He attached the wheel pairs to the boot using springy carriages known as trucks.

The quad style of skate became the 7️⃣ most popular skate for the next 80 years.

They developed in-line skates with four wheels that extended the full length of 7️⃣ the boot, giving the skater greater maneuverability (compared with previous in-line skates) and much more speed.

The first recorded game of 7️⃣ roller hockey took place in London in 1878.

These sports, sometimes called aggressive roller-skating, include street style, which involves riding through 7️⃣ urban environments and performing tricks off stairs, rails, and other structures, and vertical style, which involves aerial acrobatics performed off 7️⃣ ramps or in a half-pipe (a U-shaped skating structure).