Felt IA Advanced Ultegra DI2 vs Montague Allston

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	6061 series aluminum with DirectConnect System. Seatstay splitter for belt drive and eccentric bottom bracket
Stem	Felt Dagger 31.8 Cold Forged	Kalloy, Alloy direct connect. 15 degree rise
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	Riser style 20mm rise. 580mm wide. Alloy
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	Full Cro-Mo, with disc mount and ramped dropout.
Seats	--	Full Cro-Mo, with disc mount and ramped dropout
Seatpost	Felt VariMount Aero Tri UHC Advanced carbon fiber, 300 mm length	30.0 X 300mm Alloy with Montague logo
Crankset	Shimano Ultegra R8000, 52/36T, 48 -51 cm: 165 mm, 54 -56 cm: 170 mm, 58 cm: 172.5 mm	Gates 46T for belt drive. 170mm crank arm
Pedals	--	Platform trekking pedal. Aluminum Cage
Chain	Shimano 11-speed	--
Shifters	Shimano Dura-Ace Di2 R9160 (aero extension) with right hand SW-R600 secondary shifter (base bar)	Shimano Alfine Rapid Fire trigger shifters
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	--
Derailleur Front	Shimano Ultegra R8050 Di2 braze-on	--
Derailleur Rear	Shimano Ultegra R8050 Di2 11-speed short cage	Shimano Alfine 11-speed internal gear hub.
Hub Front	Reynolds Series 1, straight-pull design, 4 pawl, 24T ratchet, 11-speed XDR driver, 12 x 142 mm thru axle, Center Lock	--
Hub Rear	Reynolds Series 1, straight-pull design, 12 x 100 mm thru axle, Center Lock	--
Spoke	Sapim Sprint bladed	--
Cassette	Shimano 11-speed, 11-28T	--
Sprocket	--	Gates belt drive CDX sprocket. 24T

Front	Continental Grand Sport Race folding, 700 x 25c	Vee Rubber trekking tire. 700c x 38mm
Rear	Continental Grand Sport Race folding, 700 x 25c	Vee Rubber trekking tire. 700c x 38mm
Wheel / RIM	Reynolds AR58/62 DB Custom carbon, tubeless ready, 21 mm inner width, 58 mm depth front, 62 mm depth rear	Spoke

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

Front	--	--
Rear	--	--

Colors

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

Gloss Black/Red

Length	--	--
Weight	9.55 kg	13.6 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	Bottom Bracke : Sealed Cartridge Folded Size : 914 x 711 x 304 mm
Accessories	Carbon assembly paste, Aero seatpost slot covers, IA CALpac 2.0, Di2 Internal battery charger, IA BTSpac storage box, Tubeless valve stems	--