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The Scooter Lock That Won't Slip Off

Cosari ChainVault 95

Most bike locks slide off a scooter stem or snip in seconds.

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  • No stem slip-off: cinches below the folding knuckle
  • 1-second keyless push-pin lock
  • 1200D woven sleeve keeps matte paint scratch-free
  • 680g, coils into a standard handlebar bag
Cosari ChainVault 95
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30-Day Home Trialtry it risk-free at home
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Built Around How Scooters Are Actually Shaped

Four details that fix the problems bike locks and cables cause on electric scooters.

6mm Hardened Manganese Steel

Square-edge links run end to end inside the sleeve. Pliers and pocket snips that cut through cables skate off the corners.

1-Second Keyless Push-Lock

Press the silver pin into the lock head with your thumb until it clicks. Keep your keys in your pocket until you come back.

1200D Paint-Safe Sleeve

Dense woven nylon covers the chain right up to a rubberized collar, so steel never touches your deck, stem, or spokes.

95cm Anti-Slip Reach

Wrap the lower neck twice and still reach signposts, meters, and full bike racks. No more jamming the deck against a skinny pole.

How the ChainVault 95 Keeps Your Scooter Put

Real Steel Under the Sleeve

Real Steel Under the Sleeve

Peel back the woven sleeve and you'll find 6mm square-profile hardened manganese links, not a thin braided wire. The square edges make it hard for cutter jaws to get a clean bite.

Figure-8 Cinch Below the Fold

Figure-8 Cinch Below the Fold

Wrap the chain through the lower neck and around the post. With no gap to lift through, unbolting the handlebars won't free the scooter.

Thumb-Press to Lock

Thumb-Press to Lock

Push the silver pin straight into the lock head until it clicks. Locking takes about a second, and you only need the key to open it.

Cosari ChainVault 95 hero
Excellent4.8 (247)Trustpilot

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Cosari ChainVault 95

95cm hardened steel chain lock built for scooter stems, not bike frames. Locks with a thumb press, protects your paint, and fits your handlebar bag.

Backed by our 30-Day Money-Back Trial & Full Cosari Guarantee.

$29.99 $59.99 Free Tracked Shipping (5–7 Days) Included

In Stock: Delivers in 5–7 Business Days. Free insured US delivery with tracking.

30-Day Money-Back Guarantee plus a full 2-Year Warranty.

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Description

Made for scooters, not bikes.: Scooters have no closed frame for a U-lock to grab. The flexible 95cm chain wraps the lower neck or folding knuckle and reaches poles up to about 9 inches thick alongside the stem.

Tough where it counts.: 6mm square-edge hardened manganese steel links inside a 1200D woven nylon sleeve, finished with a keyed anti-drill zinc-alloy cylinder and a silver hardened steel locking pin.

Easy to live with.: At 680g it coils into a handlebar bag or wraps the steering neck with no rattle. Lock it with a thumb press and unlock with one of the 2 included keys.

5–7 Day Shipping & 30-Day Returns

Free 5–7 Day US Shipping: Every order ships free with full tracking and delivers in 5 to 7 business days.

30-Day Trial: Try it at home for 30 days risk-free. Need help? Email us anytime at support@buycosari.com.

2-Year Warranty: If anything goes wrong within 2 years, we replace it free of charge or refund your order in full.

Why Choose the Cosari ChainVault 95?

Cosari ChainVault 95 Detail

Square-Edge Cut Resistance

Round wire gives cutter jaws an easy bite. Square hardened steel links don't, so a thief needs much more than pocket snips.

All-Weather Anti-Jam Core

We soaked the lock head in gritty saltwater and cycled it 250 times without a catch, so it should still open when you come back to a wet rack.

680g Stem-Bag Portable

Light enough that your steering stays nimble, and compact enough to coil into a standard 3L handlebar bag.

