Dear Tmac0033 Thanks for writing us here, We recommended to purchase a a FOBO Bike 2 set because it is including with lock-nuts and wrench however you can only buy 2 spare sensors but accessories isn't included. Should you have any issue arise, you may revert to us for further assistance by writing an email to "cx@my-fobo.com". Best Regards Amir Bayati Customer Experience | Salutica Allied Solutions Sdn. Bhd. (a subsidiary of Salutica Berhad) 3 Jalan Zarib 6, Kawasan Perindustrian Zarib, 31500 Lahat, Ipoh, Perak, Malaysia M +6016 787 3175 | my-fobo.salutica.com.my