Trucks come as a pair.

Sizeinformation:

109-6.9″ axle – for decks 6.25″ – 7.6″

129- 7.6″ axle – for decks 7.4″ – 7.8″

139- 8″ axle – for decks 7.8″ – 8.2″

144- 8.25″ axle – for decks 8.2″ – 8.375″

149 – 8.5″ axle – for decks 8.375″ – 8.6″

159- 8.75″ axle – for decks 8.6″ -9″

169 – 9.125″ axle – for decks9″- 9.5″

215 – 10″ axle – for decks 9.5″ – 10.5″