| MODEL | BSA C15T TRIALS 1959 - 1965 |
| Year | 1959 - 1965 |
| Engine Type | Single cylinder, four-stroke, OHV |
| Displacement / Capacity | 249 cc |
| Bore X Stroke | 67 mm x 70 mm |
| Compression Ratio | 8.0:1 |
| Cooling System | Air |
| Max Power | 11 kW / 15 hp @ 5000 rpm |
| Max Torque | — |
| Ignition | — |
| Induction | Amal carburettor |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4-speed |
| Clutch | 4 friction plates |
| Final Drive | Chain, 123 pitches |
| CHASSIS SPECS | |
| Frame | Single loop, twin rails under engine |
| Front Suspension | Telescopic |
| Rear Suspension | Pivoted fork |
| Front Brakes | 6.5 in drum |
| Rear Brakes | 6.5 in drum |
| DIMENSION SPECS | |
| Overall Length | 2045 mm / 80.5 in |
| Overall Width | 800 mm / 31.5 in |
| Overall Height | 1067 mm / 42 in |
| Seat Height | 838 mm / 33 in |
| Wheelbase | 1314 mm / 51.75 in |
| Ground Clearance | 191 mm / 7.5 in |
| Dry Weight | 120 kg / 265 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.00 x 20 in |
| Rear Tyre | 4.00 x 18 in |
| FUEL SYSTEM | |
| Fuel Capacity | 9.4 Litres / 2.5 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The trials derivative of the C15, with a 20 inch front wheel, a higher-clearance competition frame, a high-level exhaust and very low gearing for slow observed sections. It was lighter than the road bike and could be fitted with lights for road use.