Cosari ChainVault 95 vs. Ordinary Alternatives

Cosari ChainVault 95Standard Competitors

FeatureCosari ChainVault 95Standard Competitors
Secures a scooter with no closed frameYes, wraps below the folding jointU-locks can lift off the stem
Reaches wide signposts and meters95cm reachCuffs and mini U-locks fall short
Resists pliers and pocket snips6mm square hardened steelCables cut in about 4 seconds
Locks without a key1-second thumb push-pinKey or dial needed every time
Protects matte paintFull 1200D sleeve and rubber collarBare metal rattles and scuffs
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What's Included

In the Box
  • 1 × Cosari ChainVault 95 Chain Lock (95cm, 6mm hardened steel)
  • 1 × Pre-Fitted 1200D Woven Nylon Sleeve (already on the chain)
  • 1 × Set of 2 Precision-Milled Metal Keys
Technical Specifications
  • Usable length: 95 cm (37.4 in)
  • Chain: 6 mm square-edge hardened manganese steel links
  • Sleeve: 1200D woven ballistic nylon
  • Lock head: Keyed anti-drill zinc-alloy cylinder with rubberized collar
  • Locking: Push-pin, keyless to lock, key to unlock
  • Weight: 680 g (1.5 lbs)
  • Coiled size: Approx. 5.5 in (14 cm) loop
  • Keys included: 2 precision-milled metal keys
Care & Safety
  • After riding in rain or slush, wipe the lock head dry and push the pin in and out a few times so grit doesn't settle in the mechanism.
  • Every couple of months, add a single drop of dry graphite lubricant to the keyway. Skip oil-based sprays, since they attract dirt. Let a wet sleeve air-dry fully before storing it coiled.
  • Backed by our 30-Day Money-Back Guarantee & Full Cosari Warranty
  • Customer Support: support@buycosari.com
In the Box Cosari ChainVault 95

Lock Up in 3 Steps

Swipe left for steps 2 and 3

  1. Thread & Loop
    1

    Thread & Loop

    Pull the chain from your handlebar bag and thread it through the scooter's lower neck, then around a post or bike rack.

  2. Push the Pin to Click
    2

    Push the Pin to Click

    Press the silver pin into the lock head with your thumb until it clicks. Your keys stay in your pocket.

  3. Walk Away Worry-Free
    3

    Walk Away Worry-Free

    Check that the chain is snug with no slack on the ground, then head inside and get on with your errand.

Verified Customer Reviews

What 200+ Verified Buyers Say About the Cosari ChainVault 95

Excellent Trustpilot
4.8
Based on 247 verified reviews
5 Stars
212
4 Stars
25
3 Stars
7
2 Stars
2
1 Star
1
97% of buyers recommend the Cosari ChainVault 95
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✓ Verified Purchase
Alex M.1 week ago

No more hex-key stem trick

PSA: Stop putting regular bike U-locks on straight scooter stems! A thief unscrewed my buddy's 4 handlebar bolts with a hex key in 30 seconds and lifted the whole stem out of a U-lock. Because the ChainVault 95 is a flexible square-link chain in a tough woven sleeve, I can figure-8 wrap it right around the lower diagonal folding neck where there's zero gap for a stem slip or pry bar. Easily worth it.

Verified Purchase · Austin, TX · Cosari ChainVault 95

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Alex M.1 week ago

Fits inside my 3L handlebar pouch

95cm is the exact sweet spot. It coils up into my 3L EVA handlebar bag without throwing off my steering balance, yet reaches around fat city signpost poles when all the bike racks are taken. The push-pin lock head is clutch when your hands are freezing or holding coffee—just loop it around the neck, press the silver pin in until it clicks, and walk away.

Verified Purchase · Austin, TX · Cosari ChainVault 95

✓ Verified Purchase
Alex M.1 week ago

Zero rattle and saved my matte black paint

My old U-lock rattled like a cowbell on every crack in the pavement and chewed all the matte black paint off my NIU stem inside a week. Love that the heavy nylon fabric sleeve on this goes all the way up to the matte rubberized lock collar so bare metal never touches my wheel spokes or deck paint.

