Himiway Big Dog: parts and specs
Replacement parts and specs for the Himiway Big Dog cargo bike: Kenda 20 x 4 tires, 180 mm mechanical disc brakes, Shimano 7-speed, 750 W geared hub, 48V 20Ah battery, with Himiway's tire, tube, pad, controller, display and charger pages.
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This page lists the common replacement parts for the Himiway Big Dog, the 20" cargo bike sold from 2022 to 2024. Specs are for the stock bike as sold, read Nov 9, 2026; check your own bike before you buy. Full specs are in Himiway's Big Dog review article. Some Big Dog parts differ by frame number, so find yours on the frame before ordering.
Photo needed: The Big Dog from the side, showing the 20 x 4 tires and long rear rack. For photos, see Himiway's article 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" fat tire. Himiway's tire page has a Big Dog 20 x 4.0" option at $119, marked sold out or unavailable, read Nov 9, 2026.
- Inner tube: Himiway's inner tube page has a 20 x 4.0" tube for the Big Dog, $29 for a front and rear pair, marked sold out or unavailable, read Nov 9, 2026. The tubes take 5 to 30 psi.
- Disc brake pads: Himiway's brake pads page has a "Big Dog; Rambler (Premium)" option at $20, marked sold out or unavailable, read Nov 9, 2026.
- Disc brake caliper: 180 mm mechanical disc brakes.
- Freewheel: Shimano 7-speed.
- Hub motor: 750 W brushless geared hub. Himiway's motor page has two Big Dog options by gear type at $259.99, sold out, read Nov 9, 2026; ask Himiway support which fits your bike.
- E-bike controller: Himiway's controller page has a Big Dog option at $139.99, marked sold out or unavailable, read Nov 9, 2026.
- E-bike display: LCD with USB charging. Himiway's display page has a Big Dog option at $99, marked sold out or unavailable. The Upgrade Smart LCD Display is $109, in stock, read Nov 9, 2026, and fits the Big Dog except frame numbers starting with 185, FLE or FLF.
- E-bike charger: Himiway's charger page has a Big Dog option, 48V, at $95.90, marked sold out or unavailable, read Nov 9, 2026.
- E-bike battery: 48V, 20Ah lithium. Himiway's Extra Battery Pack has a Big Dog 48V 20Ah option at $589, sold out, read Nov 9, 2026.
Tools for common jobs
- Tire levers: getting the 4" tire off the rim.
- Floor pump with gauge: filling within the 5 to 30 psi range of Himiway's tubes and the sidewall range.
- Tire pressure gauge: checking low fat tire pressure accurately.
- Axle nut wrench: removing the rear hub motor wheel; the nut size isn't listed.
- Hex keys: stem, seat clamp, rack and caliper bolts.
- Torque wrench: axle, stem and rack bolts to the values in your manual.
- Cable cutters: trimming brake and shifter cables on the mechanical disc brakes.
- Chain checker: measuring chain wear.
- Chain tool: fitting a new 7-speed chain.
- Chain lube: regular chain care.
- Bike repair stand: the Big Dog weighs 79 lb, so use a heavy duty stand or work on the ground.
Where to buy
- Himiway's tire, inner tube, brake pads, controller, display and charger pages, each with a Big Dog option. Most options were sold out or unavailable on Nov 9, 2026, so check back or ask Himiway support.
- Himiway's Extra Battery Pack and motor page, every option sold out on Nov 9, 2026.
- Himiway support for parts not sold in its store. Have your frame number ready, since some Himiway parts differ by frame number.
- Independent sellers: parts suppliers.
- A shop can order and fit parts: find a shop.
Common repairs
- Himiway troubleshooting
- Adjust mechanical disc brakes and replace disc brake pads
- Fix a flat on a rear hub motor wheel and set tire pressure
Sources
- Big Dog review article, himiwaybike.com
- tire page, himiwaybike.com
- inner tube page, himiwaybike.com
- brake pads page, himiwaybike.com
- controller page, himiwaybike.com
- display page, himiwaybike.com
- Upgrade Smart LCD Display, himiwaybike.com
- charger page, himiwaybike.com
- Extra Battery Pack, himiwaybike.com
- motor page, himiwaybike.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.
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