Our patented hand weight holder is compatible only with the Schwinn AC Performance Plus Indoor Cycles Modle. This dumbbell holder fits both the chain drive and Carbon Blue Belt Drive for efficient hand weight storage. The ICDBR unique design requires no additional hardware or welding to mount on the bike frame. This uni-welded heavy-duty steel frame with laser cut top bracket, is powder coat painted in semi-gloss black to match the Schwinn crank arms. The ICDBR comes with a LIFETIME WARRANTY and was exhaustively tested at GRIT Cycle in Costa Mesa, CA, the heaviest use indoor cycling studio in Southern CA.