YZ450FX tires

The OE tire sizes for the Yamaha YZ450FX (2018–present) are 80/100-21 front / 120/90-18 rear. Below are tires in these sizes, compared across brands. OE rim widths are F1.60 / R2.15 (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.

Original equipment tires and recommended pressure

Changed to GEOMAX AT82 front and rear for 2027. Pressure is from the 2022 manual; adjust for conditions.

May differ by model year, market or batch. Pressures are cold values. Always check the label on the bike and the owner's manual. Sources (manufacturer): [1] [2] [3]

→ Open this bike in the chart (filter and sort there)

Tires that cover front and rear (45 models)

Front + rear set: 45 models can cover both ends (matching sizes in bold, based on F=80/100-21 / R=120/90-18). 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.

Front 80/100-21 options (83 total, 45 of them listed in the set section above)

Size 80/100-21: 35 exact, 43 in the same group, 5 narrower. 5 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.

Rear 120/90-18 options (49 total, 45 of them listed in the set section above)

Size 120/90-18: 24 exact, 8 in the same group, 17 narrower. 5 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.

See also

Bikes with the same OE sizes, front and rear

• Kawasaki KX450FX
• Yamaha WR450F

• All Yamaha models (OE sizes)
• Find forest roads: Forest road map of Japan (location and length, in Japanese)

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.