Redcar Bears have signed Lubos Tomicek to their squad as cover for the injured Adam Roynon.
The arrival of Tomicek, 25, will bring the Bears squad back up to full strength after previously opting for the rider replacement system.
"Asking reserves to take six or seven rides in a match has not proved effective," said boss Brian Havelock.
"We have brought an experienced rider into our top five on a temporary basis until Adam is fit and available again."
Roynon is currently out with a broken leg suffered in Redcar's 50-40 defeat by Ipswich in April.