Brompton A Line vs Felt IA Advanced Ultegra DI2

Drivetrain	Brompton 3 speed drivetrain, 177% range	--
Riding Modes	3 Speed (Utility)	--
Frame	Main Frame: Precision drawn heat-treated steel tubing with hand brazing and selected auto-brazed joints Rear Frame: Hand brazed cold-formed micro-alloy steel tubing	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
Handle Bar	Mid handlebar	Devox Bayonet 3.1 base bar with Devox Ergomod extensions, ¯31.8 mm, 48 - 51 cm: 390 mm, 54 - 58 cm: 420 mm
Fork	Steel Brazed 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
Seatpost	Extended, Silver (35")	Felt VariMount Aero Tri UHC Advanced carbon fiber, 300 mm length
Grip	Push-on Rubber Grips	--
Crankset	--	Shimano Ultegra R8000, 52/36T, 48 -51 cm: 165 mm, 54 -56 cm: 170 mm, 58 cm: 172.5 mm
Pedals	Non-folding Composite Pedals	--
Chain	6061 forged aluminium crank with 44T chainring and integrated chainguard	Shimano 11-speed
Shifters	Brompton 3 Speed Shifter	Shimano Dura-Ace Di2 R9160 (aero extension) with right hand SW-R600 secondary shifter (base bar)
Saddle	A Line saddle with black rails 147mm width Composite seat clamp and rear frame clip in matt black finish	ISM PS1.0
Headset	Brompton 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	Brompton Chain Pusher	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
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	13 Tooth	--
Bottom Bracket	Square taper bottom bracket	--

Front	Schwalbe Marathon Racer	Continental Grand Sport Race folding, 700 x 25c
Rear	Schwalbe Marathon Racer	Continental Grand Sport Race folding, 700 x 25c
Wheel / RIM	Rear Wheel: Double-wall rim, 28 spoke, Brompton Standard ratio 3 speed internal gear hub, 13 tooth sprocket Front Wheel: Double wall rims, 28 spokes laced to a Brompton front hub	Reynolds AR58/62 DB Custom carbon, tubeless ready, 21 mm inner width, 58 mm depth front, 62 mm depth rear
Tube	Schrader Valve	--

Front	Brompton A Line calipers	TRP HD-T910 hydraulic disc, 140 mm rotor
Rear	Brompton A Line calipers	TRP HD-T910 hydraulic disc, 140 mm rotor
Brake Lever	--	TRP HD-T910 hydraulic with integrated secondary shift buttons (right lever only)

Front	--	--
Rear	--	--

Colors

White

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

Length	--	--
Weight	11.5 kg	9.55 kg

About	The Brompton A Line is a practical bicycle designed with a focus on utility. Its technical spec Read More	--
Features	- 3 Easy to use hub gears - Folds in 20 seconds	--
Additional Details	Folded Size: 25.3' H' x 23'' W x 10.6'' D Hinge Clamps: Composite hinge clamp levers	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
Accessories	--	Carbon assembly paste, Aero seatpost slot covers, IA CALpac 2.0, Di2 Internal battery charger, IA BTSpac storage box, Tubeless valve stems