Erpm limits on the Focbox? Eric Wilson October 18, 2017 16:08 Updated Follow Well there's a myth going around that it is 60K ERPM which is fine. We've tested it to 100k ERPM. Related articles How do I configure my Focbox? What is the Focbox? Focbox Physical Dimensions Why are the motor wires different on the FOCBOX to the VESC-X? How to update/flash the firmware on Focbox/Vesc/R1 Comments 0 comments Article is closed for comments.