We’ve seen several different solutions to try to create theft-resistant and even tamper-proof bolts to secure the most often stolen parts of a city bike – the wheels and the saddle/seatpost combo. Last fall we got the details on the NutFix system from German lock specialists Abus. How it works is by replacing the standard nuts & bolts that secure your components with a special nut that can only be operated when you rotate the bike 90° onto its side, so that as long as you lock your bike up securely to a fixed rack or object, your components will be there when you return. The NutFix system is available now, and we have some more details and pricing after the break…
NutFix comes in three varieties: complete quick release axles kits, individual axle nuts for bolt-on wheels, and seatpost collars. They each come in a variety of sizes to fit many different bikes, and are available now at first in three colors: red, black & silver (the other colors look like they will come later.)
The axles can be used for bikes with quick release wheels. They are sold both in pairs for $70 or individually (front or rear) for $35 each. The come in 100mm & 135mm lengths and are operated with 8mm wrench flats (and use an 8mm open end wrench or thin profile adjustable wrench to remove it) once you lay the bike on its side.
The individual axle nuts work with bolt-on wheels, and you only need one NutFix (one side per wheel) to secure each wheel. They are selling for $35 a piece and are available to fit 3/8”, M9 & M10 threaded axles. To open them to take your wheel out you will again need to drop the bike onto its side and here uses a larger 15mm wrench, which conveniently is also the most common pedal wrench.
Four different sizes of NutFix seatpost collar are also available – 28.6, 30.0 31.8 & 34.9mm – to fit a wide range of bike likely to serve around town. They are a complete solution of clamp& bolt, so replace the bolt-on or quick release collar that is already on your bike. That means they won’t fit every bike, as some have integrated seatpost collars, or use a different size tubing. To see if you can us one on your bike, remove the entire clamp from your bike and measure the diameter of the seattube extension above the toptube. The black anodized aluminum clamp and colored NutFix setup sells for $45, just be sure to install it straight (the NutFix cap pointing directly to the side) or you may end up fighting the bike to get it leaned properly to loosen it with an 8mm wrench.
Abus locks are available in the US & Europe through many independent bicycle dealers. Check their product pages’ Buy Local Now button for one near you.