Lightweight, compact cinch lock that is stronger than a cable lock and lighter than a U-Lock. Made with steel and Kevlar® bands. Ideal for cycling and outdoor gear to protect against theft opportunists.
LIGHTWEIGHT · COMPACT · SECURE · DURABLE · RESETTABLE COMBINATION
Available in 3 sizes & colors.
- · LIGHTWEIGHT: Weighs only 120g - 235g and is easily stowed. So light and portable you won’t even know you are carrying it.
- · COMPACT: Coils to a diameter under 3 inches. Keep it in or around your saddle bag, backpack, in your pocket, or anywhere you want.
- · SECURE: Multi-layer steel and Kevlar® bands (18mm wide) make it very cut-resistant, and stronger than cable locks.
- · DURABLE: Chip-resistant Cerakote® paint and Santoprene® plastic that will not scuff or harm finishes.
- · RESETTABLE COMBINATION: 3-dial combination lock. You may also reset the combo as needed.
| OTTOLOCK Applications | |
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| Bicycles | Tools, Ladders & Generators |
| Auto/Truck Cargo & Racks | Canoe, Kayak & SUP |
| Travel & Luggage | Motorcycle Helmets & Soft Bags |
Security is addressed with a patent-pending, multi-layer steel and Kevlar® band design, making it extremely cut-resistant. Conventional theft tools like wire or bolt cutters will have a hard time against OTTOLOCK. It is not a replacement for a U-Lock. For maximum security, use a redundant locking method with both a U-Lock and a secondary lock.
Proudly designed and manufactured in the USA
Download the Infosheet
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Length |
18 in (46 cm) Cinch Lock |
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Weight |
18” = 120g |
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Security |
3 resettable combination wheels / aluminum head |
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Materials |
Chip-resistant Cerakote® ceramic paint |
Frequently Asked Questions
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My OTTOLOCK band is stuck. What can I do? There could be a few reasons for this. Follow these steps to help release your stuck band.
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My wheels are locked up. What can I do? It's likely that the combination reset may be only halfway engaged. It's important to use a push pin, not a safety pin or paperclip, as they do not have the necessary strength required. Follow these steps to help unlock your wheels.
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What is the design intent behind OTTOLOCK? OTTOLOCK is designed for short stay security and protecting against theft opportunists, while simultaneously meeting desired low weight and compact size requirements. OTTOLOCK is not designed for overnight or long duration security in high-crime metropolitan areas.
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How does OTTOLOCK compare to other types of locks?  Click here to see OTTOLOCK stand up to bolt cutters compared to a cable lock.
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How secure is OTTOLOCK? Will it stand up to an angle grinder or hacksaw? Will it replace my U-Lock? We have tested the product under many failure modes including tensile pull, torsion, impact, flame temperature and more. You can watch several testing videos on YouTube to see how the OTTOLOCK stands up. Specific to hacksaw or angle grinder theft attempts, a motivated thief will be able to defeat the OTTOLOCK in a relatively short period of time. It is important to note that all locks can be defeated with proper tools, technique and time. OTTOLOCK is not a replacement for a U-Lock. For maximum security, use a redundant locking method with both a U-Lock and a secondary lock.
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Which length OTTOLOCK do I choose for bicycle use - 18" versus 30"? Either length is a good choice as both are extremely lightweight and compact. See table below. Your lock up application makes a difference as to which is a better choice. Many "weight weenies" or serious riders prefer the 18" as it works great for a mid-ride stop and locking a single tube to a post or pole up to 4-5" diameter. The 18" fits in or cinched around a small saddle bag. The 30" is far more universal and better for horizontal racks or grabbing hard-to-reach features. The 30" version also provides a little extra band for "cinching" tight. Many consumers are buying both lengths.  |
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How do you lock & unlock OTTOLOCK? TO LOCK:
TO UNLOCK:
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How do you reset the OTTOLOCK combination? You can change the combination from the factory setting to a combo of your choice. This is really handy if you have multiple OTTOLOCKs and need to remember easily. To reset the combination:
Watch the video demonstration of how to reset the combination. If you're having trouble, watch the troubleshooting video.
