Bradford trialist Nahki Wells has been awarded a one-year contract with the npower League Two club.
The 21-year-old Bermudan forward put pen to paper on the deal, which includes the option for a further year, at the Coral Windows Stadium on Friday morning.
He had previously been training with City since the start of pre-season and scored twice in the Bantams' opening friendly of the summer at Silsden last week.
Boss Peter Jackson said: "I've been impressed with Nahki since he's come here. I think anyone who has seen him play in pre-season will say that he has made an impact in the games that he has come into.
"He will add pace to our squad, and he has League experience from his time with Carlisle.
"I felt last season we lacked pace, but the introduction of players like Nahki will obviously help to change that."
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