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Triumph Speed triple s vs Triumph Unknown: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Triumph Speed triple s
80%
MOT pass rate · 1 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph Speed triple s (80%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Triumph Speed triple s Triumph Unknown
MOT pass rate 80% 89% ✓
MOT failure rate 20% 11% ✓
Faults & advisories per test 0.6 0.6
Dangerous-fault share 0% ✓ 2%
Average mileage 18,178 mi 16,601 mi
Sample size (vehicles) 1 65,927

Most common faults

Triumph Speed triple s

  1. Exhaust noisy (8.1.1 (a))
  2. Rear Footrest missing pillion seat fitted no rear pegs (6.2.12 (a))
  3. Nearside Front Shock absorber has a light misting of oil (5.3.2 (b))

Triumph Unknown

  1. Exhaust noisy (8.1.1 (a))
  2. Exhaust noisy (7.1.2)
  3. Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d)
  4. COVID-19 6 MONTH EXTENSION
  5. Rear Tyre worn close to the legal limit (5.2.3 (e))
  6. Steering headbearing has slight free play (2.2.2)

Reliability FAQ

On MOT pass rate the Triumph Speed triple s (80%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph Speed triple s report Full Triumph Unknown report Most reliable cars

Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.