Gravel Tire Width Guide: A 40–43c tyre is the right choice for riders who prioritise rolling speed on hardpack, frequently mix gravel with tarmac, or compete in gravel events with well-maintained courses. A 47–53c tyre suits riders who tackle chunky loose gravel, loaded adventure routes, or want confidence on rough and unpredictable terrain. Most riders who go wide once do not go back — provided their frame can accommodate the width.