DeltaWolf Steering Mod - Page 1 of 5
Here is a simple modification for all you DeltaWolf and Marauder builders who would like to try under seat steering. This mod is based on some sketches I made, which I said I would upload for others to try. Rather than give untested advice, I have successfully made the modifications and will present them here for all my fellow garage hackers and bike builders. This modification would probably work for any recumbent with a 1.5 inch or larger main boom and linked steering as well.
Although you will have to make a few cuts to your frame, the good news is that you will not need to source any extra parts except for the handlebars, and the surgery can be done in an afternoon. Under seat steering allows the arms to rest in a more relaxed position beside your body, and allows the pilot to climb in and out of the bike without having the steering stem in the way. Under seat steering does however feel quite different than the conventional handle bars out front system, so think about this modification and read it through before you start up your grinder.
The original steering system must be completely removed from the frame before you can make this modification. Before you cut any tubing, make an "X marks the spot" mark on the main frame boom directly under the original steering head tube as if you were looking through it down to the frame. By transferring this mark to the frame, there will be a good chance that the original steering control rod will be the correct length after the surgery, saving you a bit of work.
Cut into the steering system tubing just above the welds so you do not damage the original frame boom when you are removing the original steering system. The leftover weld metal can be carefully ground clean using a sanding disk to avoid taking down any of the original frame tubing material.
The head tube will be recycled, which is logical since you already have all of the proper fitting steering parts such as bearings, cups, and the fork stem. By making a few rough cuts with a cut off disc, you can safely liberate the head tube from the frame tubing without the risk of damage. Avoid cutting into the head tube material when you are separating the parts, or you will have to repair the area later. The head tube will be getting a few inches cut from it as well, so don't worry about cleaning up the excess metal after separation at this point.
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You can build it yourself from our easy to follow DIY plans!