The OE tire sizes for the BMW F 450 GS (2026–present) are 100/90-19 front / 130/80-17 rear. Below are tires in these sizes, compared across brands. OE rim widths are F2.50 / R3.50 (from official specs; used for the rim-width check). OE sizes can differ by model year and market — the sidewall of your own bike is the sure reference. This is a Japanese-market lineup; the sizes themselves are international.
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Tires that cover front and rear (5 models)
Front + rear set: 5 models can cover both ends (matching sizes in bold, based on F=100/90-19 / R=130/80-17). Shop links search on the model name alone. “Narrower” means one or two steps below the OE size. “Rim width OK” means the tire maker’s published rim widths line up with the OE rim width. No badge means we could not confirm it; combinations we found to be wrong are left out entirely.
IRC puts asphalt first here: “grip and water dispersal built around riding on pavement.” For keeping the dirt-bike look while riding mostly on the road.
Sizes: F 100/90-19, 80/100-19, 2.75-21, 3.00-21, 80/100-21 / R 120/90-16, 130/80-17, 120/80-18, 4.10-18, 4.60-18
Where to buy
Continental’s long-standing “rides the street, rides the dirt” tire, at a 50:50 split. Its official PDF states it is OE on the KTM 690 Enduro R, the Husqvarna 701 Enduro and the Triumph TF 450-E. The big knobs bite hard in dirt and wear accordingly. Unusually for the class it goes down to 21-inch tube sizes (2.50-21 to 3.00-21). From 2026 the second-generation TKC 80² is sold alongside it, so check which one you are buying.
Sizes: F 120/70-17, 100/90-19, 110/80B19, 120/70-19, 2.50-21, 2.75-21, 80/90-21, 3.00-21, 90/90-21 / R 120/90-17, 130/80-17, 5.10-17, 140/80-17, 150/70B17, 170/60B17, 180/55B17, 3.25-18, 3.50-18, 4.00-18, 4.10-18, 110/80-18, 120/90-18, 140/80-18, 150/70B18
Where to buy
Pirelli’s pitch is an on/off touring tire that “combines traction on dirt with stability on pavement.” Knobby to look at, road-leaning to ride.
Sizes: F 110/80-14, 110/70R17, 120/70R17, 110/80R18, 120/70R18, 100/90-19, 110/80R19, 120/70R19, 90/90-21 / R 130/70-13, 160/60R15, 120/90-17, 130/80R17, 140/80R17, 150/60R17, 150/70R17, 170/60R17, 180/55R17, 140/70R18, 150/70R18
Where to buy
Bridgestone describes “an off-road-leaning adventure tire refined for rough-road ability and durability.” 24 sizes in all, which is a wide net. Street legal.
Sizes: F 100/90-18, 100/90-19, 110/80B19, 120/70B19, 90/100-19, 2.75-21, 3.00-21, 80/100-21, 90/90-21 / R 120/90-16, 120/90-17, 130/80-17, 130/80B17, 140/80B17, 150/70B17, 170/60B17, 4.60-17, 120/80-18, 120/90-18, 130/80-18, 150/70B18, 4.00-18, 4.10-18, 4.60-18
Where to buy
The predecessor to the Anakee Adventure 2. Still in the 2026 catalogue alongside it, and it holds sizes the 2 does not — 130/80R17, 140/80R17, 160/60R17, 100/90-19 among them.
Sizes: F 120/70R17, 110/80R18, 100/90-19, 110/80R19, 120/70R19, 90/90-21 / R 130/80R17, 140/80R17, 150/70R17, 160/60R17, 170/60R17, 180/55R17, 150/70R18
Where to buy
Front 100/90-19 options (6 total, 5 of them listed in the set section above)
Size 100/90-19: 6 exact, 0 in the same group. 6 with no size data on file are out of scope. Shop links carry each tire’s own matching size.
Dunlop traces it “straight from US dirt-track racing,” for “trackers and customs, on dirt and in town.”
