Sun Biscayne Tandem CB vs Trek 520 Grando

Load Carrying Capacity	--	Combined weight of bicycle, rider, and cargo of 275 pounds (125 kg)
Frame	High Tensile Steel, TIG-Welded	Trek butted chromoly disc touring, rack & fender mounts, 135 x 5 mm QR
Stem	Alloy, 25.4 x 180mm Quill x 80mm Ext. x 25.4 Clamp, Black	Size : 48 - Bontrager Elite, 31.8 mm, Blendr compatible, 7 degree, 80 mm length Size : 51 - Bontrager Elite, 31.8 mm, Blendr compatible, 7 degree, 90 mm length Size : 54, 57 - Bontrager Elite, 31.8 mm clamp, Blendr compatible, 7 degree, 100 mm length Size : 60, 63 - Bontrager Elite, 31.8 mm clamp, Blendr compatible, 7 degree, 110 mm length
Handle Bar	Steel, 28.4" Wide x 7.3" Rise x 25.4 Clamp, Black	Size : 48 - Bontrager Comp VR-C, alloy, 31.8 mm, 100 mm reach, 124 mm drop, 40cm width Size : 51, 54 - Bontrager Comp VR-C, alloy, 31.8 mm, 100 mm reach, 124 mm drop, 42cm width Size : 57, 60, 63 - Bontrager Comp VR-C, alloy, 31.8 mm, 100 mm reach, 124 mm drop, 44cm width
Fork	--	520 alloy disc touring, rack mounts, 100 x 5 mm ThruSkew
Seatpost	--	Size : 48 - Bontrager alloy, 27.2 mm, 12 mm offset, 250 mm length Size : 51, 54, 57, 60, 63 - Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length
Grip	Foam, Black	--
Crankset	--	Size : 48, 51 - ProWheel forged alloy, 42/28, 2-piece, 170 mm length Size : 54, 57, 60, 63 - ProWheel forged alloy, 42/28, 2-piece, 175 mm length
Pedals	Slip Resistant Top, 9/16", Black	Wellgo nylon body, alloy cage
Chain	K.M.C. 1/2" x 1/8", Black (130 Links)	KMC X10, 10 speed
Shifters	--	Shimano Tiagra R4700, 10 speed
Saddle	Comfort Cruiser, Elastomer Suspension, Black	Bontrager Arvada, steel rails, 138 mm width
Headset	Steel, 25.4 x 34 x 30mm, Black	1-1/8'' threadless, sealed cartridge bearings
Derailleur Front	--	Shimano Tiagra 4700, 34.9 mm clamp, down swing
Derailleur Rear	--	Shimano GRX RX400, long cage, 36T max cog
Hub Front	Shimano CB-E110 Coaster Brake, 36H x 14G, Black	Shimano M475, 6-bolt disc, 135 x 5 mm QR
Hub Rear	Alloy, 36H x 14G x 3/8" Bolt-On Axle, Black	Shimano M475, 6-bolt disc, 100 x 5 mm QR
Spoke	14G Stainless Steel with Brass Nipples	14g stainless steel
Cassette	--	Shimano HG50, 11-36, 10 speed
Sprocket	19T x 1/2'' x 1/8''	--
Stand	Alloy, Center Mount, Black	--

Front	Beach Bum 26 x 2.125", Black Wall	Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700 x 40c
Rear	Beach Bum 26 x 2.125", Black Wall	Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700 x 40c
Wheel / RIM	Rims: 26" x 36H x 14G, Red	Bontrager Affinity Disc, Tubeless Ready, 36-hole, 21 mm width, presta valve

Front	Alloy (Linear Pull) Black	TRP Spyre C 2.0 mechanical disc, 160 mm rotor
Rear	Shimano CB-E110 Internal Coaster Brake, Black	TRP Spyre C 2.0 mechanical disc, 160 mm rotor
Brake Lever	Alloy (Linear Pull) Black / Silver	--

Front	--	--
Rear	--	--

Colors

Metallic Red

Nautical Navy

Length	--	--
Weight	27.2 kg	13.28 kg

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	Cargo rack : Bontrager Carry Forward