Author Impulse 27.5 ASL 2021-22 vs Felt FR 30 2020

Speed	24	--
Frame	Alloy 6061 27.5" (ASL)	Felt Race Road Super Lite custom butted aluminum, Dynaform smooth welded construction, 68 mm BSA threaded bottom bracket shell, 12 x 142 mm Syntace style thru axle, flat mount disc brake standard, replaceable rear derailleur hanger
Stem	AUTHOR alloy	Devox, ±6¡ rise, ¯31.8 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 Ergonomic Road Design, short 65 mm reach, 125 mm drop, ¯31.8 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 Race Road UHC Advanced carbon fiber monocoque construction, size specific Control Taper carbon fiber steerer tube, integrated crown race, crown and blades. Flat mount disc standard, 12 x 100 mm thru axle
Seatpost	AUTHOR alloy (31.6)	Devox UHC Performance carbon fiber with microadjust head, 43 - 51 cm: ¯27.2 mm x 294 mm length, 54 - 61 cm: ¯27.2 mm x 344 mm length
Grip	AUTHOR high density foam	--
Crankset	--	Shimano 105 R7000, 52/36T, 43 - 47 mm: 165 mm, 51 cm: 170 mm, 54 - 56 cm: 172.5 mm, 58 - 61 cm: 175 mm
Pedals	Resin	--
Chain	KMC Z8.3	KMC X-11 EPT, 11-speed
Shifters	SHIMANO Altus (24)	Shimano 105 ST-R7020, 11-speed, 43 - 47 cm: Shimano 105 ST-R7025 Short-reach
Saddle	AUTHOR Fenix	Devox MIG
Headset	--	FSA integrated sealed cartridge bearing with Felt Variable Height Cone Spacers (20 mm PC, 4.5 mm aluminum), Felt top cap, 51 - 54cm: No.382, 1.125 - 1.25", 56 - 61 cm: No.42, 1.125 - 1.5"
Derailleur Front	SHIMANO TY700 (34.9)	Shimano 105 R7000 band-type, ¯34.9 mm
Derailleur Rear	SHIMANO Altus	Shimano 105 R7000 11-speed short 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, 11-30T
Bottom Bracket	VP COMP cartridge	--

Front	AUTHOR Speed Master 27.5" × 2.00"	Rubino IV G+ folding, 700 x 25c
Rear	AUTHOR Speed Master 27.5" × 2.00"	Rubino IV G+ folding, 700 x 25c
Wheel / RIM	Rims: AUTHOR Xenon 27.5 32 holes	Devox Road RSL1.9, 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-R7025, hydraulic

Front	--	--
Rear	--	--

Colors

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Midnight Blue Fade (Black) Charcoal Grey (Fire Fade)

Length	--	--
Weight	14 kg	8.70 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 Gel tape with reflective Felt Bubble-Tech F-Wing bar end plugs Bottom Bracket : Shimano 68mm BSA threaded Seatpost Clamp : Felt single bolt, ¯30.6 mm Thru Axles : Front: 12 x 100 x 123, thread: M12 x 1.5P x 16L, Maxle; Rear: 12 x 142 x 163 (163L + 9 head = 172 total), thread: M12 x 1.0P x 19L, Syntace
Accessories	--	Carbon assembly paste