Author Impulse 27.5 ASL 2021-22 vs Felt VR30 2019

Speed	24	--
Frame	Alloy 6061 27.5" (ASL)	Felt Variable Road Disc FLite custom butted aluminum, hydroform smooth welded construction, BB386 bottom bracket shell, 12 x 142 mm with Syntace style thru axle, flat mount disc brake standard, replaceable rear derailleur hanger, internal mechanical cable routing Shock:
Stem	AUTHOR alloy	Devox VariableAngle, ±8°/±16° rise, Ø31.8 mm, 43 cm: 70 mm, 47 cm : 80 mm, 51 cm: 90 mm, 54 - 56 cm: 100 mm, 58 cm: 110 mm, 61 cm: 120 mm
Handle Bar	AUTHOR 8° 640 / 660 mm	Devox Road Endurance, 65mm reach, 125 mm drop, Ø31.8 mm, 43-47 cm: 380 mm, 51 cm: 400 mm, 54 - 56 cm: 420 mm, 58 - 61 cm: 440 mm
Fork	Front: RST Gila 27.5 ML lock out (100 mm)	Felt Variable Road UHC Advanced carbon fiber monocoque construction, size specific Control Taper carbon fiber steerer tube, crown, blades with flat mount disc standard and 12 x 100 mm thru axle
Seatpost	AUTHOR alloy (31.6)	Devox UHC Performance carbon fiber with microadjust head, Ø27.2 mm x 344 mm length
Grip	AUTHOR high density foam	--
Crankset	--	FSA Omega BB386 EVO, 50/34T, 43 - 47 cm: 165 mm, 51 cm: 170 mm, 54 - 56 cm: 172.5 mm, 58 - 61 cm: 175 mm
Pedals	Resin	--
Chain	KMC Z8.3	Shimano 11-speed
Shifters	SHIMANO Altus (24)	Shimano 105 ST-R7020, 11-speed, 43 - 47 cm: Shimano 105 ST-R7025 Short-reach
Saddle	AUTHOR Fenix	Prologo Scratch Space
Headset	--	FSA integrated sealed cartridge bearing with Felt Variable Height Cone Spacers (20 mm PC, 4.5 mm aluminum), Felt top cap, 43 - 47 cm: IS-21, 1.125", 51 - 61 cm: No.42, 1.125 - 1.5"
Derailleur Front	SHIMANO TY700 (34.9)	Shimano 105 R7000 clamp-on, Ø34.9 mm
Derailleur Rear	SHIMANO Altus	Shimano 105 R7000 11-speed long cage
Hub Front	QUANDO Disc 32 holes	Devox RSL3D, sealed cartridge bearing, 11-speed, 12 x 142 mm thru axle, Center Lock, 28H
Hub Rear	--	Devox RSL3D, sealed cartridge bearing, 12 x 100 mm thru axle, Center Lock, 28H
Spoke	Black steel	2.0 mm stainless steel
Cassette	--	Shimano 11-speed, 11-34T
Bottom Bracket	VP COMP cartridge	--

Front	AUTHOR Speed Master 27.5" × 2.00"	Vittoria Zaffiro Folding, 700 x 28c
Rear	AUTHOR Speed Master 27.5" × 2.00"	Vittoria Zaffiro Folding, 700 x 28c
Wheel / RIM	Rims: AUTHOR Xenon 27.5 32 holes	Devox Variable Road VR1.9, tubeless compatible 19 mm inner width, 23 mm depth

Front	TEKTRO disc hydraulic (6" rotors)	Shimano 105 BR-R7070 hydraulic disc, 160 mm rotor
Rear	TEKTRO disc hydraulic (6" rotors)	Shimano 105 BR-R7070 hydraulic disc, 140 mm rotor
Brake Lever	TEKTRO WS	Shimano 105 ST-R7020, hydraulic 43 - 47 cm: Shimano 105 ST-R7025 Short-reach

Front	--	--
Rear	--	--

Colors

--

Red & Black

Length	--	--
Weight	14 kg	--

Features	--	--
Additional Details	SIZE : 16", 18" HEAD PARTS: PRESTINE Integrated 1-1/8" CHAIN WHEEL : PROWHEEL 42-34-24 teeth 170 mm cranks FREE WHEEL: SHIMANO HG200-8 12-32 (8) SEAT CLAMP: AUTHOR (34.9)	Bar tape : Felt VelvetGel tape with 3M reflective base with reflective Felt Bubble-Tech F-Wing bar end plugs Bottom Bracket : FSA BB386 with 30 mm bearings Seatpost Clamp : Felt single bolt, Ø31.8 mm Thru axle : Front: Devox leverless 12 x 100 x 123L, thread: M12 x 1.5 x 15L; Rear: Devox leverless 12 x 142 x 166L Syntace style, thread: M12 x 1.0 x 15L