Speed Twin 900 tires

The OE tire sizes for the Triumph Speed Twin 900 (current as of Aug 2026) are 100/90-18 front / 150/70R17 rear. Below are tires in these sizes, compared across brands. OE rim widths are F2.75 / R4.25 (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.

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

Tires that cover front and rear (10 models)

Front + rear set: 10 models can cover both ends (matching sizes in bold, based on F=100/90-18 / R=150/70R17). Shop links search on the model name alone.

Front 100/90-18 options (27 total, 10 of them listed in the set section above)

Size 100/90-18: 11 exact, 16 in the same group. Shop links carry each tire’s own matching size.

Rear 150/70R17 options (18 total, 10 of them listed in the set section above)

Size 150/70-17: 18 exact, 0 in the same group. Shop links carry each tire’s own matching size.

See also

Bikes with the same OE sizes, front and rear

• Triumph Bonneville T40 / T40 Black
• Triumph Bonneville T100
• Triumph Bonneville T120 / T120 Black
• Royal Enfield Shotgun 650

• All Triumph models (OE sizes)

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.