Jamis Helix A2 vs Sun Biscayne Tandem 7

Compare Specifications of Jamis Helix A2 and Sun Biscayne Tandem 7

Selected Bikes

Jamis Helix A2
Jamis Helix A2

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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 6061 aluminum main tubes, over-sized seat tube, zero-stack head tube, over-sized stays, replaceable derailleur hanger High Tensile Steel, TIG-Welded
Stem Jamis XC alloy threadless, 31.8 x 10˚ rise x 75mm (14”/16”), 90mm (18”) 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 Jamis XC alloy riser, 31.8 x 20mm rise x 720mm 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 SR Suntour XCE 28 DS 27.5”, coil spring, external preload adjustor, 28mm stanchions, aluminum lowers, 100mm travel 1-1/8" High Tensile Steel, Curved Legs, Double Eyelets
Seatpost Jamis alloy micro-adjust, 31.6 x 350mm (14”) 400mm (16”/18”) Alloy w/o Clamp, 25.6 x 350mm, Black
Grip Kraton Foam, Black
Crankset Forged Alloy, 36/22T --
Pedals MTB platform, hi-impact resin Slip Resistant Top, 9/16", Black
Chain KMC Z8.3, 8-speed K.M.C. 1/2" x 3/32", Black (130 Links)
Shifters Shift levers : Shimano EF505, 2x8-speed Shimano 7-Speed Revo Twist Shifter
Saddle Jamis ATB Sport Women’s Comfort Cruiser, Elastomer Suspension, Black
Headset Zero-stack internal cup, 8mm cone spacer Steel, 25.4 x 34 x 30mm, Black
Derailleur Rear Shimano Tourney rear and Altus front 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 nickel-plated spokes 14G Stainless Steel with Brass Nipples
Cassette Shimano HG31, 8-speed, 11-32T --
Bottom Bracket Sealed cartridge BC1.37'' x 24TPI, Steel, Caged Bearings
Spindle:Bolt Type, 119mm
Stand -- Alloy, Center Mount, Black
Tyres
Front CST Patrol, 27.5 x 2.25” Beach Bum 26 x 2.125", Black Wall
Rear CST Patrol, 27.5 x 2.25” Beach Bum 26 x 2.125", Black Wall
Wheel / RIM Alex TD26 27.5” rims, 32H, alloy disc hubs 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 Shimano MT200 hydraulic disc, Shimano RT26 160mm rotors Alloy (Linear Pull) Black
Rear Shimano MT200 hydraulic disc, Shimano RT26 160mm rotors Alloy (Linear Pull) Black
Brake Lever -- Alloy (Linear Pull) Black / Silver
Suspension
Front -- --
Rear -- --
Colors Available
Colors Vanilla Mint
Charcoal
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Physical Specs
Length -- --
Weight -- 27.2 kg
Overview
Features -- --
Additional Details Sizes : 14”, 16”, 18” 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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