What This Tire & Tube Fitment Chart Helps With
This chart helps you quickly identify tire size conversions and recommended inner tube fitment for electric dirt bikes and pit bikes. It’s designed to remove confusion when choosing tires and tubes, especially when metric sizes don’t line up perfectly across brands.
Important Note About Tube Fitment
Inner tubes do not need to match the tire size exactly. Tubes are designed to deflate and inflate to fit a range of tire sizes, which is why it’s common for multiple tires to use the same tube size.
Not every manufacturer makes a tube for every exact tire size, so selecting a tube that is close in size is standard practice in motorcycle and e-moto shops. As long as the tube falls within the recommended range shown below, it will install and function properly when mounted correctly.
| Tire Size |
Inch Tire Size (Approx.) |
Tube Fitment (Metric) |
| 80/100x12 |
3.00x12 |
70/100x12 or 80/100x12 |
| 60/100x14 |
2.50x14 |
60/100x14 |
| 80/100x16 |
3.00x16 |
80/100x16 or 90/100x16 |
| 90/100x16 |
3.75–4.10x16 |
90/100x16 |
| 70/100x17 |
2.75x17 |
70/100x17 |
| 70/90x17 |
2.50–2.75x17 |
70/100x17 |
| 80/90x17 |
2.75–3.00x17 |
70/100x17 |
| 90/80x17 |
3.00–3.25x17 |
70/100x17 or 80/100x17 |
| 110/100x17 |
4.25–4.50x17 |
110/100x17 |
| 80/100x18 |
3.00x18 |
80/100x18 or 90/100x18 or 100/100x18 |
| 90/90x18 |
3.25–3.50x18 |
90/100x18 or 100/100x18 |
| 90/100x18 |
3.50–3.75x18 |
90/100x18 or 100/100x18 |
| 100/100x18 |
3.90–4.10x18 |
90/100x18 or 100/100x18 |
| 110/100x18 |
4.50x18 |
100/100x18 or 110/100x18 |
| 90/100x19 |
3.50x19 |
80/100x19 or 100/90x19 |
| 70/100x19 |
2.75–3.00x19 |
70/100x19 |
| 80/90x19 |
3.00–3.25x19 |
70/100x19 or 80/100x19 |
| 80/100x19 |
3.00–3.25x19 |
70/100x19 or 80/100x19 |
| 70/100x21 |
2.75x21 |
70/100x21 or 80/100x21 |
| 80/100x21 |
3.00x21 |
80/100x21 |
