Kestrel RT-1100 Shimano Dura ACE vs Sun Biscayne Tandem 7

Compare Specifications of Kestrel RT-1100 Shimano Dura ACE and Sun Biscayne Tandem 7

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Kestrel RT-1100 Shimano Dura ACE
Kestrel RT-1100 Shimano Dura ACE

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Sun Biscayne Tandem 7
Sun Biscayne Tandem 7

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Technical Specifications
Drivetrain -- K.M.C. 1/2" x 1/8", Black (152 Links)
Frame Kestrel Super Light (KSL) 800K carbon fiber, FM Disc, PF30 BB High Tensile Steel, TIG-Welded
Stem ZIPP Service Course SL, 7075 3D-forged alloy, 31.8 mm, +/- 6 Alloy, 25.4 x 180mm Quill x 80mm Ext. x 25.4 Clamp, Black
Stoker Stem:Alloy, Adjustable Reach (4-Bolt Face) Black
Handle Bar ZIPP Service Course SL 70 Ergo, 31.8 mm Steel, 28.4" Wide x 7.3" Rise x 25.4 Clamp, Black
Stoker Handlebar: Steel, 27" Wide x 10.8" Rise x 25.4mm Clamp, Black
Fork KSL full-carbon, 1 1/8" - 1 1/2" tapered steerer, FM Disc 12 mm TA 1-1/8" High Tensile Steel, Curved Legs, Double Eyelets
Seatpost -- Alloy w/o Clamp, 25.6 x 350mm, Black
Grip -- Foam, Black
Crankset Shimano Dura-Ace, 50/34T --
Pedals -- Slip Resistant Top, 9/16", Black
Chain Shimano Dura-Ace, 11-speed K.M.C. 1/2" x 3/32", Black (130 Links)
Shifters Shimano Dura-Ace STI, 11-speed Shimano 7-Speed Revo Twist Shifter
Saddle Prologo Nago Evo, T2.0 rails Comfort Cruiser, Elastomer Suspension, Black
Headset ACROS The Clamp integrated 1 1/8" top, 1 1/2" bottom Steel, 25.4 x 34 x 30mm, Black
Derailleur Front Shimano Dura-Ace, braze-on --
Derailleur Rear Shimano Dura-Ace, 11-speed Shimano RD-TX35 Tourney
Hub Front -- Alloy, 36H x 14G with 3/8" Bolt-On Axle, Black (For Freewheel)
Hub Rear -- Alloy, 36H x 14G x 3/8" Bolt-On Axle, Black
Spoke -- 14G Stainless Steel with Brass Nipples
Cassette Shimano Ultegra, 11-28T, 11-speed --
Bottom Bracket Praxis PF30 Conversion 24 mm spindle BC1.37'' x 24TPI, Steel, Caged Bearings
Spindle:Bolt Type, 119mm
Stand -- Alloy, Center Mount, Black
Tyres
Front Vittoria Rubino Pro , 700 x 28c, folding Beach Bum 26 x 2.125", Black Wall
Rear Vittoria Rubino Pro , 700 x 28c, folding Beach Bum 26 x 2.125", Black Wall
Wheel / RIM Oval Concepts 723, 700c 24/28H tubeless compatible rims Rims:26" x 36H x 14G, Red
Front: 26" x 1.75 x 36H x 14G Alloy-Cruiser, Bolt-On
Rear: 26" x 1.75 x 36H x 14G Alloy-Cruiser, (FOR FREEWHEEL)
Brakes
Front Disc Alloy (Linear Pull) Black
Rear Disc Alloy (Linear Pull) Black
Brake Lever Shimano R9120 STI Alloy (Linear Pull) Black / Silver
Suspension
Front -- --
Rear -- --
Colors Available
Colors Carbon/Gold --


Physical Specs
Length -- --
Weight 7.91 kg 27.2 kg
Overview
Features -- --
Additional Details Sizes : 45cm , 48cm, 51cm, 54cm, 57cm 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

Which one do you think is better? And why?
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