The 6ft 9ins big man – left on the picture above – from West Sussex joins the club following a stint in the US college system.
It takes coach Yorick Williams’ roster to seven following the re-signing this week of club stalwart Callum Jones.
Ingus Bankevics, Jerelle Okoro, Barry Webster, Reiss Haggith and Rom Geffen are already on board for the 2016/17 BBL season.
Bell, 25, played two seasons for the University of Nevada before transfering to Clayton State.
The Giants are his first professional team and club CEO John Dwan said: “We are really pleased to have Richard with us.
“”He impressed us with his ability and attitude and he has signed a two-year contract.””
Bell said: “”I’m really looking forward to the challenge. I’m very pleased to have signed for the Giants.
“”I’ll bring them some size – I’m a big body