Felt AR FRD Ultimate Dura-ACE DI2 vs Sun Biscayne Tandem CB

Compare Specifications of Felt AR FRD Ultimate Dura-ACE DI2 and Sun Biscayne Tandem CB

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Felt AR FRD Ultimate Dura-ACE DI2
Felt AR FRD Ultimate Dura-ACE DI2

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Sun Biscayne Tandem CB
Sun Biscayne Tandem CB

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Technical Specifications
Drivetrain 2x11-speed --
Frame Felt AeroRoad 3.0 UHC Ultimate + TeXtreme carbon fiber High Tensile Steel, TIG-Welded
Stem Felt Sprint UHC Advanced carbon fiber Alloy, 25.4 x 180mm Quill x 80mm Ext. x 25.4 Clamp, Black
Handle Bar PRO Vibe Aero Superlight Steel, 28.4" Wide x 7.3" Rise x 25.4 Clamp, Black
Fork Felt AeroRoad 3.0 UHC Ultimate + TeXtreme carbon fiber --
Seatpost Felt AeroRoad IL 2.0 UHC Advanced + TeXtreme carbon fiber --
Grip Felt VelvetGel tape with 3M reflective base and Felt Bubble-Tech F-Wing bar end plugs Foam, Black
Crankset Shimano Dura-Ace R9100, 52/36T
Crank Length : 48cm: 167.5 mm / 51cm: 170 mm / 54, 56cm: 172.5 mm / 58, 61cm: 175 mm
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Pedals -- Slip Resistant Top, 9/16", Black
Chain Shimano Dura-Ace HG901 K.M.C. 1/2" x 1/8", Black (130 Links)
Shifters Shimano Dura-Ace Di2 R9170 --
Saddle Prologo Dimension 143 Nack Comfort Cruiser, Elastomer Suspension, Black
Headset IS (NO.44) 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 --
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 Dura-Ace R9100, 11-28T --
Sprocket -- 19T x 1/2'' x 1/8''
Bottom Bracket CeramicSpeed EVO386 for Shimano Road --
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 HED Vanquish RC6 Pro Series, 12 mm, Shimano Rims: 26" x 36H x 14G, Red
Brakes
Front Disc, Flat Mount 140 mm minimum rotor Alloy (Linear Pull) Black
Rear Disc, Flat Mount 25 mm thickness, 140 mm minimum rotor Shimano CB-E110 Internal Coaster Brake, Black
Brake Lever -- Alloy (Linear Pull) Black / Silver
Suspension
Front -- --
Rear -- --
Colors Available
Colors -- Metallic Red


Physical Specs
Length -- --
Weight 7.64 kg 27.2 kg
Overview
Features -- --
Additional Details Sizes : 6 | 48, 51, 54, 56, 58, 61cm
Frame Technologies : MMC / InsideOut
Derailleur Hanger Type Front : Brazed-On | integrated backup plate, non-replaceable, aluminum
Derailleur Hanger Type Rear : Standard Mount TA 12x142 road, replaceable, aluminum
Protector Type : Felt SteererStop integration for replaceable brake and shift protection / Felt CDRoad integration for chain drop protection / Felt ChainPlate for chain suck protection / Clear vinyl for chain slap protection
Brake Calipers : Shimano Dura-Ace R9170, hydraulic disc, flat mount
Routing Type : Semi-Hidden electronic specific
Fork Technologies : Monocoque construction / Integrated crown race
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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