MTB steering damper

I made this steering damper after seeing the Syntace/Canyon KIS prototype floating around.

Try the system yourself using this adaptable DIY version! Replaces 15mm headset spacers below the stem.


What you'll need:

• 2mm Alu stock (flat bar works fine, must be at least 20mm wide)
• ~400mm 15-3M belt (HTD)
• ~10cm spring (I recommend around 12-15kg pull force)
• 3x M5x25 bolt & nut
• 2x M4x25 bolt & nut (can substitute one for M4x20)
• 4 zipties long enough to reach around toptube
• 2 washers M4 size, preferrably close to 15mm diameter
  
  

Printing:

I printed mine with PLA, but for longevity PETG or someting tougher would be better, although all load bearing interfaces are aluminum. 
Use plenty of walls and infill, preferrably print the belt-spring interface using 100% infill to prevent crushing.

The bike interface block is designed to print nicely rotated onto the rear diagonal face, standing upwards.


Installation:

Cut out two pieces of aluminum, one pressfit into the bike interface block. This one should have two holes cut in it: one 2mm one for the spring and two 6mm holes matching the bolt holes in the interface block. The rough shape for the plate looks like this:

The second plate goes between the two belt-spring interface blocks, also securing the two ends of the belt between it and the blocks. this plate should match the outline of the blocks and needs two holes: one 2mm hole for the spring situated close to the center of the slot. Secondly, cut one 6mm hole for the bolt in the center of the respective hole.

The belt needs three holes. One 5mm hole on each end for the belt/spring interface annd one 4mm hole in the exact center, for the connecting bolt with the steerer cam. Assemble this part like shown below, with two washers holding the belt to the cam.

Provided are different versions of the bike interface Block, for 40 and 55mm toptubes. Choose the one closest to your bike or use the universal flat/floating mount. It might require some sort of friction material (old inner tube/foam) for better grip on the top tube.

Enjoy!