DingusMcGee
100 kW
It seems the wonderful Thudbuster was made without any concern of compactness. Short people may find either the LT model at 145mm above seat tube or the ST model at 100mm above seat tube to high to have their feet touching the ground the way they like. By adding vintage seat post clamping guts oriented downward, instead of using their seat clamping method, you will gain about 29mm lower seat height. This method takes 2 sets of seat post clamps and they are fixed through the top 2 Thudbuster bushing holes with 1/4 x 3" bolts washered at each end and fastened with nyloc nuts. This setup will fix the seat angle [not quite ideal] but the seat will still travel in the same arc. If you tighten the bolt too much the sear will not travel. This particular seat now has about 1 1/8" room above the top of the Thudbuster for seat diaphragm compression which seems plenty. see pics.
To gain more lowing on the bike seat I also cut a portion of the top of the seat tube off. Since the in use loading of where the alum welds of the ends of the upper stays are, they would tend to compress the seat tube, so I cut the tube only as close to the welds as the tubing cutter would allow [about 1/2"]. If the frame were steel and the Thudbuster tube fit tight, I would cut the extra height off at the welds. Steel is very repairable.
To gain more lowing on the bike seat I also cut a portion of the top of the seat tube off. Since the in use loading of where the alum welds of the ends of the upper stays are, they would tend to compress the seat tube, so I cut the tube only as close to the welds as the tubing cutter would allow [about 1/2"]. If the frame were steel and the Thudbuster tube fit tight, I would cut the extra height off at the welds. Steel is very repairable.
