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The Bridgestone M403 Front Motorcycle Tire 70/100-17 40M is a bias-construction front tire made in Japan, drawing on technology Bridgestone developed through factory SX, MX, and off-road racing programs. The rubber compound, tread pattern, and casing are all shaped by that race background, and the tire is built to give the rider consistent cornering control and feedback when leaned over hard.
The size code 70/100-17 tells you three things: 70 is the section width in millimetres, 100 is the aspect ratio meaning the sidewall height is 100 percent of that width, and 17 is the rim diameter in inches, which must match your wheel. Check the sidewall of the tire you are replacing and confirm the size code there matches before ordering. The load index of 40 and speed rating of M, which covers speeds up to 81 mph (130 km/h), should both meet or exceed what your machine's specification calls for.
| Brand | Bridgestone |
| MPN | 03120112 |
| Model | M403 |
| Position | Front |
| Tire Size | 70/100-17 |
| Construction | Bias |
| Load Index | 40 |
| Speed Rating | M |
| Speed Rated To | 81 mph (130 km/h) |
| Overall Diameter | 23.22 in. |
| Section Width | 70 mm |
| Aspect Ratio | 100 |
| Rim Diameter | 17 in. |
| Weight | 4.9 lbs. |
| Country of Origin | Japan |
Not every product runs through our fitment finder, and we would rather you confirm exact fitment than rely on a partial filter. Match the specifications against your machine or the part you are replacing, or contact us and we will confirm it for you.
Ask a Parts Specialist →| Brand | Bridgestone |
|---|---|
| SKU: | 03120112 |
| MPN | 107823 |
| UPC: | 092971273873 |
| Condition: | New |
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