Bike Inner Tube Sizes Chart
Quick answer: match the tube diameter to the tire diameter first, then choose a width range that includes your tire width. A tire marked 700 x 28 needs a 700c tube with a width range that includes 28 mm, such as 700 x 25-32. A 26 x 1.95 tire needs a 26-inch tube with a range that includes 1.95 inches.
Road, Gravel, and Hybrid Tube Size Chart
| Tire marking | Tube size range to look for | Common bike type | Valve note |
|---|---|---|---|
| 700 x 20-25 mm | 700 x 20-25 | Traditional road | Presta common |
| 700 x 25-32 mm | 700 x 25-32 | Road/endurance | Presta common |
| 700 x 28-37 mm | 700 x 28-37 | Hybrid, cyclocross, gravel | Presta or Schrader |
| 700 x 32-47 mm | 700 x 32-47 | Hybrid/gravel | Check rim drilling |
| 650b x 38-47 mm | 650b / 27.5 x matching width | Gravel/commuter | Presta common |
Mountain Bike Tube Size Chart
| Wheel diameter | Common tube range | Fits tire widths around | Typical use |
|---|---|---|---|
| 20 in | 20 x 1.75-2.125 | 1.75-2.125 in | Kids/BMX |
| 24 in | 24 x 1.75-2.125 | 1.75-2.125 in | Youth bikes |
| 26 in | 26 x 1.75-2.4 | 1.75-2.4 in | Older MTB/cruiser |
| 27.5 in / 650b | 27.5 x 1.9-2.4 | 1.9-2.4 in | Modern MTB/gravel |
| 29 in | 29 x 1.9-2.4 | 1.9-2.4 in | Modern MTB |
| Fat bike | 26 x 3.8-4.8 | 3.8-4.8 in | Fat tire bikes |
How To Pick The Right Bike Tube
- Read the tire sidewall; it usually lists diameter and width.
- Choose a tube whose width range includes your tire width.
- Match the valve type: Presta, Schrader, or Dunlop where applicable.
- Choose a valve stem long enough for deep rims.
- Do not install a much-too-narrow tube in a wide tire unless it is an emergency spare.
Source Notes
Tube ranges were checked against bicycle tube guides including Slime’s bicycle tube sizing guide, BikeRadar’s inner tube guide, and tire-size retailer references. Always confirm your tire sidewall before buying.
