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Best Chain Locks for Adult Tricycles
A trike is wide and heavy, so a chain that reaches a rack and a frame tube matters more than a flashy brand.
Updated · 3 min read · 4 products evaluated
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A trike does not fit a standard U-lock. The frame is wide, the wheels are far apart, and a rack or post may sit several feet from where you can park. A chain gives the reach that a rigid shackle lacks, and a longer chain lets you loop the frame and a wheel together.
No lock makes a trike theft-proof, and none of these has a long record behind it. Use the length wisely, lock to something fixed, and add an alarm from /accessories/best-bike-alarms-for-adult-tricycles/. For wider habits, read /adult-tricycle-locking-and-theft-prevention/.
Short answer
The Kryptonite Keeper 785 is the best overall for its 7mm hardened links and nylon sleeve, though at 33.5 inches it needs careful routing. The NDakter U-lock plus 120cm chain gives the most reach, the Weogine pairs a 14mm U-lock with a 4ft chain, and the APECYC is the keyless 4ft option.
Quick Picks
Our 4 recommendations at a glance. Tap a pick for the full verdict.
Best Two-Lock Combo
Weogine U-Lock with 4ft Chain
Riders wanting a U-lock plus reach
Quick Answers by Need
Best Bike Chain Locks with Protective Covers
Kryptonite Keeper 785 Chain Lock
The Kryptonite Keeper 785 wears a nylon sleeve over 7mm hardened links, which stops the chain scratching your frame. Check the sleeve covers the full length you wrap around the trike. The APECYC also has a fabric cover if you prefer a combination.
Best Chain Locks for Electric Tricycles
NDakter U-Lock and 120cm Chain Set
The NDakter set offers 120cm of chain plus an 18mm U-lock, which helps reach around a wide e-trike frame and a post. It weighs 4.4 lb, so check you can carry it or mount it. Lock the frame and the motor side where possible.
Best Combination Bike Chain Locks
APECYC 4FT Combination Chain Lock
The APECYC is the combination pick, with a 5-digit code and hardened steel links under a fabric cover. Choose a code you can remember but others will not guess. It suits riders who lose keys.
Best Heavy Duty Bike Chain Locks
Kryptonite Keeper 785 Chain Lock
The Kryptonite Keeper 785 uses 7mm hardened links with a disc cylinder, the thickest chain in this group. Check the length reaches your trike and a fixed post. For a second lock layer, see the NDakter set.
Best Lightweight Bike Chain Locks
None of these chain locks is sold as lightweight, and the NDakter set is the heaviest at 4.4 lb. If weight matters, check the weight of the Kryptonite and APECYC before ordering. A lighter lock is a trade for reach and link thickness, so keep it for short stops.
Our Picks
Best Overall1 of 4
Kryptonite Keeper 785 Chain Lock
Seven-millimeter hardened links, a disc-style cylinder and a protective sleeve.
Best for
Riders who value link strength
Why we like it
The Keeper 785 uses 7mm hardened steel links with four-sided shaping, a disc-style cylinder aimed at resisting picking and drilling, and a nylon sleeve to protect the frame. It extends to about 85 cm, or 33.5 inches, in circumference.
That reach is short for a wide trike, so it is best for locking a rear wheel and frame to a post you can pull right up to. The NDakter and APECYC give more length. Best for the strongest links here; measure your frame before ordering.
Key specs
| Features | 7mm hardened links, disc cylinder, nylon sleeve, 85 cm reach |
|---|
Specs can change between model years; confirm the exact version before buying.
Strengths
- 7mm hardened links
- Disc-style cylinder
- Protective nylon sleeve
- Key replacement program
Limitations
- Short for a wide trike
- Heavy to carry
Consider it if
- Locking frame and wheel together
- Home and work racks
Skip it if
- Long reach to distant posts
Best Reach2 of 4
NDakter U-Lock and 120cm Chain Set
An 18mm U-lock plus a 6mm by 120cm chain with a nylon cover and three keys.
Best for
Wide frames and distant posts
Why we like it
This set pairs an 18mm shackle U-lock with a 6mm by 120cm chain, three keys and a nylon cover on the chain. The total weight is about 4.4 pounds.
