Velotric GoMad: parts and specs
Replacement parts and specs for the Velotric GoMad: Kenda 20 x 4.0 tires, Tektro hydraulic brakes with 203 and 180 mm rotors, 8-speed 11 to 34T, 750 W hub motor, 3.5 inch display, 48V 801.6 Wh battery and 48V 3A charger.
The Pedalwise team started this page from official manuals, support pages and repair videos. Fixed this yourself, or spotted something wrong? Help improve it.
Tools
This page lists the common replacement parts for the Velotric GoMad, the 20" utility bike sold from 2025. Specs are for the stock bike as sold, read Nov 9, 2026; check your own bike before you buy. Full specs are on Velotric's GoMad product page.
Photo needed: The GoMad from the side, showing the 20 x 4.0 tires, suspension fork and long rear rack. For photos, see Velotric's product page linked above.. Add one
Electrical parts on this list must match this exact model, and they are fitted at the external plugs or by a pro. Never open the battery, controller, motor or display. For battery and charger trouble, start with battery won't charge and e-bike battery care.
Parts list
- Tire: Kenda 20" x 4.0" puncture resistant e-bike tire. Use the pressure range on the sidewall.
- Brake rotor: 203 mm front, 180 mm rear.
- Disc brake caliper: Tektro hydraulic.
- Brake lever: aluminum levers with power cutoff.
- Chain: KMC 8-speed with a 52T narrow wide chainring and 165 mm cranks.
- Freewheel: 8-speed, 11 to 34T, with a Shimano 8-speed derailleur and shifter.
- Hub motor: 48V hub, 750 W rated, 1300 W peak, 85 Nm.
- E-bike display: 3.5" full color with Bluetooth and NFC and an adjustable angle.
- Throttle: removable trigger throttle.
- Pedal assist sensor: torque and cadence sensing (SensorSwap).
- E-bike charger: 48V, 3A. Velotric's charger page has a GoMad option at $54.99, with Standard and Slim versions, $54.99 to $69.99 across versions, read Nov 9, 2026.
- E-bike battery: 48V, 16.7Ah, 801.6 Wh, IPX7, UL 2271, Samsung or LG 21700 cells. Velotric's Extra Battery Pack has a 16.7Ah option for the GoMad, $349.99 to $549.99 across options, read Nov 9, 2026. Velotric's Battery Terminal Cover fits the Discover 2, Discover 3, Discover M, Summit 1, Summit 2, Nomad 2, Nomad 2X and GoMad, $30.99, sold out, read Nov 9, 2026.
- E-bike lights: 500 lumen integrated front light; rear light with brake and turn signals in the rack.
- Grips: ergonomic grips on a 700 mm BMX style bar.
- Pedals: plastic.
- Saddle: Velotric comfort ergonomic seat.
Tools for common jobs
- Tire levers: getting the 4" tire off the rim.
- Floor pump with gauge: filling to the sidewall range.
- Tire pressure gauge: checking low fat tire pressure accurately.
- Hex keys: the front wheel uses a 15 x 135 mm thru-axle; stem, seatpost and rack bolts.
- Axle nut wrench: removing the rear hub motor wheel; the nut size isn't published, so measure yours.
- Torque wrench: axle, stem and rack bolts to the values in your manual. Racks carrying passengers or cargo need correct torque.
- Chain checker: measuring wear on the 8-speed chain.
- Chain tool: fitting a new chain.
- Chain lube: regular chain care.
- Brake pad spreader: keeping the Tektro pads apart with a wheel out.
- Brake bleed kit: bleeding the Tektro hydraulic brakes. See bleed Tektro hydraulic brakes for the fluid.
- Bike repair stand: the GoMad weighs 77 lb, so use a heavy duty stand or work on the ground.
Where to buy
- Velotric's charger page, Extra Battery Pack, batteries and chargers listing and accessories and parts listing, read Nov 9, 2026.
- Velotric support for the tire, controller, display and brake parts. Have your frame size ready.
- Independent sellers: parts suppliers.
- A shop can order and fit parts: find a shop.
Common repairs
- Velotric troubleshooting and motor not responding when powered on
- Fix a flat on a rear hub motor wheel and replace disc brake pads
- Bleed Tektro hydraulic brakes and check and replace a chain
Sources
- GoMad product page, velotricbike.com
- charger page, velotricbike.com
- Extra Battery Pack, velotricbike.com
- batteries and chargers listing, velotricbike.com
- accessories and parts listing, velotricbike.com
- Battery Terminal Cover, velotricbike.com
Stuck after these checks? Find a shop near you.
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.
Sign in to join the conversation.
CC BY-NC-SA 4.0Text by Pedalwise and contributors, shared under CC BY-NC-SA 4.0. Linked videos and manuals keep their own terms. How to reuse it