Verified Purchase · Austin, TX · Cosari ChainVault 95

✓ Verified Purchase
Alex M.1 week ago

Finally can run into CVS without getting yelled at

Got yelled at by the security guard at CVS last week for rolling my folded scooter down the aisle. Realized my $800 commuter is useless for quick errands if I can't lock it outside for 15 minutes. Used to stare nervously out the cafe window every 15 seconds with a cable lock; now I actually sit back down and finish my lunch.

Verified Purchase · Austin, TX · Cosari ChainVault 95

✓ Verified Purchase
Alex M.1 week ago

Way better reach than handcuff locks

Those handcuff-style scooter locks looked genius online until I got downtown and realized a 3-inch link means you have to practically weld your scooter deck onto a skinny pole. This 95cm chain gives you enough slack to lock to real racks, parking meters, or thick square posts without scratching your fenders.

Verified Purchase · Austin, TX · Cosari ChainVault 95

✓ Verified Purchase
Alex M.1 week ago

Solid weight, smooth key cylinder

Had a cheap lock jam shut outside the gym at 8pm in the rain last month, so cylinder quality was my main concern. The key turns smoothly with zero sticking and the dust cover keeps road grit out. Giving 4 stars only because you definitely feel the real steel weight in your backpack, though I wouldn't trust anything lighter.

Verified Purchase · Austin, TX · Cosari ChainVault 95

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Alex M.1 week ago

Cable locks are gift ribbons compared to this

Someone snipped my braided cable lock outside Whole Foods in broad daylight while I grabbed two items. Upgraded to the ChainVault 95 and you can feel the hardened square steel links inside the sleeve. Diagonal cutters won't touch this thing.

Verified Purchase · Austin, TX · Cosari ChainVault 95

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Alex M.1 week ago

Click-to-lock without the key is so fast

I use my Segway Ninebot to commute to campus every day. Not having to fumble for my keys just to lock up before lecture is huge. You just push the silver pin into the black cylinder and it clicks shut solidly. Takes literally five seconds.

Verified Purchase · Austin, TX · Cosari ChainVault 95

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Alex M.1 week ago

Loops through my spoked rear wheel too

If you have a scooter with a larger spoked wheel or suspension arms, the fabric-covered chain slides right through without scraping the rim or brake rotor. Much more versatile than rigid folding plates.

Verified Purchase · Austin, TX · Cosari ChainVault 95

✓ Verified Purchase
Alex M.1 week ago

Heavy duty sleeve holds up to concrete

Been dragging this through wet bike racks and rough concrete curbs for a month and the woven black sleeve hasn't frayed at all. It's a little snug fitting into a small 2L front pouch, so a 3L bag or wrapping it around the stem while riding works best.

Verified Purchase · Austin, TX · Cosari ChainVault 95

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Frequently Asked Questions

Will the ChainVault 95 stop my scooter from being stolen?

It's built to stop the common opportunistic thefts we see in cities: pocket wire snips, pliers, and quick stem-lift tricks during 15 to 90 minute daytime stops. No portable lock will stop a determined thief with an angle grinder overnight, so bring your scooter inside at night.

Will it fit my scooter?

In our tests it fit the Ninebot Max, NIU KQi3, Hiboy S2, Xiaomi, and Apollo City. The flexible chain wraps around the lower neck or below the folding knuckle, which works on almost any stand-up scooter. If it doesn't fit yours, the 30-day money-back guarantee covers you.

Do I need the key to lock it?

No. Press the silver pin into the lock head until it clicks. You only need the key to unlock it.

Will it scratch my scooter?

The chain is fully covered by a 1200D woven nylon sleeve that runs up to a rubberized collar on the lock head. After 50 simulated pothole miles against a matte black stem, we found no scuffs.

How heavy is it, and where do I carry it?

It weighs 680g (1.5 lbs). It coils into a loop about 5.5 inches across that fits a standard 3L handlebar bag or backpack pocket, or you can wrap it around the steering neck while you ride.

What if I lose a key?

It ships with 2 precision-milled metal keys. Keep one at home in a drawer as your spare.

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