The 20-year-old from Canterbury hit a tree when he was out for a spin and had to wear a cast for a short time.
Boxall said: "It has been taken off now and I'm OK. The injury wasn't too bad and it won't affect my preparations for the new season."
His deal with the Aces included a place on the books of Polish League Tarnow.
As part of the agreement he is going to Poland tomorrow for a week's fitness camp which will include hiking and skiing but no bike work.
He added: "I've been skiing before and I'll be able to have a go despite the injury. This is a great chance to do some fitness work for the new season as well as to get to know the people at Tarnow.
"I will be going back in March for a couple of pre-season meetings when we will be assessed before they pick any teams."
Californian Ryan Fisher, who was axed by the Aces last season, is on his way back to British racing with Edinburgh.
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