touring bike hire to see Australia's beautiful wilderness island by.) Sadly, iDryline too niche an idea to make money on, so I'm open-sourcing my design. I'll still sell them to people, manufactured and ready to go (clunkerbike.com), but I've invested all of my savings into this, can't afford to patent it, so I'm setting it free in order to have the time to work on other things. Print in whatever you think suitable. Mine is white PLA. It's been on my bike since August 2018, in all weather. It improves the rear brake modulation (yeah, that surprised me no end!) and my rear brake now works better than my front did, brand new. Friends using it rave about it. Mechanical disks are genuinely better brakes for touring bikes and for urban bikes, and this solves the single biggest problem inboard rear disk brakes have. Ladies and gentlemen, start your printers. Please note: The Licence is CC4 requiring Attribution to me, Steve "Crunchysteve" Jay of Melbourne, Australia, Non-Commercial applications only and, if you remix it or share it, you share it with those same restrictions on your file, attributing all unmodified openSCAD code to me. CC4 Attribution, BNon-Commercial, Share Alike.
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