sheaves 200 are used to decelerate the carrier 169 the first drive sheave 204 rotates the slowest the second drive sheave 206 rotates faster than the first drive sheave 204 the third drive sheave 208 rotates faster than the second drive sheave 206 a first tire 220 is outfitted to the first drive sheave 204 likewise a second tire 222 is outfitted to the second drive sheave 206 and a third tire 224 is outfitted to the third drive sheave 208 the tires 220 222 224 are the same as the tire 184 described in fig4 only the second tire 222 and the third tire 224 are contacting the friction plate 174 in fig5 during deceleration the speed of the carrier 169 is governed by the speed of the slowest sheave contacting the friction plate 174 the second tire 162 has deformed so as to increase its radius of the second drive sheave 206 proximate the friction plate 174 more specifically the angle n of the second tire 222 as referenced by the tire 184 of fig4 has decreased as a result of the deceleration forces and its diameter has increased the radius of the third drive sheave 208 proximate the friction plate 174 has decreased as a result of the deceleration forces and the increase of the angle n based.