ブリヂストン BATTLAX BT-39SS: sizes and matching bikes
Type: Race ／ Street legal
About this tire
Bridgestone calls it “a high-performance sport tire that shows its full fighting ability in production racing.” Mostly small 16- and 17-inch sizes, aimed at minibike racing. Bridgestone recommends it for “customers riding sport sessions or production races at the circuit.” There is no not-for-road marking.
Across the six axes, Dry・Warm-up・Sport sits at 4 and Wet・Life・Comfort at 2. Neither extreme nor flat. Of the 14 tires in the Race group, 3 carry 4 for Dry. 4 front sizes and 3 rear, mostly 17-inch.
Our rating (1–5)
| Dry | 4 / 5 |
|---|---|
| Wet | 2 / 5 |
| Life | 2 / 5 |
| Warm-up | 4 / 5 |
| Comfort | 2 / 5 |
| Sport | 4 / 5 |
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.
Size lineup
Front
- 80/90-16
- 80/90-17
- 90/80-17
- 100/80-17
Rear
- 90/90-17
- 100/80-17
- 120/80-17
Bikes whose OE sizes it fits
Of the 260 bikes on file, this tire’s size lineup fits the OE sizes of 5. Each link opens the tires you can pick for that bike.
| Model | Years | Front | Rear |
|---|---|---|---|
| Kawasaki MEGURO S1 | 2026 model | 90/90-18 | 110/90-17 |
| Kawasaki W230 | 2024–present | 90/90-18 | 110/90-17 |
| Suzuki Gixxer 150 | current as of Aug 2026 | 100/80-17 | 140/60R17 |
| Yamaha MT-125 | 2023 model | 100/80-17 | 140/70-17 |
| Yamaha YZF-R125 / R15 | 2023 model | 100/80-17 | 140/70-17 |
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.