2016-02-23 (Tu) Simple Recumbent Bike Without Welding

All clamps had been lost so measurements were taken to replace them. Measurements were taken from the widest part of the bike frame. A second measurement was taken on the salvaged frame to find the diameter of pipe which was smaller. In order to the correct size of clamps at the hardware store some analogs were found around the apartment which had approximately the same diameter. An empty roll of clear plastic tape had almost the exact same diameter as the large bike tube. Some scrap ¾” wooden dowels had the same diameter as the other bike frame part. These analogs made it easy to find the correct clamp sizes at the hardware store.

Measuring top bar of frame

Measuring support strut

Analogs and their corresponding clamps

Four large clamps, 1” IPS, were purchased and some ¾” single hole straps with rubber padding were bought as a pair. All four IPS clamps were opened and the side without a hanger socket was discarded. The hanger socket was a 3/8” threaded hole and also had threaded holes on the wings. These four halves were assembled into two clamps with a hanger socket on each side and put on the bike frame.

Clamps on bike, left side

Clamps on bike, right side

Hopefully the clamps closest to the seat will connect with the salvaged frame’s wheel slots and hold it securely. The clamps closest to the handlebars should connect to the single hole straps which will hold the smaller pipe on each side. Clamp locations shown are not final. The position of the pedals will have to be measured when the seat is attached and adjusted for leg length.

Position of second bike parts

To do:
  • Buy 3/8” bolts
  • Attach and adjust seat
  • Attach bike frames together
    • Adjust length to suit legs
    • Add longer bolts to touch frame
    • Threaded rod and acorn nuts?
    • Cut threads from one side of each clamp half?
  • Remove cranks from lower bike
  • Run chain between cranks and wheel
  • Construct idler sprocket
  • Test
  • Strip pink paint
  • Repaint

The rest of the posts for this project have been arranged by date.

First time here?

Completed projects from year 1.
Completed projects from year 2

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2016-02-16 (Tu)