Both types of adjustment knobs for the Life Fitness GX spin bikes.
Ref. Life Fitness GX Studio Bike with Console (Commercial Gym Equipment)
Life Fitness GX Rower
Life Fitness GX Rower Seat Rollers Black x6
Life Fitness GX Rower Middle Handle Cover x2 0K106-75017-0000
Life Fitness ICG Spin Bike Pedals 9/16" Updated Style Left Right Two Pairs
Life Fitness IC7 Spin Bike Primary Drive Idler Pulley Assembly 150-01-00069-02
