BMC Alpenchallenge vs Sun Biscayne Tandem CB

Compare Specifications of BMC Alpenchallenge and Sun Biscayne Tandem CB

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BMC Alpenchallenge
BMC Alpenchallenge

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Sun Biscayne Tandem CB
Sun Biscayne Tandem CB

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Model:

Brand:

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Technical Specifications
Gear Shift Pattern Gear : 1 x 8 --
Frame Alpenchallenge Alloy, Belt Drive
Hydroformed Aluminium
Internal Cable Routing
Eccentric Bottom Bracket
High Tensile Steel, TIG-Welded
Stem BMC RSM01 Alloy, 25.4 x 180mm Quill x 80mm Ext. x 25.4 Clamp, Black
Handle Bar BMC LSB 03 Steel, 28.4" Wide x 7.3" Rise x 25.4 Clamp, Black
Fork Alpenchallenge Alloy --
Seatpost BMC LSP 03 --
Grip -- Foam, Black
Pedals -- Slip Resistant Top, 9/16", Black
Chain Belt, Gates CDN-CT 115 K.M.C. 1/2" x 1/8", Black (130 Links)
Shifters Shimano Alfine 8, Rapidfire Plus --
Saddle Selle Royal Vivo Comfort Cruiser, Elastomer Suspension, Black
Headset -- Steel, 25.4 x 34 x 30mm, Black
Hub Front Shimano HB-M4050 / Shimano Nexus 8 Shimano CB-E110 Coaster Brake, 36H x 14G, Black
Hub Rear Shimano HB-M4050 / Shimano Nexus 8 Alloy, 36H x 14G x 3/8" Bolt-On Axle, Black
Spoke -- 14G Stainless Steel with Brass Nipples
Cassette Gates CDX-CT SureFit, 24T --
Chainrings Chainwheel : Gates CenterTrack CDN-S-150, 55T --
Sprocket -- 19T x 1/2'' x 1/8''
Stand -- Alloy, Center Mount, Black
Tyres
Front 35 mm, Continental Contact Speed Beach Bum 26 x 2.125", Black Wall
Rear 35 mm, Continental Contact Speed Beach Bum 26 x 2.125", Black Wall
Wheel / RIM PFR300 Rims: 26" x 36H x 14G, Red
Brakes
Front Shimano MT500/RT54 rotors (160/160) Alloy (Linear Pull) Black
Rear Shimano MT500/RT54 rotors (160/160) 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 12.8 kg 27.2 kg
Overview
Features - Low-Maintenance Drivetrain
- Fast Frame Designs
- Great-Handling Fork
- Fender and Kickstand Mounts
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Additional Details Tire Clearance : 37 mm
ASTM Classification : Level 2
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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