Seatylock Review 2026: Folding, U and Chain Bike Locks Rated by Sold Secure
You lean your bike against a rack, pat your pockets and realize your lock is still at home on the hallway floor. Or it's in your bag, rattling and heavy, scratching your frame on the way. Bike locks are easy to resent, which is exactly the problem Seatylock says it set out to solve: locks secure enough for city parking that are also pleasant to carry.
We went through Seatylock's lineup, security ratings, prices, warranty and policies in October 2026 to show what each lock offers and how to buy one without overpaying.
The Story: A Lock Company That Started With a Saddle
According to its "Who We Are" page, Seatylock was founded in 2008 with the goal of "setting new standards in the bike protection industry." Its first namesake product was unusual: a bike saddle that comes off the seat post and turns into a lock. Since then the company has built a full range of folding locks, U-locks and chain locks.
The brand says it designs, produces and assembles its products in-house, including cylinders and keys, at a privately owned facility in China. It holds US, European and other patents (listed on its Patents page), and says its designs have won iF Design and Red Dot awards.
Security Ratings: How to Read Them
- Sold Secure (UK): Seatylock says its locks, except the standard Seatylock saddle model, are certified by Sold Secure, a testing body run by the Master Locksmiths Association, at Silver, Gold or Diamond level.
- ART (Netherlands): some models carry ART 3-star certification, which the brand notes is often required by insurers in Europe.
- Seatylock's own 1–18 scale: an internal rating the brand says is aligned with Sold Secure levels. Seatylock itself recommends weighing independent ratings alongside any manufacturer scale.
- Locking hardware: the brand says its locks use automotive-standard wafer tumbler cylinders, and each lock comes with 3 keys and a key code card for duplicates.
No bike lock is impossible to defeat, and Seatylock says so itself: its FAQ states "no lock can be completely grinder-proof." Higher ratings are meant to add time and effort for a thief. Match the rating to where and how long you park.
Shop the Seatylock Highlights
A quick look at popular Seatylock locks and the prices we saw in October 2026.
Prices change often; the brand's site always shows the current price.
The Lineup: Find Your Lock
| Lock | Price | Who it suits (ratings as stated by Seatylock) |
|---|---|---|
| Foldylock Mini (75 cm) | $85 | Short stops or a second lock; Sold Secure Silver |
| Foldylock Clipster (75 cm, wearable) | $80 | Riders who want to clip a lock to a belt or bag; Sold Secure Silver |
| Foldylock Compact (85 cm) | $95 | Everyday city commuting; Sold Secure Silver, 14/18 on the brand scale, 1 kg |
| Foldylock Pride (85 cm) | $95 | The 85 cm Foldylock in a special Pride edition |
| Foldylock Classic (100 cm) | $125 | Commuters who want more reach; product page lists Sold Secure Gold and 16/18, 1.6 kg |
| Foldylock Forever (90 cm) | $135 | E-bikes and higher-risk areas; ART 3 stars, 18/18, 1.76 kg |
| Foldylock Elite (110 cm) | $145 | Longest folding lock; Sold Secure Gold and ART 3 stars |
| Mason 140 / 180 / 220 / 300 U-locks | $75 / $80 / $85 / $90 | Sold Secure Diamond; 140 and 180 also ART 3 stars |
| Viking Silver chain (90 / 110 / 140 cm) | $65 / $70 / $80 | Lighter chain, 7 mm links; Sold Secure Silver, 12/18 |
| Viking Gold chain (90 / 110 / 140 cm) | $100 / $110 / $125 | 10 mm links; Sold Secure Gold, 17/18 |
| Seatylock Trekking or Comfort | $69 | The saddle-that-becomes-a-lock (not Sold Secure certified) |
| SeatyGo Urban / Dynamic | $85 | A detachable saddle you can take with you |
Accessories include cable loops ($15–$20), a U-lock mounting bracket ($15), replacement cases and duplicate keys. A large new U-lock, the Ultra D5, is listed at $280 with a launch planned for November and a "save $45 on the product launch" sign-up on the homepage.
Folding lock or U-lock?
Foldylocks fold into a case that mounts on your bottle-cage screws (or the included straps), and the brand says the case is rattle-free. They give you more reach for odd-shaped racks. Mason U-locks carry the highest Sold Secure level in the range, but the mounting bracket is sold separately.
Which Foldylock?
Seatylock's own guidance: Forever or Elite for e-bikes and high-risk areas, Classic or Compact for daily commuting, and Mini or Clipster for maximum portability. One note: the Classic's product page lists Sold Secure Gold, while the FAQ still lists Silver, so check the current product page if that rating matters to you.
Shipping, Returns and Warranty
| Policy | What Seatylock says |
|---|---|
| US shipping | Free shipping across the US (site banner) |
| Dispatch | Within 2 business days |
| Delivery | USA 4–7 business days; international up to 15 business days |
| Package protection | Optional Route protection for 30 days after delivery |
| Returns | Unused items in original packaging within 14 days of delivery, for a full refund or store credit |
| Standard warranty | 12 months from purchase |
| Extended warranty | Free extension to 3 years if you register your keys within 3 months |
| Not covered | Theft, damage from attempted theft, lost keys or locks, misuse and cosmetic wear |
Register your key code card right away. It extends the warranty and is the only way to order duplicate keys later.
Pros and Cons
| Pros | Cons |
|---|---|
| Independent Sold Secure and ART ratings on most locks | Higher-rated folding locks cost $125–$145 |
| Free US shipping, 2-day dispatch | Short 14-day return window |
| Free 3-year warranty with key registration | Warranty doesn't cover theft |
| Rattle-free frame-mounted Foldylock cases | Mason mounting bracket sold separately |
| Key-alike duo packs for two bikes | Some rating details differ between pages |
| Unusual saddle-lock and detachable-saddle designs | No public promo code |
Who Will Love Seatylock?
- City commuters who want a lock that rides on the frame without rattling.
- E-bike owners looking at Gold- or Diamond-rated options.
- Two-bike households who'd like one key for both locks.
- Riders tired of saddle theft who like the SeatyGo idea.
How to Save
- Buy a key-alike duo pack for two bikes — for example two Foldylock Compacts in black for $185 instead of $190.
- Pick the rating you need — the Mason 140 at $75 carries the brand's Diamond rating for less than any Foldylock.
- Register your keys for the free 3-year warranty instead of paying for a replacement later.
- Sign up for Ultra D5 launch alerts if you want the new lock — the homepage mentions $45 off at launch.
- Check our deals page before you buy.
Seatylock FAQ
Are Seatylock locks certified?
The brand says all its locks except the standard Seatylock saddle model are Sold Secure certified at Silver, Gold or Diamond level, and some also carry ART 3-star certification.
Where are Seatylock locks made?
Seatylock says its products are made at its privately owned facility in China.
What if I lose my keys?
Lost keys aren't covered by warranty, but you can order duplicates with the code on your key code card. Register it on Seatylock's site to keep it on file.
Can I return a lock?
Yes, within 14 days of delivery if it's unused and in its original packaging, for a refund or store credit.
Our Verdict
Seatylock makes thoughtful locks with independently rated security, frame-friendly mounts and a free 3-year warranty when you register your keys. Pick the rating that matches where you park, think about a duo pack if you have two bikes, and check our Seatylock deals page before you order.
How we wrote this: SweatproofGear researched Seatylock using its official website, FAQ, product listings, security certification details, prices and policies in October 2026. Security ratings are as stated by the brand. We haven't personally tested these products and we don't invent ratings or discount codes. We may earn a commission if you buy through our links, at no extra cost to you.