Photo 1 of 4 Pack Rocker Feet Adapters with Tennis Balls Only for Wahoo Kickr Core 1, Thick Injection-Molded Accessory for Indoor Bike Cycling Trainers to Make Your Riding More Comfortable (Adapters - 8 Balls)

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Photo 1 of 4 Pack Rocker Feet Adapters with Tennis Balls Only for Wahoo Kickr Core 1, Thick Injection-Molded Accessory for Indoor Bike Cycling Trainers to Make Your Riding More Comfortable (Adapters - 8 Balls)Photo 2 of 4 Pack Rocker Feet Adapters with Tennis Balls Only for Wahoo Kickr Core 1, Thick Injection-Molded Accessory for Indoor Bike Cycling Trainers to Make Your Riding More Comfortable (Adapters - 8 Balls)