Jamis Explorer A1 vs Sun Biscayne Tandem CB

Frame	6061 TIG-welded aluminum, all-new sport comfort design with upright ride position, replaceable derailleur hanger, center-mount kickstand bracket	High Tensile Steel, TIG-Welded
Stem	Jamis alloy, angle-adjustable, 90mm ext x 150mm quill (14–18") or 110mm ext x 180mm quill (19–21”)	Alloy, 25.4 x 180mm Quill x 80mm Ext. x 25.4 Clamp, Black
Handle Bar	Comfort hi-rise, alloy 25.4 x 80mm rise x 15˚ sweep x 620mm	Steel, 28.4" Wide x 7.3" Rise x 25.4 Clamp, Black
Fork	SR Suntour XCE 27.5", coil spring, external preload adjustor, 28mm stanchions, aluminum lowers, 80mm travel	--
Seatpost	Suspension, alloy micro-adjust, 350mm x 27.2mm, with alloy QR clamp	--
Grip	Kraton comfort	Foam, Black
Crankset	Shimano TY301, 48/38/28T, 170mm with chainguard	--
Pedals	Comfort platform with TPE non-slip insert	Slip Resistant Top, 9/16", Black
Chain	KMC Z7	K.M.C. 1/2" x 1/8", Black (130 Links)
Shifters	Shift levers : Shimano EZ-Fire Plus, ST-EF510, 24-speed	--
Saddle	Jamis Comfort with memory foam, synthetic suede top, burnished side panels and bumper springs	Comfort Cruiser, Elastomer Suspension, Black
Headset	Internal cup, threaded, 1 1/8”	Steel, 25.4 x 34 x 30mm, Black
Derailleur Front	Shimano TY710 31.8mm top swing/dual	--
Derailleur Rear	Shimano TX-800	--
Hub Front	--	Shimano CB-E110 Coaster Brake, 36H x 14G, Black
Hub Rear	--	Alloy, 36H x 14G x 3/8" Bolt-On Axle, Black
Spoke	--	14G Stainless Steel with Brass Nipples
Cassette	Shimano HG20, 8-speed, 12-32	--
Sprocket	--	19T x 1/2'' x 1/8''
Bottom Bracket	Sealed cartridge, 68 x 110.5mm	--
Stand	--	Alloy, Center Mount, Black

Front	CST - 1918, 27.5 x 2.1	Beach Bum 26 x 2.125", Black Wall
Rear	CST - 1918, 27.5 x 2.1	Beach Bum 26 x 2.125", Black Wall
Wheel / RIM	Double-wall alloy rims, 32H, alloy hubs with QR, 14g stainless steel spokes	Rims: 26" x 36H x 14G, Red

Front	Tektro forged alloy direct pull brakes with Shimano levers	Alloy (Linear Pull) Black
Rear	Tektro forged alloy direct pull brakes with Shimano levers	Shimano CB-E110 Internal Coaster Brake, Black
Brake Lever	--	Alloy (Linear Pull) Black / Silver

Front	--	--
Rear	--	--

Colors

Riptide Ano Palladium

Metallic Red

Length	--	--
Weight	13 kg	27.2 kg

Features	--	--
Additional Details	Sizes : 15”, 17”, 19", 21”	Captain Crank Left: 3-Piece Alloy, 170mm x 42T x 1/2" x 1/8", Black (For Diamond Square Cranks) Captain Crank Right: 3-Piece Alloy, 170mm, Black (For Diamond Square Cranks) Freewheel: Shimano TZ-21 (7-Speed) 14-28T Captain Crank Right: 3-Piece Alloy, 170mm, Black (For Diamond Square Cranks) Stoker Crank Left: 3-Piece Alloy, 170mm x 42T x 1/2" x 1/8", Black (For Diamond Square Cranks) Stoker Crank Right: 3-Piece Alloy, 170mm x 42T x 1/2" x 3/32", Black (For Diamond Square Cranks) Chainwheel: Steel, Silver Painted W/Plastic Chain Cover Pulley Adjuster:Eccentric BB Insert Seat Clamp: Alloy, 28.6mm I.D., with Double Bolt, Black Stoker Seat Clamp: Alloy, 34.9mm I.D., Black Front Fender: Steel, W/Single Strut, Painted Rear Fender: Steel, W/Single Strut, Painted Fender Set: Plastic, F&R W/Rubber Bump Guards, Silver