2026 Triumph Bonneville Speedmaster vs 2025 BMW R 12G/S

Full specifications comparison • 2 motorcycles

Comparing 2 motorcycles
2026 Triumph Bonneville Speedmaster 2026 Triumph Bonneville Speedmaster

Custom / cruiser

Engine
Four stoke, parallel twin, 270° crank angle, SOHC, 4 valve per cylinder
Power
57.5 kW / 76.9 hp @ 6000 rpm
Top Speed
N/A
Weight
263 kg / 580 lbs
2025 BMW R 12G/S 2025 BMW R 12G/S

Custom / cruiser

Engine
Four stroke, two cylinder horizontally opposed Boxer, with four camshaft-operated valves and two overhead camshafts per cylinder.
Power
81 kW / 109 hp @ 7000 rpm
Top Speed
N/A
Weight
229 kg / 505 lbs
Full Specifications
General
Year20262025
Make ModelTriumph Bonneville SpeedmasterBMW R 12G/S
Dimensions
Seat Height705 mm / 27.8 in860 mm / 33.9 in (875 mm / 34.4 in Enduro Package)
Wheelbase1500 mm / 59.1 in1580 mm / 62.2 in (1585 / 62.4 in Enduro Package)
Height1055 mm /41.5 in-
Length2220 mm / 87.4 in2200 mm / 86.6 in
Width910 mm / 35.8 in830 mm / 32.7 in
Weights & Capacities
Fuel Capacity14 Litres / 3.7 US gal15.5 Litres / 4.1 US gal
Wet Weight263 kg / 580 lbs229 kg / 505 lbs
Performance
Max Power57.5 kW / 76.9 hp @ 6000 rpm81 kW / 109 hp @ 7000 rpm
Max Torque106 Nm / 78.2 lb-ft @ 3750 rpm115 Nm / 81 lb-ft @ 6500 rpm
Engine
Displacement1198 cc / 73.1 cu-in1170 cc / 71.4 cub in
Engine DetailFour stoke, parallel twin, 270° crank angle, SOHC, 4 valve per cylinderFour stroke, two cylinder horizontally opposed Boxer, with four camshaft-operated valves and two overhead camshafts per cylinder.
Bore x Stroke97.6 x 80 mm101 x 73 mm
Compression Ratio10.0:112:1
Cooling SystemLiquid cooledAir/oil cooled
EmissionsEuro 5+Controlled 3-way catalytic converter, exhaust emission standards EU-5+
ExhaustChromed stainless steel 2 into 2 twin-skin exhaust system with chromed stainless silencers-
Fuel InductionElectronic fuel injection with electronic throttle control. 2 riding modes (Road, Rain)Electronic intake pipe injection / digital engine management system: BMS-O with throttle-by-wire
Fuel Type-Unleaded super (premium), octane number 95-98 (RON) (rated output at 98 RON)
IgnitionDigital-
LubricationWet sumpWet sump
Starter-Electric
Drivetrain
ClutchWet, multi-plate, slip & assistSingle dry plate clutch, hydraulically operated
Final DriveX-ring chainUniversal shaft
Gear Ratios-1st = 2.375, 2nd = 1.696, 3rd = 1.296, 4th = 1.065, 5th = 0.939, 6th = 0.848
Primary Drive Ratios-1.737
Transmission / Drive6-Speed6-Speed, claw-shifted transmission with separate transmission housing
Chassis
Frame TypeTubular steel, twin cradle frameFour-part frame concept with front frame and three-part rear frame, load-bearing engine-gearbox unit, rear-seat frame removeable for one-up riding
Suspension - Front47 mm Showa cartridge forks45 mm USD telescopic forks, spring base, rebound and compression damping adjustable
Suspension - RearKYB Mono-shock RSU with linkage and preload adjustmentAluminum Paralever swinging arm, directly linked WAD spring strut, spring base, rebound and compression damping adjustable
Rake25.3°-
Steering Head Angle-63.1° (63.2° Enduro Package)
SwingarmTwin sided tubular steel-
Trail91.4 mm / 3.6 in120.8 mm / 4.76 in (121.3 / 4.76 Enduro Package)
Wheel Travel - Front-210 mm / 8.3 in
Wheel Travel - Rear-200 mm / 7.9 in
Wheels & Brakes
Brakes - Front2 x 310mm disc, Brembo 2-piston floating calipers, OCABS2 x 310mm disc brake, with two axially bolted 2-piston floating calipers
Brakes - RearSingle 255mm disc, Nissin single piston sliding caliper, OCABSSingle 265 mm disc, 2 piston floating caliper
ABSStandardBMW Motorrad ABS Pro (lean angle optimised)
Rims - Front-2.15 x 21
Rims - Rear-4.0 x 17 (4.0 x 18 Enduro Package)
Tyres - Front130/90-1690/90/21
Tyres - Rear150/80-16150/70 - R17 (150/70 - R18 Enduro Package)
Wheels-Aluminium cross-spoke wheels
Wheels - FrontWire 32-spoke, 16 x 2.5 in-
Wheels - RearWire 32-spoke, 16 x 3.5 in-

Verdict

Winner on specs

2025 BMW R 12G/S

The 2025 BMW R 12G/S edges out the 2026 Triumph Bonneville Speedmaster thanks to its higher torque and lighter kerb weight. Specifications are one part of the picture - dealer support, parts availability, and intended use all matter too.

Key Differences

2026 Triumph Bonneville Speedmaster - Advantages

  • Lower seat height: 705 mm vs 860 mm - accessible to a wider range of rider heights.
  • Liquid cooling: Consistent engine temperature in stop-start traffic and hot climates.

2025 BMW R 12G/S - Advantages

  • Higher torque: 115 Nm vs 106 Nm - more pulling power across the rev range.
  • Lighter: 229 kg vs 263 kg - easier to handle and less fatiguing on long trips.

2026 Triumph Bonneville Speedmaster vs 2025 BMW R 12G/S - FAQs

What are the engine differences between the 2026 Triumph Bonneville Speedmaster and 2025 BMW R 12G/S?
The 2026 Triumph Bonneville Speedmaster uses Four stoke, parallel twin, 270° crank angle, SOHC, 4 valve per cylinder, while the 2025 BMW R 12G/S is powered by Four stroke, two cylinder horizontally opposed Boxer, with four camshaft-operated valves and two overhead camshafts per cylinder..
Which is lighter, the 2026 Triumph Bonneville Speedmaster or the 2025 BMW R 12G/S?
The 2025 BMW R 12G/S is lighter at 229 kg compared to 263 kg for the 2026 Triumph Bonneville Speedmaster - a difference of 34 kg. This is a meaningful difference that affects handling and rider fatigue.
Which bike is better for shorter riders, the 2026 Triumph Bonneville Speedmaster or the 2025 BMW R 12G/S?
The 2026 Triumph Bonneville Speedmaster has the lower seat at 705 mm, making it more accessible. The 2025 BMW R 12G/S sits higher at 860 mm. A seat height below 800 mm suits most riders; above 820 mm shorter riders may need to tiptoe.
Which should I buy, the 2026 Triumph Bonneville Speedmaster or the 2025 BMW R 12G/S?
Both are strong choices. The 2026 Triumph Bonneville Speedmaster has the edge in lower seat height and liquid cooling, while the 2025 BMW R 12G/S stands out for higher torque and lighter kerb weight. Visit dealers, arrange test rides, and factor in local parts and service costs - these often matter as much as the spec sheet.