2018 Triumph Bonneville Speedmaster Specifications

Name: 2018 Triumph Bonneville Speedmaster
Brand: Triumph

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2018 Triumph Bonneville Speedmaster Overview

The 2018 Triumph Bonneville Speedmaster is a custom / cruiser motorcycle built around 1198 cc of displacement. Under the tank sits a Four stoke, parallel twin, 270o crank, SOHC engine, a compression ratio of 10.0:1. 2018 Triumph Bonneville Speedmaster delivers 57.4 kW @ 6550 rpm of peak power and 106 Nm @ 3100 rpm of torque. From a practical standpoint, the 2018 Bonneville Speedmaster tips the scales at 245.5kg, carries a 12-litre fuel tank and offers a seat height of 705 mm. Scroll down for the complete 2018 Triumph Bonneville Speedmaster spec sheet covering every technical detail from suspension travel to tyre sizes.

2018 Bonneville Speedmaster - Pros & Cons

Strengths

Strong power output: 2018 Triumph Bonneville Speedmaster makes 57.4 kW @ 6550 rpm with 106 Nm @ 3100 rpm of torque - competitive figures for its class.
Accessible seat height: At 705 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

General ownership notes

The 2018 Triumph Bonneville Speedmaster has built a reputation for solid everyday reliability when serviced to schedule. As with any motorcycle of this era, documented service history is the single biggest indicator of long-term reliability when buying used.

Bonneville Speedmaster - Buying & Maintenance Guide

What to check before buying

When inspecting a used 2018 Triumph Bonneville Speedmaster, 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 Speedmaster 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 Speedmaster. 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.

2018 Triumph Bonneville Speedmaster - Frequently Asked Questions

What engine does the 2018 Triumph Bonneville Speedmaster have?

The 2018 Triumph Bonneville Speedmaster uses a Four stoke, parallel twin, 270o crank, SOHC engine with 1198 cc of displacement. It is liquid cooled.

How much does the 2018 Triumph Bonneville Speedmaster weigh?

The 2018 Triumph Bonneville Speedmaster weighs 245.5kg. This is the manufacturer's dry figure.

How much power does the 2018 Triumph Bonneville Speedmaster make?

The 2018 Triumph Bonneville Speedmaster produces 57.4 kW @ 6550 rpm of power and 106 Nm @ 3100 rpm of torque. These are peak figures.

What is the fuel tank capacity of the 2018 Triumph Bonneville Speedmaster?

The 2018 Triumph Bonneville Speedmaster has a 12-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 200-240 km between stops.

Is the 2018 Triumph Bonneville Speedmaster suitable for shorter riders?

The 2018 Triumph Bonneville Speedmaster has a seat height of 705 mm. This is a comfortable, accessible height for most riders.

What brakes does the 2018 Triumph Bonneville Speedmaster have?

The 2018 Triumph Bonneville Speedmaster uses 2 x 310 mm Disc, 2 piston calipers, ABS at the front and Single 255 mm disc, 2 piston caliper, ABS at the rear.

What tyre sizes does the 2018 Triumph Bonneville Speedmaster use?

The 2018 Triumph Bonneville Speedmaster runs 130/90-16 front and 150/80-16 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What gearbox does the 2018 Triumph Bonneville Speedmaster have?

The 2018 Triumph Bonneville Speedmaster is fitted with a 6-Speed transmission.

Triumph Bonneville Speedmaster Spec Evolution

The Triumph Bonneville Speedmaster 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 @ 6000 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	705 mm / 27.7 in	705 mm / 27.7 in	705 mm / 27.8 in	705 mm / 27.8 in
Fuel Capacity	12 Litres / 3.17 US gal	12 Litres / 3.17 US gal	12 Litres / 3.2 US gal	14 Litres / 3.7 US gal
Displacement	1198 cc / 73.1 cu in	1198 cc / 73.1 cu in	1198 cc / 73.1 cu in	1198 cc / 73.1 cu-in
Frame Type	Dual tubular steel cradle	Dual tubular steel cradle	Tubular steel, twin cradle frame	Tubular steel, twin cradle frame
Brakes - Front	2 x 310 mm Disc, 2 piston calipers, ABS	2 x 310 mm Disc, 2 piston calipers, ABS	2 x 310mm disc, Brembo 2-piston sliding axial calipers	2 x 310mm disc, Brembo 2-piston floating calipers, OCABS
Brakes - Rear	Single 255 mm disc, 2 piston caliper, ABS	Single 255 mm disc, 2 piston caliper, ABS	Single 255mm disc, Nissin single piston sliding axial caliper	Single 255mm disc, Nissin single piston sliding caliper, OCABS