2021 Triumph Bonneville Bobber Specifications

Name: 2021 Triumph Bonneville Bobber
Brand: Triumph

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2021 Triumph Bonneville Bobber Overview

The 2021 Triumph Bonneville Bobber is a naked bike motorcycle built around 1198 cc of displacement. Under the tank sits a Four stoke, parallel twin, 270° crank angle, SOHC, 4 valve per cylinder engine, a compression ratio of 10.0:1. 2021 Triumph Bonneville Bobber delivers 57.5 kW @ 6100 rpm of peak power and 106 Nm @ 4000 rpm of torque. From a practical standpoint, the 2021 Bonneville Bobber tips the scales at 251 kg, carries a 12-litre fuel tank, offers a seat height of 690 - 700 mm and spans a 1500 mm wheelbase. Scroll down for the complete 2021 Triumph Bonneville Bobber spec sheet covering every technical detail from suspension travel to tyre sizes.

2021 Bonneville Bobber - Pros & Cons

Strengths

Strong power output: 2021 Triumph Bonneville Bobber makes 57.5 kW @ 6100 rpm with 106 Nm @ 4000 rpm of torque - competitive figures for its class.
Accessible seat height: At 690 - 700 mm, the seat height is approachable for a wide range of rider heights and builds confidence in low-speed manoeuvring.

Considerations

Modest fuel capacity: The 12-litre tank means more frequent fuel stops on longer rides, which is worth planning around on touring routes.

Owner Experiences & Common Issues

Low-speed confidence

At 251 kg, the Bonneville Bobber is a substantial machine. New owners occasionally mention that slow-speed manoeuvring in car parks takes a little getting used to. Once moving, the weight disappears - but practising slow-speed exercises builds confidence quickly.

Bonneville Bobber - Buying & Maintenance Guide

What to check before buying

When inspecting a used 2021 Triumph Bonneville Bobber, start with the basics: check the service book for oil change frequency, inspect the chain and sprockets for wear, and look for oil seepage around the engine casings and rocker covers. A cold start test is invaluable - a well-maintained Bonneville Bobber should fire up cleanly and settle to a smooth idle within a few seconds.

Oil and filter changes

Regular oil changes are the single most important maintenance task on any Bonneville Bobber. Stick to the manufacturer's interval - typically every 6,000 km or once a year, whichever comes first. Always use the correct viscosity grade as specified in the owner's manual.

2021 Triumph Bonneville Bobber - Frequently Asked Questions

What engine does the 2021 Triumph Bonneville Bobber have?

The 2021 Triumph Bonneville Bobber uses a Four stoke, parallel twin, 270° crank angle, SOHC, 4 valve per cylinder engine with 1198 cc of displacement. It is liquid cooled.

How much does the 2021 Triumph Bonneville Bobber weigh?

The 2021 Triumph Bonneville Bobber weighs 251 kg. This is the manufacturer's wet figure.

How much power does the 2021 Triumph Bonneville Bobber make?

The 2021 Triumph Bonneville Bobber produces 57.5 kW @ 6100 rpm of power and 106 Nm @ 4000 rpm of torque. These are peak figures.

What is the fuel tank capacity of the 2021 Triumph Bonneville Bobber?

The 2021 Triumph Bonneville Bobber has a 12-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 200-240 km between stops.

Is the 2021 Triumph Bonneville Bobber suitable for shorter riders?

The 2021 Triumph Bonneville Bobber has a seat height of 690 - 700 mm. This is a comfortable, accessible height for most riders.

What brakes does the 2021 Triumph Bonneville Bobber have?

The 2021 Triumph Bonneville Bobber uses 2x 310mm disc, Brembo 2-piston sliding axial calipers at the front and Single 255mm disc, Nissin single piston sliding axial caliper at the rear.

What tyre sizes does the 2021 Triumph Bonneville Bobber use?

The 2021 Triumph Bonneville Bobber runs 130/90 B16 front and 150/80 R16 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What gearbox does the 2021 Triumph Bonneville Bobber have?

The 2021 Triumph Bonneville Bobber is fitted with a 6-Speed transmission.

Triumph Bonneville Bobber Spec Evolution

The Triumph Bonneville Bobber was produced across 4 model years (2018-2026). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification	2018	2020	2021	2026
Max Power	57.4 kW / 77 hp @ 6550 rpm	57.4 kW / 77 hp @ 6550 rpm	57.5 kW / 76.9 hp @ 6100 rpm	57.5 kW / 76.9 hp @ 6100 rpm
Engine Detail	Four stoke, parallel twin, 270o crank, SOHC	Four stoke, parallel twin, 270o crank, SOHC	Four stoke, parallel twin, 270° crank angle, SOHC, 4 valve per cylinder	Four stoke, parallel twin, 270° crank angle, SOHC, 4 valve per cylinder
Seat Height	690 mm / 27.2 in	690 mm / 27.2 in	690 - 700 mm / 27.2 - 27.6 in	683 mm / 26.9 in
Fuel Capacity	10.6 Litres / 2.8 US gal / 3.2 Imp gal	10.6 Litres / 2.8 US gal / 3.2 Imp gal	12 Litres / 3.2 US gal	14 Litres / 3.7 US gal
Frame Type	Dual tubular steel cradle	Dual tubular steel cradle	Tubular steel, twin cradle frame	Tubular steel, twin cradle frame
Wheelbase	1510 mm / 59.4 in	1510 mm / 59.4 in	1500 mm / 59.1 in	1486 mm / 58.5 in
Brakes - Front	Single 310 mm disc, 2 piston floating Nissen calipers, ABS	Single 310 mm disc, 2 piston floating Nissen calipers, ABS	2x 310mm disc, Brembo 2-piston sliding axial calipers	2x 310mm disc, Brembo 2-piston sliding axial calipers
Brakes - Rear	Single 255 mm disc, 2 piston floating Nissen caliper, ABS	Single 255 mm disc, 2 piston floating Nissen caliper, ABS	Single 255mm disc, Nissin single piston sliding axial caliper	Single 255mm disc, Nissin single piston sliding axial caliper OCABS