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What does ETRTO mean in tires?
European Tire and Rim Technical Organization
Nowadays, bicycle tire sizes are all marked according to ETRTO (European Tire and Rim Technical Organization) standard. However, older English and French tire size dimensions are still used as well. The ETRTO size specification 37-622 indicates the width of 37 mm and the tire inner diameter of 622 mm.
What does 47 52 mean on a bike tire?
Dec 6, 2012 at 9:32. Presumably the “47/52” means 47-52mm tire width, depending on who’s measuring. This would be 1.85-2.05 inches. This does kind of put you on the edge, but tubes are quite tolerant of size differences, and the 1.90-2.125 tube should be fine.
What ETRTO 559?
ETRTO is the European tire and rim technical organization, and is another measurement of circumference. 559 is the BSD of the tire and rim, Bead Seat Diameter. standard 26″ tires are 559mm, road tires are 622mm, etc. the first number is the width of the tire. a 23×622 is a standard road tire.
How is ETRTO measured?
At Swytch, we measure our wheel sizes by ETRTO number, a 5-digit number of the form ## – ### which tells you the precise diameter. The first two digits of the ETRTO denote the tyre width in mm. Swytch wheels can take any width tyres from 1.1-2.5 inches (28-64mm). The last three are the inner tyre diameter.
What does Etrto 622×19 mean?
The 622×19 spec is what you need to pay attention to. 622 is the diameter of the rim bead seat in mm. 19 is the inner width of the rim in mm. Look at your tires, if they are marked ‘ISO 622’ or ‘ETRTO 622’ or ‘700C’ (an French system label that is the same as ETRTO/ISO 622), then they are 622mm diameter.
What size TYRE is 47 559?
Table of bicycle tires sizes
| ETRTO | English Size | Rim circumference (mm) |
|---|---|---|
| 47-559 | 26 x 2 x 1-3/4 | 1755 |
| 32-541 | 24 x 1-3/8 x 1-1/4 | 1699 |
| 40-540 | 24 x 1-3/8 x 1½ | 1695 |
| 37-540 | 24 x 1-3/8 | 1695 |
What does 700x45c mean?
The second measurement type (700x45c) is a 45 mm wide tire that also fits on a rim with a 622 mm bead seat diameter, the 700c is an old French sizing nomenclature based on the final external diameter being 700 mm for width class of tire (e.g., a, b, c widths).