The Ariel HT3 is a Trial.
Stopping was achieved via Drum in the front and a Drum in the rear.
1954 - 1959 Ariel HT3
Ariel earned its fame with its HT trial bikes of 350cc and 500cc, which saw the light in 1954. The HT3 had a 350cc, while the HT5 had a 500cc engine.