Schwalbe Marathon Tire 28 X 1'' 1/2 - 700 X 38-B (ETRTO ~40‑635)

Schwalbe Marathon Tire 28 X 1'' 1/2 - 700 X 38-B (ETRTO ~40‑635) 

This size is for older 28‑inch vintage Bikes / 40‑635 / 28 × 1 ½ / 700×38B: 

Countries and regions where 40‑635 is common

1. The Netherlands – Classic Dutch city bikes (“Omafiets”) and utility bikes often use 635 mm wheels.

2. United Kingdom – Older British roadsters, touring bikes, and school bikes from the mid‑20th century.

3. India & Pakistan – Traditional roadster bikes, such as the Hercules or Atlas steel frames, often used 635 mm wheels.

4. China – Older Chinese roadsters and utility bikes (sometimes exported worldwide).

5. Germany – Some vintage city and touring bikes before the 700C/622 standard became dominant.

6. Other parts of Europe – Early 20th-century bicycles in France, Italy, and Belgium occasionally used 635 mm rims for roadsters or town bikes.

This size is now primarily used for the restoration or maintenance of classic bicycles.