The 120cm chain gives the most reach here, which suits a trike whose wheels sit far from the nearest post. The links are thinner than the Kryptonite's 7mm, so it trades strength for length. Best for riders who need reach; it is heavy to carry.
Key specs
| Features | 18mm U-lock, 6mm chain, 120cm length, 4.4 lb, 3 keys |
|---|
Specs can change between model years; confirm the exact version before buying.
Strengths
- 120cm reach
- Includes U-lock and chain
- Nylon cover protects paint
- Three keys
Limitations
- Thinner 6mm chain
- Heavy at 4.4 lb
Consider it if
- Wide trikes
- Distant posts
Skip it if
- Riders wanting the lightest lock
Best Two-Lock Combo3 of 4
Weogine U-Lock with 4ft Chain
A 14mm shackle U-lock with a 4ft chain and a mounting bracket.
Best for
Riders wanting a U-lock plus reach
Why we like it
The Weogine combines a 14mm U-lock with a 4ft steel chain, three keys and a mounting bracket. The U-lock measures about 6.33 by 6.25 inches. You can use the U-lock alone or add the chain for more reach.
It is lighter than the NDakter and shorter in reach, with a thinner shackle. It suits a trike where you can lock the frame with the U-lock and the wheel with the chain. Best for flexible use; the lock is an unverified brand.
Key specs
| Fit and mounting | Frame mounting bracket |
|---|---|
| Features | 14mm shackle, 4ft chain, 3 keys |
Specs can change between model years; confirm the exact version before buying.
Strengths
- U-lock plus chain
- Mounting bracket included
- Three keys
- Can use separately
Limitations
- Thinner shackle than the NDakter
- Unverified brand
Consider it if
- Two-point locking
Skip it if
- Very long reach
Best Keyless4 of 4
APECYC 4FT Combination Chain Lock
A 5-digit resettable combination on a hardened steel 4ft chain.
Best for
Riders who lose keys
Why we like it
The APECYC has hardened steel links, a reinforced lock core and a 5-digit resettable code, with up to 100,000 possible combinations. A fabric cover protects the frame and makes it easier to carry.
A 4ft chain gives more reach than the Kryptonite, but a combination can be guessed or observed more easily than a keyed disc cylinder. Best for riders who do not want to carry keys; shield the dial when you set the code.
Key specs
| Features | 4ft chain, 5-digit combination, hardened steel links, fabric cover |
|---|
Specs can change between model years; confirm the exact version before buying.
Strengths
- 4ft reach
- No key to lose
- Resettable code
- Protective fabric cover
Limitations
- Combination can be watched
- Link size not clearly stated
Consider it if
- Keyless convenience
Skip it if
- High-theft street parking
Spec Comparison
Key figures side by side. A dash means the brand gives no figure, so ask before you buy if it matters to you.
| Model | Features | Link |
|---|---|---|
| Kryptonite Keeper 785 Chain Lock Best Overall | 7mm hardened links, disc cylinder, nylon sleeve, 85 cm reach | Check price |
| NDakter U-Lock and 120cm Chain Set Best Reach | 18mm U-lock, 6mm chain, 120cm length, 4.4 lb, 3 keys | Check price |
| Weogine U-Lock with 4ft Chain Best Two-Lock Combo | 14mm shackle, 4ft chain, 3 keys | Check price |
| APECYC 4FT Combination Chain Lock Best Keyless | 4ft chain, 5-digit combination, hardened steel links, fabric cover | Check price |
How We Chose These Chain Locks for Trikes
- Reach on a wide frame
- We compared chain length, since a trike is wider than a bike and often needs a chain that wraps the frame, a wheel and a distant fixed post in one pass.
- Link strength
- We weighed link thickness and hardened steel against carrying weight, because thicker links resist cutters better but a heavy chain is awkward to carry on a trike.
- Key or combination
- Keys can be lost and combinations can be watched, so we noted the trade-off for each pick and what a rider gives up by choosing one over the other.
- Honest limits
- Every chain can be cut with the right tools, so none of these stops a determined thief. We judged how much delay each lock adds and how easy it is to use daily.
What to Look for in a Chain Lock
Link thickness
Thicker links need bigger, heavier cutters and more time to defeat, but they add weight that you carry on every ride. A 7mm hardened link, like the Kryptonite Keeper 785 uses, is far harder to cut than a thin cable.
