Mounting accessories on frame

• See these Greenspeed pages. Jean Seay & Michael Painter
  
  
• Lorenzo L. Love's Tour Easy mount
  
  
• Jacks Front Derailleur Post
  
  
• Here is John Doubledays method. Make a T piece out of bike tubing, cutting a slit in the bottom. This then slides nicely over the derailuer tube and is held in place by the front derailuer. A bike computer can then be mounted as if on normal handlebars. If making all from scratch it probably would be best to make it so the slit T piece tube is the correct size for a front derailuer to mount onto and a slightly smaller tube for the riser tube. If you're cutting the bottom bracket from bike frames, many frames that weren't made for front derailuers have this smaller size tubing.

• See the Vision, pic 1, pic2, (anyone know the author of these pics?) Picture explains enough really. Obtain the mounting parts from an ex bike steering head.

• A Rubber Stopper made for seat and table feet work well. Get one that slides over tightly and has sufficient 'body' A bike computer can then be mounted on top, the rubber damping a little of the vibrations.

• An alternative to having a T piece is to make a U shaped piece at the top of the tube. A short length of dowel can be screwed between the ends of the U piece making a bike computer mount. This all can be fixed to the derailuer tube using one of the ideas shown above. To fix the U bracket to the tube you could
  - Weld it there.
  - Weld the tube end up then tap a thread in the centre so a bolt fixes the U shaped piece to it.
  
  Instead of dowel you could put into the ends of a short length of frame tubing, plastic handlebar end caps and use a long bolt and nut to hold it there.

• Similar to the one above but with a L piece. A short length of dowel can be screwed to a L piece of material. This all can be fixed to the derailuer tube using one of the ideas shown above. To fix the U bracket to the tube you could
  - Weld it there.
  - Weld the tube end up then tap a thread in the centre so a bolt fixes the L shaped piece to it.
  The plastic L piece can be taken from a car accessory gauge.

• Mounting a bike computer on a square or rectangular frame.The plastic L piece is taken from a car accessory guage.

• Rear-view Mirror & Custom Combination Headlight and Cyclometer Mount, Rear-view Mirror & Cyclometer Mounting & Updated Computer Mount at the Unofficial Dragonflyer Info Site
  
  
• Recumbent Computer Mounting
  
  
• From: Ian Sims - GREENSPEED
  Date: Tue, 5 Sep 2000
  Subject: [trikes] Greenspeed adjustments
  List-Id: Recumbent Human-Powered Trikes <trikes.ihpva.org>
  
   Ross Lowell asks:-
  Any thoughts on minimum overlap of boom within front tube before flex or other mechanical problems are likely to occur.
  
  I design to have 100mm of overlap in the boom, i.e. approx. the length of the slot.
  

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Thursday, 29 January 2009