Felt IA FRD Ultimate Dura-Ace Di2 vs Sun Biscayne Tandem 7

Compare Specifications of Felt IA FRD Ultimate Dura-Ace Di2 and Sun Biscayne Tandem 7

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Felt IA FRD Ultimate Dura-Ace Di2
Felt IA FRD Ultimate Dura-Ace Di2

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Sun Biscayne Tandem 7
Sun Biscayne Tandem 7

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Technical Specifications
Drivetrain 2x11-speed K.M.C. 1/2" x 1/8", Black (152 Links)
Frame Felt IntegratedAero Disc 1.0 UHC Ultimate + TeXtreme carbon fiber High Tensile Steel, TIG-Welded
Stem Felt Dagger Direct SuperLite aluminum 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 Basebar: Devox Dagger Direct UHC Ultimate + Nano / Extensions: Devox ƒ-Bend | carbon fiber, 3-position 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 Felt IntegratedAero Disc 1.0 - Dagger UHC Ultimate + TeXtreme carbon fiber 1-1/8" High Tensile Steel, Curved Legs, Double Eyelets
Seatpost Felt Aero TRI IL 1.0 VM | UHC Advanced + TeXtreme carbon fiber Alloy w/o Clamp, 25.6 x 350mm, Black
Grip Felt Dimpled gel pads, Felt VelvetGel tape, and Felt bar end plugs Foam, Black
Crankset Shimano Dura-Ace R9100, 52/36T --
Pedals -- Slip Resistant Top, 9/16", Black
Chain Shimano Dura-Ace HG901 K.M.C. 1/2" x 3/32", Black (130 Links)
Shifters Basebar: Shimano Dura-Ace Di2 R9180, TRI/TT / Extensions: Shimano Dura-Ace Di2 SW-R9160, TRI/TT Shimano 7-Speed Revo Twist Shifter
Saddle ISM PS1.0 Ti Comfort Cruiser, Elastomer Suspension, Black
Headset IS (IS-2) Steel, 25.4 x 34 x 30mm, Black
Derailleur Front Shimano Dura-Ace R9150 Di2, braze-on --
Derailleur Rear Shimano Dura-Ace R9150 Di2, short cage 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 Dura-Ace R9100, 11-28T --
Bottom Bracket CeramicSpeed BSA for Shimano Road BC1.37'' x 24TPI, Steel, Caged Bearings
Spindle:Bolt Type, 119mm
Stand -- Alloy, Center Mount, Black
Tyres
Front Continental Grand Prix 5000 TL, 700 x 25c Beach Bum 26 x 2.125", Black Wall
Rear Continental Grand Prix 5000 TL, 700 x 25c Beach Bum 26 x 2.125", Black Wall
Wheel / RIM ZIPP 454/858 NSW Carbon Tubeless Disc-brake, SRAM/Shimano 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, Flat Mount 140 mm minimum rotor Alloy (Linear Pull) Black
Rear Disc, Flat Mount 25 mm thickness, 140 mm minimum rotor Alloy (Linear Pull) Black
Brake Lever Shimano Dura-Ace R9180, TRI/TT, hydraulic Alloy (Linear Pull) Black / Silver
Suspension
Front -- --
Rear -- --
Colors Available
Colors -- --


Physical Specs
Length -- --
Weight 9.02 kg 27.2 kg
Handlebar Width 420 --
Overview
Features -- --
Additional Details Sizes : 5 | 48, 51, 54, 56, 58cm
Derailleur Hanger Type Front : Brazed-On integrated backup plate, non-replaceable, aluminum
Derailleur Hanger Type Rear : Standard Mount | TA 12x142 TRI/TT, horizontal, replaceable, aluminum
Protector Type : Steerer stop integration for head tube protection / Felt ChainPlate for chain suck protection / Clear vinyl for chain slap protection
Head-Tube Type : Felt Aero 1.125"
Routing Type : Semi-Hidden convertible for electronic or mechanical
Brake Calipers : Shimano Dura-Ace R9170, hydraulic disc, flat mount
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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