Bruce went crazy with his drill press, and removed, if I read his notes correctly, about 13.7 pounds from the normally 30 pound Catrike Speed! This is Catrike #CS754, named Holey Spokes.
Now we need to see that thing assembled, a final weigh in, and a test ride to see if it whistles. Its just remotely possible that Bruce has too much time on his hands. One last picture:
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Clarification! Bob neglected to mention that the 13.7 lbs is from the trike starting at about 36lbs! It sits at 22lbs, 3oz right now, with some lighter front wheels coming from PowerOnCycles, and a new carbon rear der in place of the drilled Deore XL der. That, alone, is worth over 100 grams, or about 1/4lb! When everything is done, it will be well under 22lbs.
Careful there, Bruce! I remember the drillium years and also remember a friend laying in the middle of the road, dazed, with a crankarm still strapped to his foot.
Of course, at least you won’t fall over! It may be a long walk home, though!
Pretty cool, though, I must admit!
Dennis T
Very nice. Could you perhaps thread the crank holes and have multiple crank lengths?
Bruce! I don’t know you, and I trust you’re well aware of the risks (stress risers!) and weaknesses created by all the holes you’ve drilled… However, this post still makes me feel like a mom: I’m concerned for your safety! I remember the 90′s, when folks were doing this with Campy parts and other bits to shave weight. Almost all the drilled parts eventually ended up cracked at a stress concentration point created by the hole. If you’re light in weight and light on the pedal input, maybe this will be OK for a bit? Sure looks nice, thought!