Felt IA Advanced Ultegra DI2 vs Mafiabikes Chenga

Frame	Felt Integrated Aero Tri Disc UHC Advanced + TeXtreme carbon fiber, MMC with Inside Out construction, 68 mm BSA threaded bottom bracket shell, 12 x 142 mm with Syntace style thru axle, flat mount disc brake standard, horizontal dropouts, replaceable rear derailleur hanger, internal mechanical or electronic cable routing	--
Stem	Felt Dagger 31.8 Cold Forged	Mafia bikes forged top load
Handle Bar	Devox Bayonet 3.1 base bar with Devox Ergomod extensions, ¯31.8 mm, 48 - 51 cm: 390 mm, 54 - 58 cm: 420 mm	--
Fork	Felt Dagger Disc UHC Advanced carbon fiber monocoque construction, 1.125" carbon fiber steerer, upper cover, blades, dropouts, crown; internal disc-brake routing, flat-mount disc brake standard, 12 x 100 mm thru axle	4130 cro-mo, tapered blades CNC machined top cap
Seats	--	Mafia suede wheelie
Seatpost	Felt VariMount Aero Tri UHC Advanced carbon fiber, 300 mm length	Micro adjust seatpost
Grip	--	Lucky 6
Crankset	Shimano Ultegra R8000, 52/36T, 48 -51 cm: 165 mm, 54 -56 cm: 170 mm, 58 cm: 172.5 mm	Samox cranks
Pedals	--	Alloy
Chain	Shimano 11-speed	--
Shifters	Shimano Dura-Ace Di2 R9160 (aero extension) with right hand SW-R600 secondary shifter (base bar)	--
Gear	--	Microshift XLE 10 speed (11-42)
Saddle	ISM PS1.0	--
Headset	FSA integrated, 1.125" 36¡/45¡ sealed ACB cartridge bearings MR122 {873E-RS}, split top race H2145 {No.11AGY-2} with Felt compression device	Sealed integrated
Derailleur Front	Shimano Ultegra R8050 Di2 braze-on	--
Derailleur Rear	Shimano Ultegra R8050 Di2 11-speed short cage	--
Hub Front	Reynolds Series 1, straight-pull design, 4 pawl, 24T ratchet, 11-speed XDR driver, 12 x 142 mm thru axle, Center Lock	Solid axle alloy
Hub Rear	Reynolds Series 1, straight-pull design, 12 x 100 mm thru axle, Center Lock	Solid axle alloy
Spoke	Sapim Sprint bladed	--
Cassette	Shimano 11-speed, 11-28T	10 speed cassette (11-42t)
Sprocket	--	CNC machined 7075 sprocket w/ thick thin teeth for optimal chain retention
Bottom Bracket	--	Hollotech BB

Front	Continental Grand Sport Race folding, 700 x 25c	Lagos 2.5 snakeskin
Rear	Continental Grand Sport Race folding, 700 x 25c	Lagos 2.5 snakeskin
Wheel / RIM	Reynolds AR58/62 DB Custom carbon, tubeless ready, 21 mm inner width, 58 mm depth front, 62 mm depth rear	Super wide double wall

Front	TRP HD-T910 hydraulic disc, 140 mm rotor	Tektro Hydraulic disc brake
Rear	TRP HD-T910 hydraulic disc, 140 mm rotor	Tektro Hydraulic disc brake
Brake Lever	TRP HD-T910 hydraulic with integrated secondary shift buttons (right lever only)	--

Front	--	--
Rear	--	--

Colors

Matte TeXtreme (White Geo) Matte TeXtreme (Spatter, Gloss Charcoal)

Red Grey Blue White Teal White Black

Length	--	--
Weight	9.55 kg	39 kg

Features	--	--
Additional Details	Bar tape : Devox Gel tape and new EVA arm pads with anti-microbial cover Bottom Bracket : Shimano Hollowtech BSA threaded 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 163 (163L + 9 head = 172 total), thread: M12 x 1.0P x 19L, Syntace	Rear Mech : Microshift XLE
Accessories	Carbon assembly paste, Aero seatpost slot covers, IA CALpac 2.0, Di2 Internal battery charger, IA BTSpac storage box, Tubeless valve stems	--