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🔐 Lock smart, ride fearless — security that fits your lifestyle.
The ABUS Combiflex 2503 is a lightweight, 120cm retractable cable lock featuring a customizable combination code and a sleek, mobile-phone sized case. Designed for quick, convenient security of bikes and gear in low-risk environments, it offers keyless, personalized protection in a compact, durable form factor favored by active urban professionals.


| ASIN | B01N4667FL |
| Best Sellers Rank | 4,491 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 16 in Cycling Cable Locks |
| Brand | ABUS |
| Colour | Black |
| Control Method | Touch |
| Controller Type | Number code |
| Country of Origin | Taiwan |
| Customer Reviews | 4.3 out of 5 stars 4,309 Reviews |
| Finish | Unfinished |
| Global Trade Identification Number | 04003318725012 |
| Included Components | 1 x Product |
| Item Dimensions | 19.5 x 13 x 3 centimetres |
| Item Type Name | Combiflex 2503/120 C/SB |
| Item Weight | 89 Grams |
| Item dimensions L x W x H | 19.5 x 13 x 3 centimetres |
| Lock Type | Combination Lock |
| Lock type | Combination Lock |
| Manufacturer | ABUS |
| Manufacturer Warranty Description | No guarantee. |
| Material | Metal |
| Model Name | Combiflex 2503 |
| Model Number | 2503/120 |
| Number of Pieces | 1 |
| Part Number | 2503/120 |
| Recommended Uses For Product | Safety |
| Recommended uses for product | Safety |
| Shape | Oblong |
| Special Features | Passcode Unlock, Unlock Smartphone, keyless |
| Special feature | Passcode Unlock , Unlock Smartphone, keyless |
| Style | Combiflex 2503 |
| Unit Count | 1.0 count |
L**L
Effective lock but read the instructions carefully first!
I rate ABUS kit functional with reasonable quality. This is a great product for it's intended purpose - ie preventing opportunistic theft by securing your bike for a few mins in low risk environments. It's lightweight and compact so can fit in a jersey pocket with no hassle. Fight the temptation to fiddle with it straight out of the box as you could get locked out of your own lock! The instructions aren't the clearest, but if you follow them carefully for first usage, you can set your own code and operate the lock quite easily.
H**L
Highly recommend. Small, light, long.
Weighs nothing, fits perfectly in small under seat bag & plenty of length to easily lock up bike. Excellent quality, Great value.
D**S
Security against the opportunistic thief
Good quality if a bit fiddly to use, worked a treat in a Eurotrain where luggage is nowhere near the seats
T**Y
Helmet lock
Good little unit to keep your crush Helmet safe if you don’t have a box on the bike. Don’t think it would give up much resistance to a pair of cutters though.
B**R
Simple, light but flimsy lock. Good for what it sets out to go.
These are small, anti opportunist thief locks. I have hand cutters which would snip through the cable in a single cut. But their purpose is not high security. They are designed to keep honest people honest. Mine are looped round a single motorcycle soft pannier and another around a roll top bag. Easily adjustable and very easy to set the lock number. I would not use them for overnight security but perfect to hinder a chancer at a cafe or filling station. I especially like the cinchable length. As an occasional cyclist, these would be fine for a cafe stop if your bike was in sight.
M**E
Good but mine broke after 2 months!
For what this is, a lightweight, easy to use, convenient cafe stop lock it is pretty good. Obviously it is not suitable for leaving your bike anywhere out of sight for any length of time but it can easily secure 3 bikes to deter opportunistic thieves. I would have given 5 stars but unfortunately on a recent stop the release button got stuck and no matter what I tried I could not get it to release, 30miles from home, leaving me with no option but to use brute force to break the lock. This happened after only owning the lock for 2 months.
K**B
A simple to use, but low security deterrent
It’s a very compact, easy to carry and easy to use deterrent. It won’t put up much of a fight to bolt cutters, but it will stop someone simply walking off with my bike. It may even make someone think twice about wanting to steal my bike.
V**G
Locked safe
Since we have friends who had their pushchairs stolen, I was adamant that we have a lock! Most of those on Amazon are shorter with 3-digit passcode lock. I was happy to find one longer. It is very compact and lightweight with straightforward instructions. The only bit I'm worried about is that it may feel too lightweight. I'm not sure how durable it would be, if someone actually tries to break it. Hence the 4 stars.
O**R
Una gran idea para las salidas en bici
Me ha gustado mucho esta solución portátil. No es difícil de romper con una cizalla, pero sirve perfectamente para evitar el robo al descuido cuando paras en medio de una ruta en un bar. No pesa nada y se lleva cómodamente en el maillot.
E**M
kalite
Çok kaliteli ve kullanışlı bir ürün
M**.
Kompaktes Schloss mit cleverem Design – ideal für unterwegs
Ich habe mir das ABUS Combiflex Spezialschloss gekauft, um unterwegs eine schnelle und leichte Sicherungslösung für mein Fahrradhelm, meinen Rucksack oder mein Fahrrad in der Arbeit zu haben. Wichtig war mir vor allem ein Schloss, das handlich und unkompliziert ist, aber trotzdem zuverlässigen Schutz im Alltag bietet. Erster Eindruck / Verarbeitung: Das Schloss wirkt sofort hochwertig verarbeitet – wie man es von ABUS kennt. Das Gehäuse ist robust, die Zahlenräder lassen sich leichtgängig einstellen und rasten sauber ein. Das Kabel fährt federleicht ein und wieder aus, sodass es schnell einsatzbereit ist. Anwendung & Praxiserfahrung: Das Schloss ist sehr vielseitig nutzbar: • Zum kurzzeitigen Sichern von Taschen, Rucksäcken oder Helmen. • Perfekt für Reisen, da es klein genug ist, um in jede Tasche zu passen. • Auch beim Sport (z. B. Fitnessstudio oder Fußballtraining) praktisch, um Ausrüstung kurz anzuschließen. Natürlich ersetzt es kein massives Bügel- oder Kettenschloss – dafür ist es nicht gedacht. Aber für die schnelle Sicherung bietet es ein gutes Maß an Schutz und vor allem eine große Flexibilität. Vor- und Nachteile: ✅ Vorteile: • Sehr handlich und leicht, passt in jede Tasche bzw Trikottasche • Einfach zu bedienen (Zahlenkombination) • Hochwertige Verarbeitung, langlebig • Vielseitig einsetzbar (Helme, Taschen, Kinderwagen etc.) ❌ Nachteile: • Kein Ersatz für ein vollwertiges Fahrradschloss • Kabel könnte für manche Anwendungen etwas länger sein Fazit: Das ABUS Combiflex Spezialschloss ist die perfekte Lösung für alle, die unterwegs eine leichte und flexible Sicherung benötigen. Ob auf Reisen, beim Sport oder im Alltag – es bietet schnellen Schutz für Gepäck, Ausrüstung oder auch das Fahrrad und überzeugt durch Qualität und Handlichkeit. Für meine Zwecke absolut ideal.
R**S
Super małe i lekkie zapięcie
Świetne kompaktowe zapięcie, które mogę mieć ze sobą na właściwie każdej przejażdżce. Oczywiście nie jest specjalnie mocne i pancerne ale do zostawienia roweru pod sklepem spokojnie się nadaje a mieści się w każdej kieszonce.
G**Y
does not work - release button broke the first day and Amazon doesn't provide a return option
does not work release button broke the first day and Amazon doesn't provide a return option ABUS products are usually top quality - really want a replacement item
Trustpilot
2 days ago
2 months ago