One powermeter with multiple pedal platform options. No need for a second powermeter This conversion kit offers the option to switch your Rally powermeter between road and off-road pedal platforms Carry out the home service routine and transfer pedal bodies so you can take your power on and off road with you on different bikes These conversion kits are also compatible with Vector 3 so that you can run Rally SPD-SL or Rally SPD pedal bodies as an upgrade