+ Add a photo

Supermotos

2021KTM 450 SMR

Rate this bike

41 fields on record

The 2021 KTM 450 SMR is a lightweight supermotard built for aggressive street riding and track enthusiasts seeking nimble handling and genuine performance. Powered by a potent 449cc liquid-cooled single-cylinder four-stroke with Brembo brakes and quality Suter clutch, it excels at rapid direction changes and accelerative fun on tarmac.

Capacity: 449.3 ccm
Engine: Single, four-stroke
Gearbox: 6-speed
Dry weight: 105.5 kg
Seat height: 960 mm
Power: 44.9 HP (33.0 kW)

⇄ Compare with another bike ＋ Add to garage All model years

What’s new for the 2021 KTM 450 SMR

vs the 2020

Spec	2020	2021
Dry weight	109.3 kg (241.0 pounds)	105.5 kg (232.6 pounds)
Wet weight	111.5 kg (245.8 pounds)	109.3 kg (241.0 pounds)
Seat height	927 mm (36.5 inches)	960 mm (37.8 inches)
Fuel capacity	7.50 litres (1.98 US gallons)	8.50 litres (2.25 US gallons)
Front suspension	WP Suspension Up Side Down 4860 MXMA CC	WP XACT-USD, Ø 48 mm
Rear suspension	WP Suspension 5018 BAVP DCC	WP XACT Monoshock with linkage
Front brakes	Single disc. Floating disc. Four-piston calipers. Radially mounted.	Single disc
Rear brakes	Single disc. Floating disc. Single-piston caliper.	Single disc
Wheelbase	1495 mm (58.9 inches)	1482 mm (58.3 inches)

Other years 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail20%

Cornering97%

City riding25%

Daily riding15%

Touring8%

Two-up5%

Track92%

Best for: It exists purely to carve up tight tarmac circuits and technical mixed-surface courses with razor-sharp direction changes, not to cover distance or haul gear.
Built for: Expect an explosive, visceral character with instant throttle response, flickable handling, and a chassis that thrives on aggressive lean angles and hard braking into corners.
Not ideal for: This bike is not for beginners, commuters, passengers, or anyone seeking comfort, wind protection, or long-distance touring capability.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

Worked out in your browser - nothing is sent to us

Your height

Inseam (optional)

Units

At 960mm, a rider of 68.9" with a 31" (estimated) inseam will not reach the ground comfortably on the 2021 KTM 450 SMR, with a stretched knee angle of around 180 degrees and a forward-leaning riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

Find bikes that fit your height →

Range and running costs

Worked out in your browser - nothing is sent to us

Units

Currency

Fuel per litre

Riding a year

Based on the maker's published fuel consumption and tank size. Real-world figures depend on how and where you ride, and the last litres of a tank are reserve. Prices shown greyed are examples - type your own.

Full specifications

Engine

Capacity: 449.3 ccm
Power: 44.9 HP (33.0 kW)
CO2 Emissions: 85 CO2 g/km
Engine type: Single, four-stroke
Fuel consumption: 3.70 litres/100 km (27.0 km/l)
Power/weight ratio: 0.4256 HP/kg (dry)
Bore x stroke: 95.0 x 63.4 mm
Compression: 12.5:1
Cooling system: Liquid
Fuel system: Injection
Starting: Electric
Ignition: Keihin EMS
Valves per cylinder: 4
Lubrication system: Forced oil lubrication with 2 oil pumps
Torque: Not on record - add it

Transmission

Gearbox: 6-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet multi-disc Suter clutch, Brembo hydraulics

Dimensions & weight

Wheelbase: 1482 mm
Overall width: 450 mm
Seat height: 960 mm
Dry weight: 105.5 kg
Wet weight: 109.3 kg
Fuel capacity: 8.50 litres
Ground clearance: 355 mm

Chassis & suspension

Frame: Central double-cradle-type 25CrMo4 steel
Front suspension: WP XACT-USD, Ø 48 mm
Rear suspension: WP XACT Monoshock with linkage
Front wheel travel: 300 mm
Rear wheel travel: 310 mm
Rake (fork angle): 26.5°
Trail: 119 mm

Brakes & wheels

Front brakes: Single disc
Front brakes diameter: 310 mm
Rear brakes: Single disc
Rear brakes diameter: 220 mm
Front tyre: 125/80-R20
Rear tyre: 170/55-R17

Other

Color options: Orange/white/black
Comments: Traction control

Specs last verified against published sources: October 2026.

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	2004	2010	2016	2021	2027
Capacity	449 cc	449 cc	449 cc	449 cc	450 cc
Dry weight	107 kg	109 kg	109 kg	106 kg	109 kg
Seat height	855 mm	920 mm	927 mm	960 mm	898 mm
Fuel capacity	7 L	8.2 L	7.5 L	8.5 L	7.2 L

Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.

Rider Reviews

—

☆☆☆☆☆

Be the first to rate

MotorcycleDB

The 2021 KTM 450 SMR is a highly impressive motorcycle that offers top-notch performance and handling. With its powerful 450cc engine, lightweight chassis, and advanced suspension, this bike delivers an exhilarating riding experience. Whether you're tearing up the track or carving through tight city streets, the KTM 450 SMR provides exceptional agility and control. The sleek, modern design and high-quality components make this bike a standout choice for riders who demand the best in performance and style.

Overall, the 2021 KTM 450 SMR is a excellent choice for riders who want a high-performance motorcycle that can handle a variety of riding conditions. Its powerful engine and agile handling make it a top contender in the supermoto segment. With its superior performance and stylish design, the KTM 450 SMR is sure to impress any rider looking for a thrilling and capable motorcycle.

Own one? Add it to My Garage and write an owner review with an Owner badge.