Reference

Rad Power Bikes RadRunner 3 Plus: parts and specs

Replacement parts and specs for the RadRunner 3 Plus: Kenda K905 20 x 3.3 tires, Tektro HD-E350 hydraulic brakes with 180 mm rotors, 7-speed freewheel, semi-integrated battery and charger, with Rad's part links and prices.

Last edited Nov 8, 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.

Battery and electrical safety. Lithium-ion batteries can catch fire if they're damaged or charged wrong. Never open a battery pack, and stop using any battery that's swollen, hot, wet or smells burnt. Every edit to this page is checked by a second person before it goes live.

This page lists the common replacement parts for the Rad Power Bikes RadRunner 3 Plus, the RadRunner with hydraulic brakes, a semi-integrated battery and a dual-screen LCD. Specs come from Rad's RadRunner 3 Plus product page and Rad's own parts listings, read Nov 9, 2026.

Photo needed: The RadRunner 3 Plus from the side, with the battery in place. For photos, see Rad's RadRunner 3 Plus 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 K905, 20" x 3.3", with K-Shield puncture protection (product page). Rad's Kenda K-Rad 20" x 3.3" tire names the RadRunner 3 Plus as compatible, $65, out of stock, read Nov 9, 2026.
Inner tube: Rad's 20" x 4" inner tube is Schrader and names the RadRunner 3 Plus, $22, read Nov 9, 2026.
Disc brake pads: the product page lists semi-metallic pads. Rad's Tektro E10.11 organic pads name the RadRunner 3 Plus as compatible, $25, on back order, read Nov 9, 2026.
Brake rotor: Tektro, 180 mm (product page).
Disc brake caliper: Tektro HD-E350 hydraulic disc (product page). See bleed hydraulic disc brakes.
Brake lever: hydraulic, part of the HD-E350 system. Rad's mechanical brake lever listing excludes the RadRunner 3 Plus.
Freewheel: 7-speed, 11 to 34T, with a Shimano 7-speed derailleur and thumb shifter and a 48T crank (product page).
Hub motor: 750 W rated rear hub motor (product page).
E-bike controller: inside the down tube, under the bottom bracket. Rad's RadRunner 3 Plus controller guide names the harness, power and motor cables, and says the controller is replaced only when Rad support finds it defective, so start with Rad support.
E-bike display: LCD dual-screen display (product page).
Throttle: half-twist throttle (product page).
Pedal assist sensor: pedal cadence sensor with 5 levels plus zero (product page).
E-bike charger: 48V, 2A smart charger (product page). Rad's Rad Battery Charger (MY2025), $65, out of stock, read Nov 9, 2026.
E-bike battery: 14Ah, 672 Wh, semi-integrated (product page). Rad's Safe Shield Advanced Semi-Integrated Battery (15 Ah) lists the RadRunner 3 Plus as an upgrade or spare, $599, out of stock, read Nov 9, 2026. Rad says it needs its updated 2025 charger.
E-bike lights: auto-on LED headlight and integrated taillight with brake light (product page). Rad's lights page lists a RadRover 6 Plus and RadRunner 3 Plus taillight at $27.50, out of stock, read Nov 9, 2026.
Grips: lock-on ergonomic comfort grips (product page).
Pedals: forged aluminum platform, 9/16" x 20 TPI (product page).

Where to buy

Rad's own spare parts store: tires, tubes, brakes and lights. Many items showed as out of stock on Nov 9, 2026, so check back or ask Rad support.
For a part Rad doesn't list, such as a controller or motor, contact Rad support first, since its guides say the replacement comes from Rad.
Independent sellers are listed on our parts suppliers page.
A local shop can order and fit parts: find a shop.

Common repairs

Videos

RadRunner 3 Plus Assembly, Rad Power Bikes from Rad Power Bikes: Rad's assembly video for the RadRunner 3 Plus, showing the stock parts as they go on the bike.

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.

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