Feedback 4-BIKE Expansion Kit The Feedback 4-BIKE Expansion Kit allows for the addition of two extra bikes onto the Velo Cache. The kit includes 2 sets of cradle arms a 1 longer fourth back leg. This sweet accessory comes into good use when the N+1 formula is active and the extra room for bikes starts becoming a Luxury. Feedback 4-BIKE Expansion Kit Features Support arm length 10? (250 mm) Load capacity 160 lbs. / 40 lbs. Per cradle set 3-year warranty | Feedback Sports | 4-Bike Expansion Kit Black