Sizes: F 120/80-12, 100/90-19, 3.00-21 / R 120/90-10, 130/90-10, 100/90-12, 120/80-12, 130/80-12, 180/80-14, 120/90-18, 130/80-18
Where to buy
Rear 130/80-17 options (14 total, 5 of them listed in the set section above)
Size 130/80-17: 10 exact, 3 in the same group, 1 narrower. 2 left out for not fitting the OE rim width. 6 with no size data on file are out of scope. Shop links carry each tire’s own matching size. “Narrower” means one or two steps below the OE size. “Rim width OK” means the tire maker’s published rim widths line up with the OE rim width. No badge means we could not confirm it; combinations we found to be wrong are left out entirely.
GP-21 front, GP-22 rear. IRC calls it an all-rounder “covering the range of surfaces you expect on a forest-road tour.”
Sizes: F 110/80-17, 70/100-19, 2.75-21, 3.00-21, 80/100-21 / R 120/90-16, 90/100-16, 130/80-17, 140/70-17, 4.60-17, 120/80-18, 4.10-18
Where to buy
A trail tire in the F21 / R17 layout. Dunlop’s own description is brief.
Sizes: F 90/90-21 / R 120/80-17, 130/80-17
Where to buy
Bridgestone’s pitch is “looks and function for a scrambler’s feet, with enough on-road performance.” Appearance-first, road-leaning.
Sizes: F 130/80-18 / R 180/80-14, 130/80-17
Where to buy
Bridgestone’s line is “adventure that starts in town.” The pattern is knobby, but their own recommendation is for “customers who enjoy on-road touring on adventure machines” — between the dirt-leaning AX41 and the road-leaning A41. Built around wet traction and braking. Where the sidewall is marked “USE TUBE ON TUBE TYPE RIM,” it can be fitted to a tube-type rim with a suitable tube.
Sizes: F 110/80R19, 120/70R19, 90/90-21 / R 130/80R17, 150/70R17, 170/60R17, 150/70R18
Where to buy
A knobby adventure tire, and the usual answer for taking a big ADV bike onto dirt.
Sizes: F 110/80R19, 120/70R19, 80/90-21, 90/90-21 / R 130/80-17, 140/80-17, 150/70R17, 170/60R17, 110/80-18, 120/80-18, 130/80-18, 140/80-18, 150/70R18
Where to buy
Pirelli describes an on/off knobby “for dunes, gravel and cross-country through to asphalt.” Street legal, and the standard answer for serious dirt on a road-legal tire.
Sizes: F 80/90-21, 90/90-21 / R 120/90-17, 130/90-17, 110/80-18, 120/80-18, 120/90-18, 140/80-18
Where to buy
Pirelli describes a knobby on/off tire “optimised for road use on enduro machines while keeping off-road ability.”
Sizes: F 90/90-21 / R 120/90-17
Where to buy
Pirelli covers “daily use in town through to weekend adventure,” on and off pavement, across all displacements.
Sizes: F 110/80-18, 80/90-21, 90/90-21 / R 120/90-17, 110/80-18, 120/80-18, 140/80-18, 150/70R18
Where to buy
Pirelli claims “peak performance on soft to mid-soft ground — mud, sand, grass, dry dirt.” A revised New MX32 Mid-Soft is sold alongside it. Competition only (NHS).
Sizes: F 2.50-10, 60/100-12, 60/100-14, 80/100-14, 70/100-17, 70/100-19, 80/100-21 / R 2.75-10, 80/100-12, 90/100-14, 90/100-16, 110/90-17, 100/90-19, 70/100-19
Where to buy
How to read this
- The 1–5 ratings are our own estimates. Not manufacturer figures, not measurements.
- Within one model, character and street legality both change with the size and the spec. Confirm with the manufacturer or a dealer before you buy.
- Shop links go to search results rather than product pages. Other sizes and older models will be mixed in.
- “Narrower” means one or two steps below the OE size. The “rim width OK” badge means the tire maker's published rim widths line up with the OE rim width; no badge means unconfirmed.
- Competition tires may not be used on public roads.