Triumph Bonneville T120 Black 2017 vs. Triumph Speed Twin 1200 2021

The Triumph Bonneville T120 Black 2017 and the Triumph Speed Twin 1200 2021 are both naked bikes from Triumph, but they have some notable differences in terms of specifications and features.

Starting with the engine and drive train, both bikes have an in-line crankpin offset engine type with a displacement of 1200cc. However, the Speed Twin 1200 2021 has a more powerful engine, producing 100 HP compared to the Bonneville T120 Black 2017's 80 HP. The Speed Twin also has a higher torque output of 112 Nm compared to the Bonneville's 105 Nm. Both bikes have a fuel injection system and liquid cooling.

In terms of suspension, the Bonneville T120 Black 2017 features a telescopic fork front suspension from Kayaba, while the Speed Twin 1200 2021 has an upside-down telescopic fork front suspension from Marzocchi. Both bikes have swing arm rear suspension with dual shocks and preload adjustment. However, the Speed Twin's rear suspension is made of aluminum, which may contribute to a lighter weight and potentially better performance.

Triumph Bonneville T120 Black 2017

Both bikes have a steel frame with a central tube design. The braking systems also differ slightly, with the Bonneville T120 Black 2017 featuring double disk brakes with a diameter of 310 mm and double piston calipers from Nissin. The Speed Twin 1200 2021, on the other hand, has larger double disk brakes with a diameter of 320 mm and four-piston calipers from Brembo.

In terms of advanced rider assistance systems, both bikes have ABS. However, the Speed Twin 1200 2021 offers additional features such as riding modes and traction control.

When it comes to dimensions and weights, the Bonneville T120 Black 2017 has a front tire width of 100 mm and a rear tire width of 150 mm, both with 18-inch and 17-inch diameters respectively. The bike has a wheelbase of 1450 mm, a seat height of 785 mm, and a fuel tank capacity of 15 liters.

Triumph Speed Twin 1200 2021

On the other hand, the Speed Twin 1200 2021 has a wider front tire width of 120 mm and a wider rear tire width of 160 mm, both with 17-inch diameters. The bike has a slightly shorter wheelbase of 1413 mm, a higher seat height of 809 mm, and a slightly smaller fuel tank capacity of 14.5 liters.

In terms of strengths, the Bonneville T120 Black 2017 is praised for its powerful engine with decent torque, comfortable seating position, good brakes, and wonderfully authentic look. On the other hand, the Speed Twin 1200 2021 is praised for its superb engine, quality workmanship and material feel, torque in every situation, playful handling, good chassis, and high-performance brakes.

However, the Bonneville T120 Black 2017 does have some weaknesses, including suspension that is only adjustable in spring preload at the rear and unnecessary performance modes. The Speed Twin 1200 2021 also has its weaknesses, such as strong heat development under the driver, being a little too petite for tall pilots, and having a large turning circle.