Sun Biscayne Tandem CB vs Trek Domane SL 7 Disc

Compare Specifications of Sun Biscayne Tandem CB and Trek Domane SL 7 Disc

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Sun Biscayne Tandem CB
Sun Biscayne Tandem CB

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Trek Domane SL 7 Disc
Trek Domane SL 7 Disc

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Technical Specifications
Frame High Tensile Steel, TIG-Welded 500 Series OCLV Carbon, Front & Rear IsoSpeed, tapered head tube, flat mount disc brakes, internal cable routing, hidden fender mounts, 3S chain keeper, DuoTrap S compatible, Ride Tuned seatmast
Stem Alloy, 25.4 x 180mm Quill x 80mm Ext. x 25.4 Clamp, Black Bontrager Pro, 31.8 mm, 7 degree, with computer & light mounts
Handle Bar Steel, 28.4" Wide x 7.3" Rise x 25.4 Clamp, Black Bontrager Elite IsoZone VR-CF, 31.8 mm
Fork -- Domane carbon disc, carbon tapered steerer, flat mount disc brakes
Seatpost -- Bontrager Ride Tuned carbon seatmast cap, 20 mm offset
Grip Foam, Black Bontrager tape
Crankset -- Shimano Ultegra
Pedals Slip Resistant Top, 9/16", Black --
Chain K.M.C. 1/2" x 1/8", Black (130 Links) Shimano Ultegra
Shifters -- Shimano Ultegra Di2, 11 speed
Saddle Comfort Cruiser, Elastomer Suspension, Black Bontrager Arvada Comp, steel rails
Headset Steel, 25.4 x 34 x 30mm, Black Integrated, cartridge bearing, sealed, 1-1/8 top, 1.5 bottom
Derailleur Front -- Shimano Ultegra Di2, braze-on
Derailleur Rear -- Shimano Ultegra Di2
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 Ultegra, 11-32, 11 speed
Chainrings -- 50 / 34 T
Sprocket 19T x 1/2'' x 1/8'' --
Stand Alloy, Center Mount, Black --
Tyres
Front Beach Bum 26 x 2.125", Black Wall Bontrager R2 Hard-Case Lite, aramid bead, 700 x 32 c
Rear Beach Bum 26 x 2.125", Black Wall Bontrager R2 Hard-Case Lite, aramid bead, 700 x 32 c
Wheel / RIM Rims: 26" x 36H x 14G, Red Bontrager Aeolus Pro 3 Disc Tubeless Ready
Brakes
Front Alloy (Linear Pull) Black Shimano Ultegra flat mount hydraulic disc
Rear Shimano CB-E110 Internal Coaster Brake, Black Shimano Ultegra flat mount hydraulic disc
Brake Lever Alloy (Linear Pull) Black / Silver --
Suspension
Front -- --
Rear -- --
Colors Available
Colors Metallic Red Matte Dnister Black/Gloss Black


Physical Specs
Length -- --
Weight 27.2 kg --
Overview
Features -- --
Additional Details 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
Axles : 12 mm thru
Bottom Bracket : BB90

Which one do you think is better? And why?
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