| unitube | dimension | D | D40 | A | A40 | S36 | S60 | ETRTO | dimensions | | Race 26 | 18/25 - 559/571 |  |  |  |  | x | x | 25 - 559 | 26 x 1 |  |  |  |  |  |  |  |  | 18, 20, 23, 25 - 571 | 650 x 18C, 20C, 23C, 25C | | Race 26 Light | 18/25 - 559/571 |  |  |  |  | x [65 g] | x [75 g] | 25 - 559 | 26 x 1 |  |  |  |  |  |  |  |  | 18, 20, 23, 25 - 571 | 650 x 18C, 20C, 23C, 25C | | Race 26 Supersonic | 18/25 - 559/571 |  |  |  |  | x [45 g] | x [50 g] | 25 - 559 | 26 x 1 |  |  |  |  |  |  |  |  | 18, 20, 23, 25 - 571 | 650 x 18C, 20C, 23C, 25C | | Race 28 | 18/25 - 622/630 |  |  |  |  | x | x | 18, 20, 23, 25 - 622 | 700 x 18C, 20C, 23C, 25C |  |  |  |  |  |  |  |  | 23, 25 - 630 | 27 x 3/4 - 1 | | Race 28 Light | 15/25 - 622/630 |  |  |  |  | x [70 g] | x [80 g] | 18, 20, 23, 25 - 622 | 700 x 18C, 20C, 23C, 25C |  |  |  |  |  |  |  |  | 23, 25 - 630 | 27 x 3/4 -1 | | Race 28 Supersonic | 18/25 - 622/630 |  |  |  |  | x [50 g] | x [55 g] | 18, 20, 23, 25 - 622 | 700 x 18C, 20C, 23C, 25C |  |  |  |  |  |  |  |  | 23, 25 - 630 | 27 x 3/4 - 1 |
The advantages of the Continental Unitube system - Multi-size tubes allow greater compatibility with more tire sizes, and fewer tubes.
- Unitubes are available in both Schrader and Presta valve tubes. Presta valves are available in a variety of lengths.
- All tubes are seamless and mold-cured (vulcanized) to ensure uniform roundness and improved reliability at the valve stem.
- Each and every tube passes a stringent 100% quality control inspection
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