ブリヂストン BATTLAX BT-39: sizes and matching bikes
Type: Sport ／ Street legal
About this tire
Bridgestone calls it “the sport bias standard, with both sport and comfort.” The usual sport bias for the 250 class, balanced further toward touring than the TT900GP. Tubeless in every size.
Across the six axes, Dry・Warm-up・Sport sits at 4 and Wet・Life・Comfort at 3. The six numbers land close together: an even set-up. Of the 19 tires in the Sport group, 15 carry 4 for Dry. 4 front sizes and 6 rear, mostly 17-inch.
Our rating (1–5)
| Dry | 4 / 5 |
|---|---|
| Wet | 3 / 5 |
| Life | 3 / 5 |
| Warm-up | 4 / 5 |
| Comfort | 3 / 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
- 90/80-17
- 100/80-17
- 110/70-17
- 110/80-17
Rear
- 130/90-16
- 120/70-17
- 120/80-17
- 130/70-17
- 140/70-17
- 140/70-18
Bikes whose OE sizes it fits
Of the 260 bikes on file, this tire’s size lineup fits the OE sizes of 32. Each link opens the tires you can pick for that bike.
| Model | Years | Front | Rear |
|---|---|---|---|
| BMW G 310 R | 2016–present | 110/70R17 | 150/60R17 |
| KTM 125 DUKE | 2025–26 models | 110/70ZR17 | 150/60ZR17 |
| KTM 125 SMC R / 390 SMC R | 2025–26 models | 110/70R17 | 150/60R17 |
| KTM 250 DUKE | 2026 model | 110/70R17 | 150/60R17 |
| KTM 390 DUKE | 2025 model | 110/70ZR17 | 150/60ZR17 |
| Kawasaki KLX230SM | 2026 model | 110/70-17 | 120/70-17 |
| Kawasaki MEGURO S1 | 2026 model | 90/90-18 | 110/90-17 |
| Kawasaki Ninja 250 | 2027 model, on sale 5 Sep 2026 | 110/70-17 | 140/70-17 |
| Kawasaki Ninja 400 | 2027 model | 110/70R17 | 150/60R17 |
| Kawasaki Ninja 500 | 2026 model | 110/70R17 | 150/60R17 |
| Kawasaki Ninja ZX-25R SE / ZX-25RR | 2027 model | 110/70R17 | 150/60R17 |
| Kawasaki W230 | 2024–present | 90/90-18 | 110/90-17 |
| Kawasaki Z250 | 2019–present | 110/70-17 | 140/70-17 |
| Kawasaki Z400 | 2019–present | 110/70R17 | 150/60R17 |
| Kawasaki Z500 | 2026 model | 110/70R17 | 150/60R17 |
| Suzuki DR-Z4SM | 2025–present | 120/70R17 | 140/70R17 |
| Suzuki GSX250R | current as of Aug 2026 | 110/80-17 | 140/70-17 |
| Suzuki V-Strom 250 | current as of Aug 2026 | 110/80-17 | 140/70-17 |
| Suzuki Gixxer 150 | current as of Aug 2026 | 100/80-17 | 140/60R17 |
| Suzuki Gixxer 250 | 2020–present | 110/70R17 | 150/60R17 |
| Suzuki Gixxer SF250 | current as of Aug 2026 | 110/70R17 | 150/60R17 |
| Triumph Speed 400 | current as of Aug 2026 | 110/70R17 | 150/60R17 |
| Honda CB125R | 2024 model | 110/70R17 | 150/60R17 |
| Honda CB250R | to Aug 2024, discontinued | 110/70R17 | 150/60R17 |
| Honda CBR250RR | 2025 model | 110/70R17 | 140/70R17 |
| Yamaha MT-03 | 2015–present | 110/70R17 | 140/70R17 |
| Yamaha MT-25 | 2015–present | 110/70-17 | 140/70-17 |
| Yamaha MT-125 | 2023 model | 100/80-17 | 140/70-17 |
| Yamaha XSR125 / XSR155 | 2026 model | 110/70-17 | 140/70-17 |
| Yamaha YZF-R3 | 2026 model | 110/70R17 | 140/70R17 |
| Yamaha YZF-R25 | 2026 model | 110/70-17 | 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.