TRIUMPH ROCKET 111 ROADSTER
The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.
“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.
Pass rate over time
The ROCKET 111 ROADSTER's first-time pass rate has held steady since 2013 (91.5% → 92.3%).
Pass rate by mileage
A low-mileage ROCKET 111 ROADSTER passes first time 92.5% of the time; by 40k that's 94.1%.
First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.
What fails on a ROCKET 111 ROADSTER
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| brakes |
|
55 | 27.5 | 0.4× |
| lamps and reflectors |
|
38 | 19 | 0.7× |
| tyres and wheels |
|
28 | 14 | 0.5× |
| tyres |
|
24 | 12 | 1.2× |
| lighting and signalling |
|
15 | 7.5 | 0.1× |
| Identification of the vehicle |
|
14 | 7 | 2.3× |
| structure and attachments |
|
11 | 5.5 | 0.4× |
| reg plates and vin |
|
6 | 3 | 0.3× |
| fuel and exhaust |
|
5 | 2.5 | 0.2× |
| suspension |
|
4 | 2 | 0.2× |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.
How rivals compare
On first-time pass rate the ROCKET 111 ROADSTER beats 3 of its 3 closest rivals (TRIUMPH ROCKET III, HARLEY-DAVIDSON FXSB, TRIUMPH ROCKET 111).
Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the ROCKET 111 ROADSTER.
Compare with any bike
More TRIUMPH models
Pass rate by registration year
Best year to buy used: 2012 (93.1% pass). Weakest: 2010 (89.5%).
First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.
TRIUMPH ROCKET 111 ROADSTER FAQ
Is the TRIUMPH ROCKET 111 ROADSTER reliable?
The TRIUMPH ROCKET 111 ROADSTER is more reliable than average for its class: 90.7% of its 2,642 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #748 of 5428 models.
What does a ROCKET 111 ROADSTER fail its MOT on most?
brakes — 28% of all defects recorded against failed ROCKET 111 ROADSTER tests.
What is the best year of ROCKET 111 ROADSTER to buy used?
By first-time pass rate, 2012-registered examples do best (93.1%) and 2010 worst (89.5%). Condition and history still trump the year.
How many miles will a ROCKET 111 ROADSTER last?
The median ROCKET 111 ROADSTER shows 12,447 miles at test, and examples around 40k miles still pass 94.1% of the time — mileage alone rarely kills one.
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