pneumatictyre

On a bicycle made for three

from National Library of Ireland on The Commons

• 40 older comments, and then…
• derangedlemur said:

  I got a book about bicycling in victorian Ireland for Christmas. I may be the fount of all knowledge on this photo in a week or two when I get time to read it.

• National Library of Ireland on The Commons said:

  derangedlemur We'll await developments then! :D

• derangedlemur said:

  Interesting gearing ratio on the Tridem (or whatever it's called). If the first two guys don't pedal the third guy's going to have a hard time of it.

• John Spooner said:

  Usually known nowadays as a triplet. They were often used for pacing riding on solos. Three can go faster than 1 (3 times the power, but much less than 3 times the wind resistance). The rider being paced would stay as close behind the triplet as possible to maximise the aerodynamic advantage. They disappeared when motorcycles appeared on the scene. Nowadays 75cc 'Dernys' are used, although I've seen big 750cc brutes used on outdoor tracks. Triplet being used for pacing

• John Spooner said:

  I was given the chance to ride 1200 km on this triplet , but turned down the offer. The three of them made their own way to the start, and had never ridden the machine together before. It has a lot of extra ironmongery* to make the frame stiffer, but was still very 'bendy', according to Steve, who took 'my' place at the back. *The one in the picture has a double top-tube (crossbar).