Brompton C Line Explore Black - High vs Trek 820

Load Carrying Capacity	--	Combined weight of bicycle, rider, and cargo of 300 pounds (136 kg)
Drivetrain	Brompton Wide-range 6 speed drivetrain (2 x 3 speed), 302% range	--
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	Trek Custom Steel, rack mounts, 135 x 5 mm QR
Stem	--	Size : XS - Bontrager alloy, 31.8 mm, Blendr compatible, 7 degree, 60 mm length Size : S - Bontrager alloy, 31.8 mm, Blendr compatible, 7 degree, 80 mm length Size : M/L, L - Bontrager alloy, 31.8 mm, Blendr compatible, 7 degree, 90 mm length Size : XL - Bontrager alloy, 31.8 mm clamp, Blendr compatible, 7 degree, 100 mm length
Handle Bar	High Handlebars – Brompton triple butted 6061 aluminium handlebar with shot-peened finish	Size : XS, S - Bontrager alloy, 31.8 mm, 15 mm rise, 660 mm width Size : M/L, L, XL - Bontrager alloy, 31.8 mm, 15 mm rise, 690 mm width
Fork	Steel brazed fork	SR Suntour M-3030, coil spring, 100 x 5 mm QR, 75 mm travel
Seatpost	Brompton standard length Chromoly steel tube. Suitable for maximum inside leg 33″/84cm	Size : XS, S - Bontrager alloy, 29.2 mm, 12 mm offset, 300 mm length Size : M/L, L - Bontrager alloy, 29.2 mm, 12 mm offset, 330 mm length Size : XL - Bontrager alloy, 29.2 mm, 12 mm offset, 400 mm length
Grip	Lock-on grips with soft-compound rubber adhered to an engineered core	Bontrager SSR
Crankset	--	Shimano Tourney TY301, 42/34/24, 170 mm length
Pedals	Brompton Folding left hand and non-folding right-hand pedals	VP-536 nylon platform
Chain	--	KMC Z7, 7 speed
Shifters	Brompton 2 and 3 speed Trigger shifters	Shimano Tourney EF41, 7 speed
Saddle	Brompton saddle with integrated carry handle. Incorporates a mount for a Brompton rear light and saddle bag	Bontrager Sport
Headset	Brompton headset	1-1/8'' threadless
Derailleur Front	--	Shimano Tourney TY500, 31.8 mm clamp, top swing, dual pull
Derailleur Rear	--	Shimano Tourney TY300, long cage, 34T max cog
Hub Front	--	Formula FM31 alloy, 7sp freewheel, 135 x 5 mm QR
Hub Rear	--	Formula FM21 alloy, 100 x 5 mm QR
Spoke	--	Bontrager Approved
Cassette	--	Shimano TZ500, 14-28, 7 speed
Chainrings	44T (-12% gearing)	42 / 34 / 24
Bottom Bracket	Square taper bottom bracket	--

Front	349 x 35C Schwalbe Marathon Racer. A puncture resistant tyre with a reflective sidewall	Frame : 26 x 2.00" Fork : See manufacturer
Rear	349 x 35C Schwalbe Marathon Racer. A puncture resistant tyre with a reflective sidewall	Frame : 26 x 2.00" Fork : See manufacturer
Wheel / RIM	Front-wheel: Double-wall rim, 28 spokes laced to a Brompton front hub. Rear-wheel: Double wall rim, 28 spoke, Brompton Wide ratio 3 speed internal gear hub with 2 speed external gears (13 and 16 tooth)	Bontrager AT-550, alloy, 36-hole, schrader valve
Tube	Schrader valve	--

Front	Brompton Dual Pivot Calipers	Tektro alloy linear-pull
Rear	Brompton Dual Pivot Calipers	Tektro alloy linear-pull

Front	--	--
Rear	--	--

Colors

Black (matt)

Matte Trek Black

Length	--	--
Weight	12.1 kg	15.28 kg

Features	--	--
Additional Details	Folded Size : 645mm (H) x 565mm (W) x 270mm (D) (25.3” x 23” x 10.6”) Front carrier : Front carrier block adaptor for all types of Brompton luggage Mudguards : Mudguards with rubberised flap	Max compatible fork travel : 75 mm