Velopedia Bicycle Archive

Surly Big Easy

Electric-assist bicycle from the Velopedia specification archive.

Model year: Not published by manufacturer
Original MSRP: $5,499.00
Sizes: Small; Medium; Large
Colors: Pile of Bricks Red
Geometry: 3 manufacturer sizes
Archive ID: 900000567
Catalog verified: August 14, 2026

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Frameset

Frame Construction	Surly Big Easy 2.0
Fork	Surly Dinner Fork

Drivetrain

Shifters	Shimano Cues U4000
Front Derailleur	N/A
Rear Derailleur	Shimano Cues U4000 GS
Crankset	FSA E-Bike CK-763/IS, paired with 38T FSA Chainring
Cassette	Shimano Cues LG400, 11-46t, 9 speed
Chain	KMC eGlide EPT Anti-Rust

Brakes

Brakes	Brake Calipers: Tektro HD-T740, 4 Piston; Brake Levers: Tektro HD-T740; Rotors: Tektro 203mm Front/180mm Rear, 6-Bolt

Cockpit & Contact Points

Headset	Cane Creek ViscoSet [tuned for Surly Big Easy] upper. 40 series lower
Handlebar	Surly Sunrise
Stem	Sunday Freeze Top Load 48mm
Saddle	WTB Volt
Seatpost	TransX JD-YSP15, 30.9mm Dropper Post; SM–MD; 120mm travel, LG; 150mm travel

Wheels & Tires

Hubs	(F) Novatec 15 x 110mm, 32h, 6 Bolt / (R) Novatec 12 x 148mm, 32h, 6 Bolt
Rims	Alex MD30, 26", 32h
Spokes	Straight 14g, Black
Front Tire	Surly Extra Terrestrial 26 x 2.5" 60tpi, Tubeless Compatible
Rear Tire	Surly Extra Terrestrial 26 x 2.5" 60tpi, Tubeless Compatible
Wheel Size	26"

Size-specific frame data

Geometry

3 sizes · 16 measurements

Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.

Measurement	Small	Medium	Large
Seat tube	410 mm	450 mm	500 mm
Effective top tube	570 mm	610 mm	650 mm
Head tube	130 mm	175 mm	220 mm
Head-tube angle	68°	68°	68°
Seat-tube angle	72.5°	72.5°	72.5°
Chainstay / rear center	830 mm	830 mm	830 mm
Wheelbase	1481 mm	1525 mm	1569 mm
Bottom-bracket drop	50 mm	50 mm	50 mm
Reach	396 mm	422 mm	449 mm
Stack	553 mm	595 mm	637 mm
Standover height	693 mm	720 mm	748 mm
Fork offset / rake	50 mm	50 mm	50 mm
Fork length / axle-to-crown	420 mm	420 mm	420 mm
Crank length	170 mm	175 mm	175 mm
Stem length	48 mm	48 mm	48 mm
Handlebar width	820 mm	820 mm	820 mm

Geometry source: Manufacturer HTML geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.