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How do you use the OTTO Mount? The OTTO Mount is an excellent accessory for on-the-bike carry of OTTOLOCK, but it's important to be sure and hook all four (4) of the silicone tabs to the ladder strap if you use the OTTO Mount to carry your lock on your bike. The fit should be snug but do not over-stretch or over-tighten. Also, we advise putting the lock head near the post or tube you mount to so that the weight is closer to the bike frame. We've tested the heck out of the OTTO Mount on long gravel rides and 5-hr MTB adventures and there is no problem if the hooks are hooked. For step-by-step installation instructions, click on the Support/FAQ tab on the OTTO Mount page. 
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Why is it so difficult to cut? Without a long technical explanation, the answer lies in the combination of these multiple layers, how the layers slide upon one another under load, and the aspect ratio of materials relative to cutting jaws.
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What is the band made of? The band is made of ten (10) total layers – a combination of high-temper stainless steel and braided Kevlar® internally, and anti-scratch Santoprene® on the exterior. 
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Can OTTOLOCK be daisy-chained? Yes! You can connect multiple OTTOLOCKS together for added length.
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Why does the head have a 3-digit combination vs. a 4-digit combination head? Will there be a keyed version? A 3-digit combination head is more than adequate security given the initial design intent and intended use applications. Extra features have been designed into the combination wheels to prevent conventional thief jamming or picking methods. A key version or higher-security OTTOLCK version will be considered in the future product road map and determined based on market demand.
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If you need assistance or have additional questions, please email support@ottodesignworks.com
I searched and read reviews looking for a lightweight yet secure lock for our quick stops in restaurants and such, this lock is the answer. It weighs very little, folds up small ( we bought two 30 inch models) and fits easily in our small saddle bags. Easy to use, I would rate it 5 stars but for the number rotation system. I wish the individual number dials had a stronger detention system, my fingers too easily bump and move the adjoining dials when setting to combo. But love this lock.
The customer service provided by Ottolock is outstanding. My wife has been using a lock daily since May 2017. The tip broke and she asked me to see if I could fix it. It could not be fixed. Since it is a relatively new product I thought Ottolock would like to know about the tip problem. I sent pictures. I knew there was no warranty. I was totally blown away when within 30 minutes of my email to Ottolock I had a reply! They knew about the problem and replaced the 2 locks we had purchased in May 2017. It appears they have fixed the problem. Time will tell. This is incredible customer service deserving of all stars. We like how the lock stores easily and is easy to use. We actually use one when we are gone on holiday to provide an additional lock our French doors. Definitely a product we will recommend to friends and family.
This lock is super light and handy. I bought this as part of kickstarter and I’m glad I have it. I mean, I’ve had a krypto lock forever but should nice it weighs a ton I never have it when I need it. However, I’d say the smallest size would be as tough to use as the u-lock and the 30” doesn’t measure to that distance after being locked in... so if weight is everything and the 80 grams difference helps you to carry it everywhere which I do in my camelback, that’s sensible. Still every time I use it I wish it just a bit was longer. I vote for version 2 with a 45” option. If I get another one it’ll be the bigger size.
Got this lock as apart of Kickstarter. We have been using this lock pretty regularly for riding around the city, bike camping, and long distance rides. The lock is lightweight and the ease of use is the best part. Fits in any bag, jersey or pants pocket for any adventure, and we hardly even know it’s there. We both love the lock very much, however the metal core has started to poke its way from the bottom of the silicone. It’s almost always exposed at this point, with the Kevlar now showing. While the lock still works, it is now forced into a bag as it’ll snag clothing or could even scratch the bike frame. Overall awesome lock, just needs a tweak in design so the core has room to move when it gets rolled up.
You'll will never want another lock until you've tried this one. I carry 2 locks, the Ottolock is my main goto lock. It's easy to use, stores nicely and is lite-weight. I have the 30-inch lock which is long enough.
I love this lock, but I'm finding the 30" length makes it hard for me to lock my bike up to anything with a diameter larger than 6 inches. My bike's frame is carbon and I don't want to put the frame directly up against what ever I'm locking the bike to.
To solve this problem I've ordered the 60" model.
If you have any doubts about what length you need go with the longer version. I
Locks have always been a cumbersome experience and with the Otto lock - I can happily say that those days and woes are gone. Easy to use, light, and actually is going to keep my bike safe! If you don’t have one yet, you’re missing out.
Had an issue resetting the combo and since they were closed for the holidays I sent a message.... Tamy got back to me and walked me thru the reset.... The reset pin needs to be pressed in firmly pay the first little click.... Thank you for the reply and not making me wait till Tuesday.... Probably ordering another to daisy chain them
My early (KickStarter) OttoLock became difficult to operate as rubber wore off the tip. I sent a photo to the company, and they sent me a free replacement within a week. The new lock has a reinforced tip.
