Comments for Bicycle Technology and Patents

Comment on Removing / Replacing cartridge bearings in Rear Wheels, by Trikebldr by shaver

shaver — Wed, 04 Apr 2012 22:14:26 +0000

what is the question?

Comment on Removing / Replacing cartridge bearings in Rear Wheels, by Trikebldr by Brad Bosworth

Brad Bosworth — Wed, 04 Apr 2012 20:40:00 +0000

i have a qustion about seat replacement on cat, email me please

Comment on Trike Doctor bike/trike repair forum is open for business! by jefferson

jefferson — Sun, 18 Mar 2012 11:21:00 +0000

I’m from Brazil would like more details if possible to build trike for myself thank you for your attention

Comment on Bruce’s trike carrier by shaver

shaver — Tue, 13 Mar 2012 14:57:57 +0000

I (Bob Shaver)don’t make or sell those. Bruce Bunch makes them when he feels like it. You would have to ask him. If he didn’t want to make one, he might give you plans or dimensions.

Comment on Bruce’s trike carrier by Paul

Paul — Tue, 13 Mar 2012 14:24:30 +0000

Do you sell these? I have been looking for one for our two trikes Ice T and Terra Trike Cruiser.

Comment on Gus Duncan’s Woodies! by Jesse

Jesse — Fri, 09 Mar 2012 13:33:24 +0000

Will have to come check out your workshop sometime Gus. I was very impressed with the wood frame bike you were riding on Thursday morning.

Comment on A Bad Case of Drillium! by shaver

shaver — Tue, 06 Mar 2012 21:57:04 +0000

Very cool! I had a friend who was an extremely strong cyclist, who broke off an undrilled crank arm once and crashed. 26 pounds with tools and kit sounds wonderful!

Comment on A Bad Case of Drillium! by Bruce Bunch (trikebldr)

Bruce Bunch (trikebldr) — Tue, 06 Mar 2012 20:03:55 +0000

Today is march 6, 2012, and HS is fast approaching 3 years old, with no cracks or problems. I weigh between 210 and 220lbs, and quite often do stoppies and bicycle this trike just for kicks! I also pull a dog trailer behind it with a total weight, with dog, of 55 lbs.
Grant, de-burred holes don’t create stress points; they stop stress crack lines, as at the end of the slot in a frame where the boom inserts. If a hole isn’t correctly de-burred, the burr can create a stress point. De-burring is extremely time consuming, and most folks won’t spend the time to do it right.
90% of the holes and metal removal on this trike was done per computer stress flow diagrams showing where it was overbuilt and where to avoid. The philosophy is that DF’s are built using butted and double butted tubing to save frame weight, but trikes are built using simple, straight-walled structural tubing, so there are areas where their wall thickness is excessive.
Truvativ Elita cranks (at least of the vintage that are on HS!) have a dog-bone cross section, with the bulk of their mass along the edges of the arms. This leaves a lot of material down the middle that can be removed, especially in smaller circular holes, not slots. I can lock my brakes and mash my pedals hard enough to spin my rear wheel on clean pavement without the cranks arms breaking. I have also stomped on them a hard as I can. No breakage. (I did bend the spindle of one of my chromoly Frog pedals doing these tests!) Yes, drilled cranks have broken in the past! So have stock cranks, and over-drilled cranks!
This trike was not simply attacked with a drill as most cyclists did intuitively, but blindly, back in the old days! It was analysed first by a computer that controls a building’s earthquake equipment after sampling thousands of stress points. This is far beyond SolidWorks stuff! However, on some smaller parts, like the brake levers and shifters, I did take liberties, knowing they would not cost much to replace if they did fail.
It was predicted to even fold up around my ears by some on the forums, but after almost three years and some rougher roads, I think it has shown to be a total success!
I will disclose one part that I would do differently, though. I wouldn’t drill completely through the “peace” ribs inside the boom next time! I get roughly twice the flex from my boom as an undrilled version. I would probably use a boom without the “peace” ribs inside to begin with. Nobody, except Catrike, uses this extrusion, and they don’t have the problems it was implemented to solve.
The trike does now weigh 26lbs, 3oz, but with 2 frame bags full of tools and tubes, and bottle cages, mirrors, headrest, trailer hitch and newer, heavier Stelvios. The 24lbs is in stripped, race trim.

Comment on The MASA Slingshot, by Trikebldr by Shannon

Shannon — Wed, 22 Feb 2012 21:09:34 +0000

I am trying to get information on a Masa Mobile I – can anyone help me out?

Comment on Removing / Replacing cartridge bearings in Rear Wheels, by Trikebldr by Ceramic Bearings for Catrike Front Hubs | Bicycle Technology and Patents

Ceramic Bearings for Catrike Front Hubs | Bicycle Technology and Patents — Thu, 16 Feb 2012 04:15:13 +0000

[...] Replacing the Rear Wheel Bearings on a Catrike [...]