Polygon Urbano 3 vs Trek Marlin 4

Load Carrying Capacity	--	Combined weight of bicycle, rider, and cargo of 300 pounds (136 kg)
Frame	ALX Foldable Frame w/ Safety Lock & Magnetic	Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount, 135 x 5 mm QR
Stem	Alloy Foldable Stem	Size : XS - Bontrager alloy, 31.8 mm, Blendr compatible, 7 degree, 50 mm length ( Size : S - 60 mm length) Size : M - Bontrager alloy, 31.8 mm, Blendr compatible, 7 degree, 70 mm length Size : ML, L - Bontrager alloy, 31.8 mm, Blendr compatible, 7 degree, 80 mm length Size : XL, XXL - Bontrager alloy, 31.8 mm, Blendr compatible, 7 degree, 90 mm length
Handle Bar	Alloy w: 560mm Barbore: 25.4MM Bend: 6 Degree	Size : XS, S - Bontrager alloy, 31.8 mm, 5 mm rise, 690 mm width Size : M, ML, L, XL, XXL - Bontrager alloy, 31.8 mm, 5 mm rise, 720 mm width
Fork	ALX Rigid Fork	Size : XS - SR Suntour XCE 28, coil spring, preload, 42 mm offset for 27.5'' wheel, 100 mm QR, 80 mm travel Size : S - SR Suntour XCE 28, coil spring, preload, 42 mm offset for 27.5'' wheel, 100 mm QR, 100 mm travel Size : M, ML, L, XL, XXL - SR Suntour XCE 28, coil spring, preload, 46 mm offset for 29'' wheel, 100 mm QR, 100 mm travel
Seatpost	Alloy 34.9x580mm w/ Shim to 36.4mm	Size : XS, S - Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length Size : M - Bontrager alloy, 31.6 mm, 12 mm offset, 360 mm length Size : ML, L, XL, XXL - Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
Grip	--	Bontrager XR Endurance Comp, lock-on
Crankset	Alloy Crank Steel 52T W/ Double Chain Guard	Size : XS, S, M - Shimano Tourney TY301, 42/34/24, 170 mm length Size : ML, L, XL, XXL - Shimano Tourney TY301, 42/34/24, 175 mm length
Pedals	Foldable PP Cage Pedal w/ Reflector	VP-536 nylon platform
Chain	KMC Z-8.3 8-Speed	KMC Z7, 7 speed
Shifters	Shimano Altus Sl-M315 8-Speed	Shimano Altus EF500, 7 speed
Saddle	Entity Saddle Dia 7mm	Bontrager Arvada, steel rails, 138 mm width
Headset	ZS 44/28.6 | ZS 44/30	Semi-integrated, 1-1/8''
Derailleur Front	--	Shimano Tourney TY300, 34.9 mm clamp, down swing, down pull
Derailleur Rear	Shimano Claris RD-R2000 8-Speed	Shimano Tourney TY300, long cage, 34T max cog
Hub Front	--	Formula DC-31, alloy, 6-bolt, 6/7/8 speed freewheel, 135 x 5 mm QR
Hub Rear	--	Formula DC-20, alloy, 6-bolt, 5 x 100 mm QR
Spoke	--	14g stainless steel
Cassette	Shimano CS-HG200 12-32T 8-Speed	Shimano TZ500, 14-28, 7 speed
Chainrings	--	1x/2x : 34T, 3x : 42T
Bottom Bracket	Cartridge BB	VP BC73, 73 mm, threaded cartridge

Front	Kenda 20"x1.75"	Bontrager XR2 Comp, wire bead, 30 tpi, 29 x 2.20''
Rear	Kenda 20"x1.75"	Bontrager XR2 Comp, wire bead, 30 tpi, 29 x 2.00''
Wheel / RIM	20" Alloy Double Wall 28H	Bontrager Connection, double-wall, 32-hole, 20 mm width, schrader valve

Front	Mechanical Disc Brake Caliper IS	Tektro MD-M280 mechanical disc, 160 mm rotor
Rear	Mechanical Disc Brake Caliper IS	Tektro MD-M280 mechanical disc, 160 mm rotor

Front	--	--
Rear	--	--

Colors

Black Pink

Matte Trek Black Voodoo Aloha Green Matte Anthracite Magenta

Length	--	--
Weight	--	13.98 kg

Features	--	- Rack Mounts - Rear Kickstand Mount - Internal Cable Routing
Additional Details	--	Max compatible fork travel : 100 mm (XS & S: 490 mm axle-to-crown, M & up: 509 mm axle-to-crown)