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Trelock FS455 Folding lock



Neat and tidy, but not really strong enough for lengthy lock-ups

At every product is thoroughly tested for as long as it takes to get a proper insight into how well it works. Our reviewers are experienced cyclists that we trust to be objective. While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. We don't intentionally try to break anything (except locks) but we do try to look for weak points in any design. The overall score is not just an average of the other scores: it reflects both a product's function and value – with value determined by how a product compares with items of similar spec, quality, and price.

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Linked-plate locks are becoming increasing popular as they pack down small and can offer decent protection. The FS455 from Trelock is far from being awful but doesn't offer the same protection as a similarly-priced U-lock.

The FS455 comes with a plastic cage to mount to your bike frame, and does pack down small: 19x7x4cm is the folded size. It's not particularly light at 1138g, so we had high hopes that the six hardened steel linkage plates would stand up to some serious abuse.

We went after the Trelock with the bolt croppers first, having snipped through a few cheaper link locks with ease in the past. To its credit the lock survived that without much to-do, but when we put the persuader to work it wasn't long before a rivet popped and we freed our stooge bike. The FS455 held out for a total of 2 minutes and 2 seconds, but had we started with the bar it would have been less than a minute.

Given that it's easier to break than a U-lock, why should you buy one? well, if you really must have a lock that a) fixes to your bike, and b) is nice and small, it does fit the bill, but you'd be better off with a Master Lock Street Cuff which is a good bit sturdier for less money. It's hard to recommend this lock, really: it's a fair wedge to buy one, and it's not that strong.


Neat and tidy, but not really strong enough for lengthy lock-ups

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Make and model: Trelock FS455 Folding lock

Size tested: n/a

Tell us what the product is for, and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

# PLC™ 5-pin locking cylinder

# corrosion protection

# dust cap

# Length 85 cm

# Folded: 19 x 7 x 3,5 cm

# Plastic bracket easily attaches to frame

Rate the product for quality of construction:
Rate the product for performance:

I expected better

Rate the product for durability:
Rate the product for weight, if applicable:

Quite heavy for the amount of protection it offers

Rate the product for value:

You get more for less elsewhere

Tell us what you particularly liked about the product

Neat-looking on the bike

Tell us what you particularly disliked about the product

Not strong enough

Did you enjoy using the product? No

Would you consider buying the product? No

Would you recommend the product to a friend? No

Overall rating: 4/10

About the tester

Age: 38  Height: 190cm  Weight: 98kg

I usually ride: whatever I'm testing...  My best bike is: Genesis Equilibrium with SRAM Apex

I've been riding for: 10-20 years  I ride: Every day  I would class myself as: Experienced

I regularly do the following types of riding: time trialling, cyclo cross, commuting, sportives, general fitness riding, fixed/singlespeed, mtb, Mountain Bike Bog Snorkelling, track

Dave is a founding father of, having previously worked on Cycling Plus and What Mountain Bike magazines back in the day. He also writes about e-bikes for our sister publication ebiketips. He's won three mountain bike bog snorkelling World Championships, and races at the back of the third cats.

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