Reference

Rad Power Bikes RadRunner 1 and RadRunner 2: parts and specs

Replacement parts and specs for the RadRunner 1 and 2: 20 x 3.3 tires, Schrader tubes, Tektro mechanical brakes with 180 mm rotors, the LED display, controller, charger and battery, with Rad's part links and prices.

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

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This page lists the common replacement parts for the Rad Power Bikes RadRunner 1 and RadRunner 2, the single speed utility bikes with the LED display. Specs are for the stock bikes as sold; check your own bike before you buy. Full details are on the RadRunner 2 product page and in the RadRunner 2 owner's manual and RadRunner 1 owner's manual. The RadRunner Plus has gears and an LCD display, so it has its own parts page.

Photo needed: The RadRunner 2 from the side, with the battery in place. For photos, see Rad's RadRunner 2 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: 20" x 3.3". The RadRunner 2 comes with the Kenda K-Rad with a puncture-resistant liner. Rad's Kenda K-Rad 20" x 3.3" tire fits the RadRunner 1 and 2, $65, out of stock, read Nov 9, 2026. The wider Kenda Krusade 20" x 4" also fits both, $67.95, out of stock, read Nov 9, 2026.
Inner tube: Schrader valve. Rad's 20" x 4" inner tube fits both bikes, $22, read Nov 9, 2026.
Disc brake pads: the RadRunner 2 comes with Tektro P20.11 semi-metallic pads. Rad's Tektro E10.11 organic pads fit the RadRunner 1, 2, Plus and 3 Plus, $25, on back order, read Nov 9, 2026.
Brake rotor: 180 mm front and rear. Tighten the rotor bolts to 7 Nm.
Disc brake caliper: Tektro Aries MD-M300 mechanical disc on the RadRunner 2.
Brake lever: Rad's brake lever is a Tektro mechanical lever that fits all RadRunner models except the 3 Plus, $25, read Nov 9, 2026.
Freewheel: single speed, 16-tooth freewheel with a 53T crank set on the RadRunner 2.
Hub motor: 48V, 750 W rated rear hub motor.
E-bike controller: under the skid plate. The replacement is Rad's own controller, so ask Rad support for the part.
E-bike display: LED display with a button pad and a silver threaded display connector. Both bikes can take Rad's LCD display instead: Rad's LCD Display Upgrade replaces the stock LED display on the RadRunner, $99, out of stock, read Nov 9, 2026. Rad's LED display guide and LCD upgrade guide cover the swap.
Throttle: half-twist grip throttle on the right.
Pedal assist sensor: pedal cadence sensor with 4 assist levels plus zero.
Brake cutoff sensor: built into the brake levers.
E-bike charger: 48V, 2A charger. Rad's Rad Battery Charger (MY2025) fits all Rad bikes except the 2016 to 2017 RadMini 1 and the RadKick, $65, out of stock, read Nov 9, 2026.
E-bike battery: 48V, 14Ah external battery, 672 Wh. Rad's Safe Shield Advanced External Battery (15 Ah) is an upgrade for the RadRunner 1, 2 and Plus, $599, out of stock, read Nov 9, 2026. It needs Rad's updated charger.
E-bike lights: LED headlight and an integrated taillight with brake light. Rad's RadRunner headlight fits the RadRunner 1 and 2, $45, and its RadRunner taillight fits both, $27.50, both shown as shipping within 2 business days, read Nov 9, 2026.
Grips: ergonomic rubber comfort grips.
Pedals: 9/16" x 20 TPI threading, 35 Nm.

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.
If both the controller and display have failed, Area 13 E-Bikes sells an aftermarket Rad kit that replaces both together with its own 35A controller and LCD8H display, $229, shown as out of stock on Nov 9, 2026. Its LCD8H display works only with Area 13's own controller, not the stock one. It is not a Rad part, so ask Area 13 about fit, and keep the bike set up as its original class.
More independent sellers: parts suppliers. A shop can order and fit parts: find a shop.

Common repairs

Videos

RadRunner and RadRunner 2 Assembly, Rad Power Bikes from Rad Power Bikes: Rad's assembly video for the RadRunner and RadRunner 2, which shows the main 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.

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