Security: a lock (and a battery habit)
A 90 lb trike is awkward to steal but not impossible to roll away — and its $200–300 battery slides out in seconds. The right setup is a mid-weight lock through the frame plus the habit of taking the battery (or its key) with you.
Rockbros Mini Folding Lock with mount$34
Folding links reach around trike frame tubes that U-locks can't; the mount keeps it on the trike instead of in a drawer.
Longer reach for racks and posts; heavier to carry.
Worth knowing: No lock stops a determined thief with tools — the goal is being harder to take than the next bike on the rack. Register the serial number the day it arrives.
Visibility: mirror first, then lights
Trikes are wider than bikes and slower than traffic, and you can't shoulder-check as easily from a backrest seat. A mirror is the single highest-value accessory on this page — genuinely more important on three wheels than on two.
Rockbros 360° Rear View Mirror$16
Rotatable and cheap enough to buy two — one per bar end is the trike setup that removes blind spots on both sides.
Rockbros Q1 Ultra Tail Light (IPX6)$29
Supplements the trike's built-in brake light with daytime-visible flash modes; USB-charged, weatherproof.
Worth knowing: Check what your trike already has before buying lights — every Mooncool ships with turn signals and a brake light, and the Lectric Trike2 has an integrated brake-activated rear light. The add-on case is daytime running flash, which built-ins mostly lack.
Cargo: bags that fit the rack you already have
The rear basket handles groceries; the gap is weatherproof, lockable, take-it-with-you storage. Standard rack bags fit trike racks (Lectric's rack is 12" long and takes their large basket; Mooncool's rack bosses are standard).
Rockbros 20L Roll-Top Rack Bag (waterproof)$70
Roll-top keeps rain out completely; 20L swallows a helmet, charger, and a grocery run's fragile layer.
Rockbros 3-in-1 Pannier / Backpack$54
Clips off and becomes a backpack at the destination — the errand-runner's pick.
Mooncool Trike Cargo Trailer$250
For loads beyond basket scale. Remember it counts against total load capacity, and check your trike's hitch compatibility (Mooncool-fit).
Comfort: the backrest seat and the phone perch
Upright trike posture puts weight on the saddle differently than a bike — the wide-saddle-with-backrest upgrade is the one riders mention most, and a phone mount turns the handlebar into a dashboard for navigation.
Mooncool Adjustable Wide Seat with Backrest$70
Purpose-built for Mooncool trikes; bundled free with some models — check what yours ships with before buying.
Rockbros Anti-Overload Phone Holder (4.7–7.2")$27
Full-wrap grip rated for rougher surfaces — the failure mode of cheap mounts is a launched phone on the first pothole.
Protection: a cover if it lives outside
Most trikes end up parked outside or in an open carport — they're too big for many hallways. UV and rain age the display, saddle, and wiring long before the motor wears out. $35–40 of cover is the cheapest insurance on this page.
Mooncool Protective Trike Cover$40
Cut for trike geometry (wide rear axle) — regular bike covers don't close around three wheels.
Rockbros High-Elastic Cover$35
Sized for 26–29" bikes; on a compact 20" trike it works as a stretch fit, but the Mooncool cut fits trikes better.
Your head
Trikes don't fall over at a stop, but you're sharing roads at 15+ mph — and several states' helmet rules (see the laws tool below) apply to e-trikes regardless of wheel count.
Rockbros LK-79 Lightweight Helmet$70
Light matters more than features — a helmet you notice is a helmet that stays home.
What we're not covering yet (on purpose)
- Canopies and sunshades — there's a lot of interest in these, and we've yet to find a merchant selling one we'd trust: the universal-fit canopies on marketplaces vary wildly in build quality. That page comes when we can recommend something we'd actually bolt on.
- Dog carriers and pet trailers — big enough (and specific enough) to deserve a dedicated guide; Mooncool's purpose-built rear and front pet carriers ($90/$70) are the fit-guaranteed starting point for Mooncool owners.
- Spare batteries — the biggest-ticket accessory; covered per-model in the Mooncool review since fitment is model-specific.
Before you buy any of it
Check the built-ins first (lights and seats are increasingly bundled), keep receipts against total-load math if you're near your trike's capacity (the capacity guide explains why), and check your state's helmet rule in the laws lookup. Still choosing the trike itself? Start at the Fit Finder.