I ordered my Ottolock and when it came I could not change the lock combination or get it to work properly. Once I got hold of the company, Amy was fantastic in resolving my problem, calling me 3 times to help me and make sure my lock was working properly. Now that is a company who stands behind their product!
Ottolock is beyond excellent. Having a VERY light lock that you can carry around with minimal effort but that is still robust enough to ensure that you prized machine doesn't walk away while you run an errand is PRICELESS! I use my frequently for coffee stops on training rides or for errands going to and from work. It's perfect for quick stops. Would recommend 100%.
After a very long wait my locks arrived, with an unwelcome and unexpected bill from the shippers. My $100 Ottolock purchase ended up costing $165, with $25 shipping, £19 VAT, and £11 "handling fee". My advice - don't even think about buying this lock if you live outside the USA. Customer service didn't even respond to my concerns about these unexpected additional charges.
OTTOLOCK is light weight, non scratching, very quick and easy to use and most important...secure. Cannot be cut with bolt cutters. It fits easily in jersey pocket without knowing it is there, or use frame attachment holder that comes with the lock.
The small lock is a perfect size for me to lock my bike with another to prevent a 'grab-and-ride' while we stopped for coffee...don't have to constantly keep an eye on our bikes!
I suggest also offering a bike lock with a longer strap.
I ride a Cannondale "Super V 3000", where the Top Tube connects from part way down the Down Tube, not from the Head Tube. The lock works fine on bike posts where I park parallel to the stand. But the lock is too short to use on the bike racks where you put the front wheel in. Another foot longer would be all I needed.
Took advantage of the early Kickstarter offers, and it was a long wait... but the wait was worth it. Small investment to hang on to my very overpriced ride. LOL Now I can enjoy a beverage out, without constantly checking on the status of my bike. Purchased both the 18" & 60" . Big one for family outings, or to bring along on RAGBRAI, as sometimes, bikes unfortunately, disappear.
Part of being a cyclist is stopping at the coffee shop on every ride, or the local watering hole post ride. With the otto lock, you can get your hardest training days in without worry and also keep your machine safe no matter where you decide to stop. Peace of mind and relaxation is all key to good performance. This lock allows for all.
I've been using my ottolock for a couple of weeks now and it is a total game changer for me. Not having to carry a u-lock has made my day to day so much better! The lock works great and I love it.
My locks arrived this week and I love them. So easy to stow in my jersey pocket or rack trunk bag and so lightweight. It's perfect for those urban adventures where I just want to stop, lock and shop for a few minutes or grab coffee. I also plan to take on my longer rides where I don't need an overnight lock but need a lock for the stops. I would recommend the lock to friends.
In one word this is a GREAT lock. It conveniently attaches to your frame, fits easily in a pack, jersey pocket or just around your arm. The combination means you don't have to worry about a key and the innovative strap easily fits around poles or stands to secure your bike. This is a great lock for moving around town and safely securing your bike as you pick up something from the store, grab a espresso, or catch a movie. A great new lock for our growing bike culture.
In the past, when headed to the coffee shop to meet friends, my routine was: wallet, check. Keys, check. Cell phone, check, Mini U-lock.... ugh. I constantly found myself looking for a small hip pack or bag just to carry my u-lock. My u-lock is heavy, bulky and doesn't give me many locking options for a short ride to run errands. I love that my 18" Ottolock can attach to virtually any place on my bike frame that I can dream up OR it can pack down and into a pocket. The Ottolock is incredibly lightweight and convenient. Obviously I wouldn't use the Ottolock for overnight security, but to go for a 3+ hour road ride and stop on the way home for snacks and not have to worry about checking on my bike while I am eating is an amazing feeling.
I've had my OTTOLOCK for 3 days. I've used it to lock my bike up in about 10 different places in downtown San Francisco. It's awesome. I even saw a guy try to take my bike (because the otto is pretty small). He gave it a few yanks, and gave up. The lock is light, bright (I have orange), and just cool.
Got my OTTOLOCK last week and it is FANTASTIC! No more carrying around my bulky u-lock when I'm running quick errands. I still use the u-lock to keep my bike secure for overnight safety, but when I'm headed out to lunch or an errand I only take my OTTOLOCK. Frame attachment strap works great, but I usually just put the lock in my pocket - its that small and light weight. THANK YOU!