ブリヂストン BATTLAX BT-45V / BT-45: sizes and matching bikes
Type: Standard ／ Street legal
About this tire
Bridgestone calls it “a touring bias with a long sales record, built on all-round performance matched to what riders actually need.” Silica in the compound for wet performance, and a sport-sact rear. ★ The Japanese lineup has shrunk to two front and three rear sizes; almost none of the small diameters that made it a staple are left ★
Across the six axes, Wet・Life・Comfort sits at 4 and Dry・Warm-up・Sport at 3. The six numbers land close together: an even set-up. Of the 35 tires in the Standard group, 12 carry 4 for Wet. 2 front sizes and 3 rear, mostly 18-inch.
Our rating (1–5)
| Dry | 3 / 5 |
|---|---|
| Wet | 4 / 5 |
| Life | 4 / 5 |
| Warm-up | 3 / 5 |
| Comfort | 4 / 5 |
| Sport | 3 / 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
- 3.50-18
- 90/100-18
Rear
- 4.00-18
- 110/90-18
- 150/70-18
Bikes whose OE sizes it fits
Of the 260 bikes on file, this tire’s size lineup fits the OE sizes of 6. Each link opens the tires you can pick for that bike.
| Model | Years | Front | Rear |
|---|---|---|---|
| Kawasaki MEGURO K3 | 2026 model | 100/90-19 | 130/80-18 |
| Kawasaki W800 | 2026 model | 100/90-19 | 130/80-18 |
| Ducati Scrambler Icon / Dark / Nightshift / Full Throttle | 2023–present | 110/80R18 | 180/55R17 |
| Triumph Bonneville T100 | current as of Aug 2026, UK spec | 100/90-18 | 150/70R17 |
| Triumph Bonneville T120 | current as of Aug 2026 | 100/90-18 | 150/70R17 |
| Triumph Speed Twin 900 | current as of Aug 2026 | 100/90-18 | 150/70R17 |
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.