Felt AR Advanced Ultegra DI2 vs Marin Sky Trail

Drivetrain	--	Shimano Altus 3x8 drivetrain
Frame	TeXtreme carbon fiber, MMC with InsideOut construction, carbon fiber BB386 bottom bracket shell, 12 x 142 mm Syntace style thru axle, flat mount disc brake standard, aluminum replaceable rear derailleur hanger, internal electronic-specific cable routing, and high-frequency vibration reducing seat post insert	Series 1 6061 Aluminum, 27.5” Wheels, 68mm BB shell, 135mm Forged Dropouts, Disc Brake
Stem	AR integrated carbon with internal cable and hose routing -6¡ rise, ¯31.8 mm, 48 - 51 cm: 90 mm, 54 - 56 cm: 100 mm, 58 cm: 110 mm, 61 cm: 120 mm	Alloy, 45 mm
Handle Bar	Devox Carbon Aero, 80 mm reach, 125 mm drop, ¯31.8 mm, 48 - 54 cm: 400 mm, 56 - 61 cm: 420 mm	Alloy, 20 mm rise, 740 mm wide
Fork	Felt Aero Road UHC Advanced + TeXtreme carbon fiber monocoque construction, AeroTaper 1.125" - 1.25" carbon fiber steerer tube, integrated crown race, crown and blades. Flat mount disc standard, 12 x 100 mm thru axle	--
Seatpost	Felt VariMount Aero Road UHC Advanced + TeXtreme carbon fiber with high-frequency vibration reducing insert, integrated battery holder, 350 mm length*, 0/20 mm offset *Seatpost can be cut to length	Alloy, 27.2 mm
Grip	--	Entity MTB
Crankset	Shimano Ultegra R8000, 52/36T, 48 cm: 165 mm, 51 cm: 170 mm, 54 - 56 cm: 172.5 mm, 58 - 61 cm: 175 mm	Forged Aluminum, 42x34x24T, 170mm
Pedals	--	Nylon Platform
Chain	Shimano 11-speed	KMC Z-7
Shifters	Shimano Ultegra Di2 R8070 11-speed	--
Saddle	Prologo Dimension T4.0	Entity MTB
Headset	FSA integrated sealed cartridge bearings MR121 {870E-RS} Upper bearing and MR168 {970E-RS} lower bearing with integrated aero headset spacers and integrated top cover for use with non-integrated stem	Zero Stack (ZS) Threadless, ZS 44/28.6 | 44/30
Derailleur Front	Shimano Ultegra R8050 Di2 braze-on	Shimano Altus
Derailleur Rear	Shimano Ultegra R8050 Di2 11-speed short cage	Shimano RD-TX800, 8-Speed
Hub Front	Reynolds Series 1, straight-pull design, 4 pawl, 24T ratchet, 11-speed, 12 x 142 mm thru axle, Center Lock	QR Alloy, 6-bolt
Hub Rear	Reynolds Series 1, straight-pull design, 12 x 100 mm thru axle, Center Lock	QR Alloy, 6-bolt
Spoke	Sapim Sprint bladed	Stainless Steel, Brass Nipples
Cassette	Shimano 11-speed, 11-30T	Shimano Altus CS-HG200, 11-32T, 8 Speed
Bottom Bracket	--	Sealed Cartridge Bearings, Square Taper

Front	Continental Grand Prix 5000 folding, 700 x 25c	MTB, 27.5 x 2.1"
Rear	Continental Grand Prix 5000 folding, 700 x 25c	MTB, 27.5 x 2.1"
Wheel / RIM	Reynolds AR58 DB Custom carbon, tubeless ready, 21 mm inner width, 58 mm depth	Double-Wall Alloy Rims, 32H

Front	Shimano BR-R8070 hydraulic disc, 160 mm rotor	Alhonga HJ-OD07, Hydraulic Disc, 160 mm Rotor, Shimano M515 Pad Compatible
Rear	Shimano BR-R8070 hydraulic disc, 140 mm rotor	Alhonga HJ-OD07, Hydraulic Disc, 160 mm Rotor, Shimano M515 Pad Compatible
Brake Lever	Shimano Ultegra R8070, hydraulic	Alhonga Hydraulic

Front	--	SR Suntour XCE, 100mm Travel, Preload Adjustment
Rear	--	--

Colors

Aquafresh / TeXtreme White / TeXtreme (Green)

Red/Charcoal

Length

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Features	--	--
Additional Details	Bar Tape : Felt VelvetGel tape with 3 M reflective base with Felt Bubble-Tech F-Wing bar end plugs Bottom Bracket : Token BB386 with 24 mm bearings Seatpost Clamp : Felt Internaloc integrated with titanium bolts Thru Axle : Front: 12 x 100 x 118, thread: M12 x 1.5P x 13L, Maxle; Rear: 12 x 142 x 161 (161L + 9 head = 170 total), thread: M12 x 1.0P x 18L, Syntace	Shift Lever : Shimano Altus, 3x8 Speed Size Range : S, M, L
Accessories	- Carbon assembly paste - Chain plate protector - Tubeless valve stems - Aero seatpost slot covers - Di2 battery charger - Headset top cover for use with non-integrated stem	--