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Rad Power Bikes RadWagon 5: parts and specs

Replacement parts and specs for the RadWagon 5 cargo bike: Kenda 20 x 3.3 tires, 20 x 4 Schrader tubes, Tektro HD-E395 hydraulic brakes with E11.11 pads and 180 mm rotors, external battery and charger, with Rad's links and prices.

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.

This page lists the common replacement parts for the Rad Power Bikes RadWagon 5 cargo bike, sold from 2024. Specs are for the stock bike as sold; check your own bike before you buy. Full details are on the RadWagon 5 product page. Some parts may differ from the listed specs, so check the markings on your own parts.

Photo needed: The RadWagon 5 from the side, showing the 20 inch wheels and the long rear deck.. 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 3.3". Rad's RadWagon 5 Tire 20" x 3.3", a Rad and Kenda custom tire (84-406), fits the RadWagon 5 and the 2025 RadRunner and RadRunner Plus, $65, out of stock, read Nov 9, 2026.
  • Inner tube: Rad's 20" x 4" inner tube fits 20 inch tires 3.3 to 4 inches wide, including the RadWagon 5 (2024 to 2025). Schrader valve, 5 to 30 PSI, $22, shown as shipping within 2 business days, read Nov 9, 2026.
  • Disc brake pads: Tektro E11.11 as stock. Rad's Tektro E11.11 pads fit only the RadWagon 5, $25 per set for one wheel, shown with an add to cart button, read Nov 9, 2026. The pad back is marked Tektro E11.11. Keep the spring from your old pads.
  • Brake rotor: 180 mm x 2.3 mm. Rad's Tektro TR180-17 rotor, 180 mm x 2.3 mm with mounting hardware, fits the RadWagon 5. No price showed, read Nov 9, 2026.
  • Disc brake caliper: Tektro HD-E395 hydraulic disc brakes.
  • Freewheel: 7-speed, 11 to 34 tooth.
  • Hub motor: rear hub, 750W rated, 90 Nm.
  • E-bike display: Rad custom color display.
  • Throttle: half twist grip throttle.
  • E-bike charger: 48V DC, 2 A. 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: 15 Ah, 720 Wh Safe Shield Advanced external battery, UL 2271. Rad's Safe Shield Advanced External Battery is standard on the RadWagon 5, $599, out of stock, read Nov 9, 2026. Use only the updated 2025 Rad charger with it.
  • E-bike lights: auto-on LED headlight and integrated taillight with brake light and turn signals. Rad's RadWagon 5 headlight, $55, and RadWagon 5 taillight, $38.50, fit the RadWagon 5, both on back order, read Nov 9, 2026.
  • Grips: ergonomic rubber comfort grips.
  • Pedals: composite platform, 9/16" x 20 TPI threading.
  • Saddle: padded flat touring saddle.

Tools for common jobs

  • Hex keys: brake caliper and lever bolts, rack and deck hardware checks.
  • Tire levers: changing the 20 x 3.3 tire or tube.
  • Floor pump with gauge: the 20 x 4 tube is rated 5 to 30 PSI, so pump to the range on your tire sidewall.
  • Axle nut wrench: removing the rear hub motor wheel to fix a flat.
  • Torque wrench: tightening axle nuts and brake bolts to your manual's values, which matters on a loaded cargo bike.
  • Brake pad spreader: resetting the Tektro hydraulic pistons before fitting new pads.
  • Brake bleed kit: bleeding the Tektro HD-E395 brakes. Tektro hydraulic brakes use mineral oil, see mineral brake oil.
  • Pedal wrench: swapping the 9/16 inch pedals.
  • Chain checker: checking chain wear, which comes faster with heavy loads.
  • Chain lube: regular chain care on the 7-speed drivetrain.

Where to buy

  • Rad's spare parts store: tires, tubes and brakes. Much was out of stock on Nov 9, 2026. For a controller, motor or display, ask Rad support.
  • Independent sellers: our parts suppliers page. A local shop can order and fit parts: 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.

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