Reference

Specialized Turbo Tero 4.0: parts and specs

Replacement parts and specs for the Specialized Turbo Tero 4.0 with Shimano CUES 9-speed: Ground Control 29 x 2.35 tires, Tektro Gemini Comp brakes with 200 and 180 mm rotors, MasterMind TCD, U2-710 battery and 42V 4A charger.

Last edited Nov 9, 2026 by Pedalwise team Edit History Add a subpage

The Pedalwise team started this page from official manuals, support pages and repair videos. Fixed this yourself, or spotted something wrong? Help improve it.

Specs are for the stock bike as sold; check your own bike before you buy.

This page covers the Specialized Turbo Tero 4.0 in its Shimano CUES 9-speed build. It runs the Specialized 2.0 mid-drive motor (70 Nm, 250 W nominal); see Brose and Specialized motors explained. The wheels use a 15 x 110 mm front and 12 x 148 mm rear thru-axle. If your Tero 4.0 has a different drivetrain, or you ride a 3.0 or 5.0, match the parts on your bike before you order; the battery is shared across every Turbo Tero.

Photo needed: The Turbo Tero 4.0 from the drive side, showing the 9-speed cassette and 200 mm front rotor.. Add one

Electrical parts on this list must match this exact model and are fitted at the external plugs or by a pro. Never open the battery, controller, motor or display. Motor and battery service on this bike is dealer work: a Specialized dealer reads faults and updates firmware with its diagnostic tool.

Parts list

Tire: Specialized Ground Control, 2Bliss Ready, 29 x 2.35, front and rear.
Inner tube: Specialized Turbo Tube, 29 x 1.75 to 2.4.
Disc brake pads: resin pads, as fitted to the Tektro Gemini Comp calipers.
Brake rotor: 200 mm front, 180 mm rear.
Disc brake caliper: Tektro Gemini Comp hydraulic, front and rear.
Chain: Shimano LG500.
Cassette: Shimano CUES CS-LG300-9, 9-speed, 11 to 41T, with a Shimano CUES RD-U4000 derailleur and SL-U4000-9R shifter.
E-bike display: MasterMind TCD with handlebar remote, Bluetooth and a built-in anti-theft feature.
E-bike charger: custom 42V 4A charger with a Rosenberger plug, 100 to 240V input. The Turbo Battery Charger is the matching 42V 4A Rosenberger charger, $199.99 and shown unavailable online, read Nov 9, 2026.
E-bike battery: Specialized U2-710, alloy casing, 710Wh, with a state of charge display. The Specialized U2 Battery fits all Turbo Tero models; $1,199.99 and out of stock online, read Nov 9, 2026.
Grips: Specialized Trail Grips.
Pedals: Specialized Body Geometry Fitness platform, plastic.
Saddle: Bridge Sport, steel rails, 155 mm, on a TranzX 30.9 mm dropper post (100 mm on size S, 120 mm on M to XL).

Tools for common jobs

Hex keys: caliper, stem, handlebar and dropper clamp bolts.
Tire levers: changing a tube.
Floor pump with gauge: setting pressure within the sidewall range.
Torque wrench: brake bolts, stem and pedals, to your manual's values.
Pedal wrench: fitting new pedals; see replace pedals.
Brake pad spreader: resetting the pistons before new resin pads.
Brake bleed kit: bleeding the Tektro brakes, which use mineral brake oil; see bleed Tektro brakes.
Chain checker: catching chain wear early.
Chain lube: after cleaning, dusty trails and wet rides.
Chain tool: sizing a new chain.
Multimeter: testing charger output at its plug, as in check your charger. Never probe the battery.

Where to buy

Specialized: the U2 Battery and Turbo Battery Charger.
Independent sellers: parts suppliers.
A Specialized dealer orders and fits the battery and display: find a shop.

Common repairs

Sources

Stuck after these checks? Find a shop near you.

Need a pro?

If these steps didn't fix it, find a shop near you in our partner network. For battery or wiring trouble, look for shops marked Battery and electrical.

Talk

Questions, things that worked for you, or something that looks wrong on this page.

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