Accessories

The gear you actually need

An e-bike without a helmet, a lock and lights is only half bought. These four are what you need from day one, and we picked them by how many buyers stand behind them, not by brand name.

🪖 Helmet

Zacro adult bike helmet, CPSC certified, 54-63 cm

$24.99price as of 2026-08-21

4,6(3.259)

The one thing you should never buy on price alone, and this one is CPSC certified — the US standard — with 3,259 reviews at 4.6 stars behind it. At $25, there's no reason to ride without one.

Certification: CPSC approved (US standard) and CE marked
Weight: 260 g
Ventilation: 18 vents
Fit: 54-63 cm, dial adjuster
Extras: Removable visor and washable pads
Warranty: 12 months

The good

CPSC certified: it meets the US safety standard, not just a marketing claim
3,259 reviews at 4.6 stars
260 g and 18 vents — you'll notice both in summer
Dial adjuster you can tighten one-handed while riding
Removable visor and washable liner

The not so good

Amazon's own spec table lists the age range as 'child', which contradicts the title — it's an adult helmet
One size band: at 54-63 cm it won't suit very small or very large heads
12-month warranty
No MIPS: if you want rotational impact protection, budget three times as much

Buyers keep coming back to two things: how light it is and how well it breathes. A rider in Florida singles out the ventilation. Several mention the fit holds without readjusting mid-ride.

View on Amazon

🔒 Lock

Kryptonite KryptoLok U-lock with 4 ft cable

$63.90~~$79.95~~-20 %price as of 2026-08-21

4,6(6.006)

Kryptonite is the name in bike security in the US, and this is their standard workhorse. The double-bolted shackle resists twisting and prying, the cable covers your front wheel, and there's a limited lifetime warranty. It's $16 off.

Shackle: 1/2 inch hardened steel, double-bolted
Inside dimensions: 4 × 9 inches
Included: 4 ft double-loop cable, FlexFrame-U mount and 2 keys
Weight: 2.91 lb
Warranty: Limited lifetime

The good

6,006 reviews at 4.6 stars, from the most recognized name in bike locks
Double-bolted 1/2 inch hardened shackle: resists twisting and prying
Comes with a 4 ft cable for the front wheel, helmet or accessories
Frame mount included, so you're not carrying it in a backpack
Limited lifetime warranty
$16 below list

The not so good

$64 is real money next to a $20 cable lock — but so is a stolen e-bike
2.91 lb to carry around
The 4 × 9 inch shackle is tight around thick posts: check what you'll be locking to
The included cable deters, it doesn't secure: it's for the wheel, not the frame

6,006 reviews at 4.6 stars. The recurring theme is peace of mind: buyers describe it as smooth to operate and dense enough that they stop worrying about the bike. Reviewers who compare it with cheaper locks consistently say the difference in feel is obvious.

View on Amazon

💡 Lights

Ascher USB rechargeable front and rear light set

$16.99price as of 2026-08-21

4,4(32.673)

32,673 reviews — by far the biggest sample of anything in this list, and still 4.4 stars. For $17 you get front and rear, both rechargeable, both mounted with a rubber strap in seconds.

Output: 300 lumens
Modes: 4 on each light
Batteries: 2,000 mAh front, rechargeable rear, both USB
Water resistance: IPX4
Mounting: Silicone strap, no tools
Included: Front headlight and rear taillight

The good

32,673 reviews at 4.4 stars: an enormous, honest sample
Front and rear in one box, both USB rechargeable
Silicone strap mount: on and off in seconds, no tools
4 modes on each light, including a low mode that lasts much longer
$17 for the pair

The not so good

300 lumens is enough to be seen and to light a lit street — not enough for an unlit trail
IPX4 only: fine in rain, not for a pressure wash
On the brightest mode the battery drains far faster than on flashing
Strap mounting means remembering to take them off when you park on the street

With 32,673 reviews the pattern is unambiguous: bright enough, and the strap mount is what people love most — no tools, no brackets. Reviewers who ride at night note that the low and flashing modes last for weeks between charges. The most common complaint is wanting more output for unlit paths.

View on Amazon

🎒 Rack bag

MOSISO 12 L waterproof rear rack bag with shoulder strap

$25.64~~$26.99~~-5 %price as of 2026-08-21

4,6(1.920)

If your bike has a rear rack, this turns a grocery run into an ordinary ride. 12 waterproof litres for $26, with a shoulder strap so you can take it with you when you lock up.

Capacity: 12 litres in the main compartment, plus two side pockets
Dimensions: 15.1 × 6.4 × 6.4 inches
Material: Waterproof polyester
Mounting: Four hook-and-loop straps to the rear rack
Carrying: Adjustable shoulder strap, 36 to 60 inches, plus a top handle

The good

1,920 reviews at 4.6 stars
Genuinely waterproof — reviewers report riding through storms with nothing getting in
Four straps: reviewers say it doesn't shift even on rough ground
Shoulder strap and top handle for carrying it off the bike
Two side pockets on top of the 12 L main compartment

The not so good

You need a rear rack: it's useless without one
12 litres is a commute, not a tour — for touring you want proper panniers
Hook-and-loop straps are fast but wear out sooner than a clip system

1,920 reviews at 4.6 stars. Two things come up again and again: it really is waterproof — one buyer got caught in a storm and nothing got in — and the straps hold it dead still on the rack. Several say the build quality feels like twice the price.

View on Amazon

Affiliate links: if you buy through them we earn a commission from Amazon at no extra cost to you. Learn more.