Look for a stated link thickness and treat a chain with no figure with caution. Then weigh the lock in your hand, because a chain you leave at home protects nothing.
Length for a wide trike
A trike frame is wide, so you may need to loop a frame tube, a wheel and a fixed post together. A chain shorter than about three feet can run out of reach before it closes around everything you want locked.
Measure from the frame to the post or rack you use most and add slack. The Kryptonite reaches 33.5 inches, the APECYC and Weogine 4 feet, and the NDakter 120cm.
Key or combination
A key cylinder is harder to pick than a short code, but keys can be lost, and a spare is easy to forget. A combination avoids keys but can be watched or guessed if it is short.
Choose a key cylinder for high-risk spots such as public racks, and a resettable code for low-risk spots such as a garage. Store spare keys away from the trike.
Frame protection
A bare steel chain scratches paint, wears cables and rubs the finish off a basket frame over time. A sleeve or fabric cover keeps the chain from chewing the metal it wraps around.
Check that a nylon sleeve or fabric cover is included, and slide it so it sits over the part that touches the frame each time you lock up.
How to Choose
By Parking Place
| Situation | Our pick | Why |
|---|---|---|
| Strongest links, post nearby | Kryptonite Keeper 785 Chain Lock | 7mm hardened links with a disc style cylinder |
| Posts far from the trike | NDakter U-Lock and 120cm Chain Set | 120cm chain reaches distant posts and racks |
| Two-point locking in public | Weogine U-Lock with 4ft Chain | U-lock plus a 4ft chain, usable separately |
| No keys to carry or lose | APECYC 4FT Combination Chain Lock | Resettable 5-digit code on a 4ft chain |
Strength vs Reach
- Strength
- The Kryptonite Keeper 785 has the thickest links here, at 7mm, plus a disc style cylinder, but its 33.5 inch reach is short for a wide trike.
- Reach
- The NDakter set has a 120cm chain and an 18mm U-lock, so it wraps a wide frame easily, though its 6mm chain is thinner and the set weighs 4.4 lb.
Most trike owners should favor reach, since a lock that cannot wrap around anything solid does nothing.
For Overnight Parking Specifically
- Look for
- A chain that wraps a frame tube and a fixed post with some slack, a key cylinder rather than a short code, and a sleeve that protects the paint.
- In this comparison
- The Kryptonite Keeper 785 pairs 7mm links with a disc style cylinder and a nylon sleeve, and the NDakter adds an 18mm U-lock to a 120cm chain with three keys.
When to Spend More
- Spend more if
- You park in public places. The Kryptonite's 7mm links or the NDakter's U-lock plus chain give a thief two different tools to defeat instead of one.
- Save if
- You lock inside a garage or shed, where the APECYC's 4ft hardened steel chain and resettable code are enough for a casual deterrent.
Frequently Asked Questions
Is a chain better than a U-lock?
A chain gives more reach on a wide trike, while a U-lock with a thick shackle is harder to cut in a small space. The NDakter and Weogine sets combine both, so you can use whichever fits the post.
What length do I need?
Enough to loop a frame tube and a fixed post with some slack. For a wide trike, aim for about four feet, as the APECYC and Weogine offer, or the 120cm NDakter, rather than the Kryptonite's 33.5 inches.
Do locks stop theft?
No, they slow it down. Every chain can be cut with the right tools, so use the lock to make your trike a harder target than the next one, and park in a lit, busy spot when you can.
Where should the lock sit?
Keep it off the ground so it cannot be hit against the pavement, and keep the keyway pointing down so rain and grit drain out. Pull the chain tight so there is little slack to leverage.
Are cable locks acceptable?
Thin cables are cut quickly, so hardened steel chains are the better choice. Even a short, thin chain is a better delay than a cable of the same weight.
What if I lose the key?
The Kryptonite Keeper 785 comes with a key replacement program, and the NDakter and Weogine each include three keys. The APECYC avoids the problem with a resettable 5-digit code, though anyone who watches you enter it can learn it.
Bottom Line
Choose the Kryptonite Keeper 785 for link strength, the NDakter U-Lock and chain set if you need reach on a wide trike, and the APECYC if you would rather not carry keys. Always lock to something fixed, and treat any chain as a delay, not a guarantee.