Author Traction 27.5 2021-22 vs Trek 520 Grando

Load Carrying Capacity	--	Combined weight of bicycle, rider, and cargo of 275 pounds (125 kg)
Frame	Double butted hydroformed alloy 6061 27.5"	Trek butted chromoly disc touring, rack & fender mounts, 135 x 5 mm QR
Stem	AUTHOR alloy	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	AUTHOR 9° 680 / 700 mm	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	RST Aerial 27.5 15 TRL air, remote lock out (100 mm)	520 alloy disc touring, rack mounts, 100 x 5 mm ThruSkew
Seats	Seat Clamp : AUTHOR (34.9)	--
Seatpost	AUTHOR alloy (31.6)	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	AUTHOR Pro Lock	--
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	AUTHOR alloy	Wellgo nylon body, alloy cage
Chain	KMC X10	KMC X10, 10 speed
Shifters	SHIMANO Deore (20)	Shimano Tiagra R4700, 10 speed
Saddle	AUTHOR Navigator	Bontrager Arvada, steel rails, 138 mm width
Headset	--	1-1/8'' threadless, sealed cartridge bearings
Derailleur Front	SHIMANO Deore (34.9)	Shimano Tiagra 4700, 34.9 mm clamp, down swing
Derailleur Rear	SHIMANO Deore	Shimano GRX RX400, long cage, 36T max cog
Hub Front	--	Shimano M475, 6-bolt disc, 135 x 5 mm QR
Hub Rear	AUTHOR Radon 32 holes	Shimano M475, 6-bolt disc, 100 x 5 mm QR
Spoke	Black stainless steel 2.0 mm	14g stainless steel
Cassette	--	Shimano HG50, 11-36, 10 speed
Bottom Bracket	SHIMANO BB-52 BB unit	--

Front	VITTORIA Barzo foldable 27.5" × 2.25"	Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700 x 40c
Rear	VITTORIA Barzo foldable 27.5" × 2.25"	Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700 x 40c
Wheel / RIM	Rims : AUTHOR Xenon TRC 27.5 32 holes	Bontrager Affinity Disc, Tubeless Ready, 36-hole, 21 mm width, presta valve

Front	TEKTRO Gemini disc hydraulic (6" rotors)	TRP Spyre C 2.0 mechanical disc, 160 mm rotor
Rear	TEKTRO Gemini disc hydraulic (6" rotors)	TRP Spyre C 2.0 mechanical disc, 160 mm rotor
Brake Lever	TEKTRO Gemini	--

Front	--	--
Rear	--	--

Colors

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Nautical Navy

Length	--	--
Weight	13 kg	13.28 kg

Features	--	--
Additional Details	SIZE :15", 17", 19" HEAD PARTS: AUTHOR Integrated 1.5" tapered CHAIN WHEEL : SHIMANO M4100-2 36-26 teeth 170 / 175 mm cranks FREE WHEEL: SHIMANO CS-M4100-10 11-42 (10)	Cargo rack : Bontrager Carry Forward