Bicycle Archive · Specification report

2021 Specialized Turbo Como 4.0 650b

Velopedia Archive ID 900004281

Overview

Model year	2021
Brand	Specialized
Model	Turbo Como 4.0 650b
Bicycle type	Electric-assist
Archive ID	900004281
Original MSRP	$3,750.00
Colors	Charcoal / Black / Chrome
Sizes	S; M/L; XL

Frameset

Frame construction	E5 Aluminum, bottom bracket motor mount, fully integrated & lockable down tube battery, internal cable routing, fender/rack mounts, Smooth Welds
Frame material	Aluminum
Fork	Turbo Como aluminum disc fork, 15x100mm thru-axle
Fork material	Aluminum

Drivetrain

Shifters	Shimano Deore, RapidFire Plus, 10-speed w/ Optical Gear Display
Rear derailleur	Shimano Deore, Shadow Plus, GS cage, 10-speed
Crankset	Custom alloy forged crankarms; chainrings: Praxis, 48T, 104BCD
Cassette	Shimano Deore, 10spd, 11-42t
Chain	KMC X10eT, 10-speed w/ Missing Link™
Pedals	Specialized Commuter w/ grip tape & reflectors

Brakes

Brakes	(F) Shimano BR-MT200, hydraulic disc, 180mm / (R) Shimano BR-MT200, hydraulic disc, 160mm

Cockpit & contact points

Handlebar	Specialized, alloy, 30-degree backsweep, 26mm rise, 680mm width, 31.8mm
Stem	Specialized Flowset, 3D-forged alloy, 20-degree rise, 31.8mm clamp
Saddle	Body Geometry "The Cup," 6-degree rise, elastomer base, steel rails, SWAT™ compatible mounts, 245mm
Seatpost	Specialized, alloy, 2-bolt, 12.5mm offset, 30.9mm

Wheels & tires

Hubs	(F) Specialized front hub disc, sealed bearings, 15x100mm thru-axle, 32h / (R) Specialized, sealed cartridge bearings, 12x148mm thru-axle, 32h
Rims	650b disc, double-wall alloy, pinned, 32h
Spokes	DT Swiss Industry
Front tire	Nimbus II Sport Reflect, 60 TPI, 650b x 2.3"
Rear tire	Nimbus II Sport Reflect, 60 TPI, 650b x 2.3"

E-bike system

Motor	Specialized 1.2, custom Rx Street-tuned motor, 250W nominal
Battery	Specialized U1-500, On/Off button, state of charge display, 500Wh
Display/remote	Specialized TCD-W w/ handlebar remote & built-in anti-theft feature, Bluetooth® connectivity, 5 available display pages
Charger	Custom charger, 42V4A w/ Rosenberger plug, 100-240V

Geometry · S

Seat tube	420 mm
Effective top tube	620 mm
Head-tube angle	68°
Actual seat-tube angle	68°
Chainstay / rear center	485 mm
Wheelbase	1103 mm
Bottom-bracket drop	75 mm
Reach	337 mm
Stack	667 mm
Standover height	811 mm
Seatpost length	350 mm
Crank length	170 mm
Stem length	60 mm
Handlebar width	680 mm

Geometry · M/L

Seat tube	450 mm
Effective top tube	660 mm
Head-tube angle	68°
Actual seat-tube angle	68°
Chainstay / rear center	485 mm
Wheelbase	1142 mm
Bottom-bracket drop	75 mm
Reach	363 mm
Stack	699 mm
Standover height	835 mm
Seatpost length	350 mm
Crank length	170 mm
Stem length	60 mm
Handlebar width	680 mm

Geometry · XL

Seat tube	500 mm
Effective top tube	690 mm
Head-tube angle	68°
Actual seat-tube angle	68°
Chainstay / rear center	485 mm
Wheelbase	1171 mm
Bottom-bracket drop	75 mm
Reach	372 mm
Stack	675 mm
Standover height	884 mm
Seatpost length	400 mm
Crank length	175 mm
Stem length	60 mm
Handlebar width	680 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 25, 2026.