Kanulock 4M Lockable Tie Down Straps

Top 3 Reasons we love this
1. Reinforced stainless-steel cables make these virtually impossible to cut
2. Locks your boards or kayak to the roof so you can leave the car stress-free
3. Different lengths mean you can choose the perfect strap for any setup — from a single surfboard to a stacked pile of kayaks

Product Description
With KanuLock straps your board, kayak or SUP can’t be slid out or sliced free — these straps are reinforced with stainless-steel cables along each edge, making them resistant to knives and virtually impossible to cut. They’re also easy to use, quiet on the motorway, and designed to lock directly to your roof rack so your kit stays exactly where you left it. Whether you’re grabbing food after a surf or leaving your gear on the car while you explore, KanuLock straps offer peace of mind that regular tie-downs simply can’t.

Available in four lengths — 2.5m, 3.3m, 4m and 5.4m — each size uses a different coloured buckle for easy identification. The 3.3m option is perfect for most surfboards, paddleboards and single kayaks, while the longer 4m and 5.4m versions are ideal for canoes, big SUPs or stacking multiple boards. The stainless-steel reinforcement runs up both sides of the webbing, giving strength without adding bulk, and the buckle locks using a simple key system. Once locked, the strap can’t be loosened or removed without the key — making opportunistic theft almost impossible.

Using them couldn’t be easier: feed the strap through the buckle like a normal tie-down, tension it, close the locking clasp and turn the key. That’s it — your gear is locked to the roof rack and secured against both movement and theft.

Which Length Should You Choose?
• 2.5m — Ideal for shortboards, small single surfboards, bodyboards or securing one small craft
• 3.3m — Best for most kayaks, SUPs, windsurf boards, longboards and day-to-day surf setups
• 4m — Great for canoes, large touring kayaks, big SUPs or multiple surfboards stacked together
• 5.4m — Perfect for wide canoes, very large SUPs or carrying several kayaks/boards at once; best for van roofs or wide bar setups

As a general rule: If you’re unsure, size up. Extra strap can be tied off easily, but short straps can’t stretch!

Features
• Reinforced with stainless-steel cables
• Cannot be cut with a knife
• Locks directly onto your roof rack
• Reduces wind noise compared to standard straps
• Four lengths with size-specific coloured buckles
• Easy to use — works like a normal strap but locks with a key
• Prevents opportunistic theft of boards, kayaks and canoes

Expert Advice
If you regularly leave boards on the car while grabbing food or loading up for a second session, KanuLock straps are a lifesaver. Standard tie-downs can be cut in seconds, but the stainless-steel reinforcement in these makes theft extremely difficult — thieves simply move on. The locking buckle is easy to use even with cold hands, and the straps make far less wind noise, especially on longer motorway runs. If you travel with boards on the roof even a few times a year, these are one of the best security upgrades you can buy.

Q & A

Q: Can someone still slide the board out of the straps?
A: No — the stainless-steel cables run the length of the straps, preventing them from being pried apart or loosened without the key.

Q: Can these really not be cut?
A: They can’t be cut with a knife or blade. The internal steel cables make it extremely difficult for opportunistic thieves who typically rely on quick cuts.

Q: Do they work with any roof rack?
A: Yes — they work with standard bars, aero bars and most factory-fitted roof rack systems.

Q: Which length should I buy for a single longboard or SUP?
A: The 3.3m straps suit most SUPs and longboards, but if your board is particularly wide or thick, go for the 4m length.

Q: Can I secure multiple surfboards?
A: Yes — the 4m and 5.4m straps are ideal for stacking a few boards together or tying down larger loads.

Q: Are they noisy at speed?
A: Much quieter than standard nylon tie-downs. The materials and shape dramatically reduce wind flutter.

Q: Do they rust?
A: No — the internal stainless-steel cables resist corrosion, even when regularly exposed to salt water.

Q: Are they safe for painted boards?
A: Yes — the straps are soft and wide enough to avoid pressure dents. Just ensure you use correct tension, as with any tie-down system.

Q: What comes in the pack?
A: You get a pair of lockable straps, two keys and a storage bag — everything you need to secure your gear immediately.