Across the 1966 and 1967 model years, the Triumph Bonneville T120TT motorcycle has a listed dry weight of 363.8 lb (165 kg).
Triumph Bonneville T120TT weight overview
This is middleweight territory: substantial enough to feel planted, but still well short of heavyweight touring and large-cruiser mass. The comparison uses dry weight because a usable wet/running figure was not supplied, so the actual ready-to-ride motorcycle will be heavier.
Middleweight Motorcycle
How heavy is the Triumph Bonneville T120TT?
dry weight
Using a model-level dry weight comparison, the Triumph Bonneville T120TT is lighter than about 71.1% of 19 Triumph sport bikes with compatible weight data.
Dry weight
Bike + rider total weight
These totals use the model’s representative dry weight. They exclude riding gear, luggage and a passenger.
Triumph Bonneville T120TT weight & related specs
| Model years covered | 1966, 1967 |
|---|---|
| Dry weight | 363.8 lb (165 kg) |
| Engine displacement | 649 cc |
| Fuel capacity | 2.5 US gal (9.46 L) |
| Full-tank fuel weight (estimated) | 15.5 lb (7 kg) |
Weight changes by model year
Useful weight calculations
| Displacement per pound | 1.78 cc / lb |
|---|---|
| Weight per 100 cc | 56 lb / 100 cc |
| Fuel weight as % of bike weight | 4.3% |
| Weight with full tank | 379.3 lb (172 kg) |
What the weight numbers tell you
Triumph Bonneville T120TT weight FAQ
How much does the Triumph Bonneville T120TT weigh?
The source data gives 363.8 lb (165 kg) as dry weight. A fueled, road-ready bike will weigh more than this figure.
How does the Triumph Bonneville T120TT weight compare with similar Triumphs?
Relatively light. On a model-level comparison, it is lighter than about 71.1% of 19 Triumph sport bikes with the same weight basis.
Are all Triumph Bonneville T120TT model years the same weight?
The supplied comparable weight values do not show a meaningful change across the 1966-1967 years covered here.
What does a full tank of gas weigh on the Triumph Bonneville T120TT?
A full tank works out to about 15.5 lb (7 kg) from the listed 2.5 US gal (9.46 L) capacity. Actual fuel density varies slightly, so treat it as a practical estimate.
What does the Triumph Bonneville T120TT weigh with a 180 lb rider?
The approximate combined total is 543.8 lb (246.6 kg) with a 180 lb rider, based on the representative dry weight used on this page.
How much heavier will the Triumph Bonneville T120TT be than its dry weight?
Do not treat dry weight as curb weight. Adding the listed fuel capacity alone produces roughly 379.3 lb (172 kg); the true ready-to-ride figure can still differ because dry-weight definitions vary.
How much heavier is the Triumph Bonneville T120TT with a full tank?
The page calculates about 379.3 lb (172 kg) with a full tank by adding the listed fuel mass to the dry figure. Treat this as a practical estimate, not an official Triumph curb-weight number.
How large is the Triumph Bonneville T120TT engine for its weight?
The model has about 1.78 cc per lb in the available data. This simply shows how much engine displacement there is for each pound of motorcycle weight.
Is the Triumph Bonneville T120TT above or below the typical Triumph sport bike weight?
The representative dry weight is about 28.7 lb (13 kg) lighter than the median Triumph sport bike weight of 392.4 lb (178 kg) in this dataset.
Motorcycle specifications can vary by model year, market, equipment and the exact dry/curb-weight definition. Calculated fuel-weight and ratio figures on this page are estimates derived from the supplied specifications. Confirm critical figures in the owner’s manual or on the official Triumph Motorcycles website.