Jamis Ventura A2 vs Sun Biscayne Tandem CB

Frame	Size Specific Design 6061 aluminum compact sloping top tube frame design with redesigned rear triangle, SST tubing diameters and internal cable guides, 1.5 - 1 1/8” tapered head tube, 31.8 seat tube for 27.2 seat post, replaceable derailleur hanger and fender/rack eyelets	High Tensile Steel, TIG-Welded
Stem	Jamis Road, 3D forged 6061 alloy, 7˚ x 90mm (48/51), 100mm (54/56), 120mm (58/61)	Alloy, 25.4 x 180mm Quill x 80mm Ext. x 25.4 Clamp, Black
Handle Bar	Jamis Ergo, 6061 aluminum, 31.8 x 380mm (48) 400mm (51/54), 420mm (56/58/61)	Steel, 28.4" Wide x 7.3" Rise x 25.4 Clamp, Black
Fork	Jamis Performance ECO carbon composite with carbon steerer, 1.5” hollow formed crown, monocoque one-piece forming technology, carbon dropouts with stainless tabs and exposed fender eyelets	--
Seatpost	Jamis alloy micro-adjust, 27.2 x 350mm with alloy clamp	--
Grip	--	Foam, Black
Crankset	FSA Tempo, 50/34, 170mm (48/51), 172.5 (54/56) 175mm (58/61)	--
Pedals	Touring platform style, full alloy with toe clips	Slip Resistant Top, 9/16", Black
Chain	KMC Z8	K.M.C. 1/2" x 1/8", Black (130 Links)
Shifters	Shiftlevers : Shimano Claris ST-R2000 Dual Control STI, 16-speed	--
Saddle	Jamis Road Sport with SL top	Comfort Cruiser, Elastomer Suspension, Black
Headset	FSA Integrated, threadless, 1.5 - 1 1/8”	Steel, 25.4 x 34 x 30mm, Black
Derailleur Front	Shimano Claris FD-R2000 with 31.8mm alloy clamp	--
Derailleur Rear	Shimano Claris RD-R2000	--
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 HG41 8-speed, 11-32T	--
Sprocket	--	19T x 1/2'' x 1/8''
Bottom Bracket	FSA sealed cartridge, 68 x 110.5mm	--
Stand	--	Alloy, Center Mount, Black

Front	Vittoria Zaffiro, 700 x 28c	Beach Bum 26 x 2.125", Black Wall
Rear	Vittoria Zaffiro, 700 x 28c	Beach Bum 26 x 2.125", Black Wall
Wheel / RIM	Alex ID-19 double wall alloy rims with GSW sidewall, 28/32H, Joytec alloy hubs with QR and 14g stainless steel spokes	Rims: 26" x 36H x 14G, Red

Front	Tektro R315 alloy dual pivot calipers with adjustable pads	Alloy (Linear Pull) Black
Rear	Tektro R315 alloy dual pivot calipers with adjustable pads	Shimano CB-E110 Internal Coaster Brake, Black
Brake Lever	Shimano Claris ST-R2000 STI levers	Alloy (Linear Pull) Black / Silver

Front	--	--
Rear	--	--

Colors

Garnet Storm Grey

Metallic Red

Length	--	--
Weight	10.4 kg	27.2 kg

Features	--	--
Additional Details	Tape : Jamis suede tape with gel Sizes : 48, 51, 54, 56, 58, 61cm	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