The Anti-Pinch Pin is a dead simple idea that seeks to address the common problem of people being unable to route a decent-sized chain through a lot of modern bikes. Hence many people either put the chain round the wheel, and obviously wheels can be removed, or they don't bother with a chain at all (and the whole bike gets removed...).
Rather than needing space to take the chain, the Anti-Pinch Pin is like a giant drawing pin and only the pin part of it, a 23mm diameter hardened steel bar, needs to go through the bike. You loop the chain onto one or both ends of the Pin, with a Squire SS65CS padlock clamping sideways onto a recess at the non-headed end of the Pin. There is a large head at the other end that prevents the thing being pulled through the bike.
 Another option is to route the chain from the head end of the Pin, under the bike and through the ground anchor and back up to the other end of the Pin. Attempting to pull the Pin through the bike will then make no difference as it forms a continuous loop with the chain.
One double whammy with this applies to many Ducatis, BMWs, Triumphs, MV Agustas, Honda VFRs etc, that have hollow rear axles:
If the hole through the axle is big enough to take a broomhandle, it'll probably be perfect for the Anti-Pinch Pin and you then get the advantage of basically preventing the rear axle and thereby the whole swingarm being removed and you can use a shorter chain, which is cheaper. (The swingarm is much harder to take off than a wheel, requiring the engine to be removed first on many bikes!) Hence we are offering a combined package that gives better security and at a great price!
Manufacturing Details: The Pin is made from 23mm diameter steel bar that is welded to a 70mm diameter flat head. A recess is machined at the non-headed end in order to accommodate the padlock, which fits on perpendicularly. The finished Pin assembly is case hardened with a carbonitriding process, bright zinc plated with a clear passivate, and deembrittled. Lock pull-off tests confirmed theoretical calculations that even heavy duty bearing pullers are unlikely to achieve anything at all - the shear area involved in the Pin itself is too great and the lock body is also extremely strong with the shackle giving further reinforcement (the SS65CS is CEN 6 rated, with a 10 tonne shackle retention). See below for independent approvals.
Lock Suitability: The Anti-Pinch Pin is designed to fit the Squire SS65CS (including Moto) padlocks, only! If you already have exactly that type of lock and a suitable chain & anchor then you can buy the Pin on its own; if you have a different type of lock then you are likely to need one of the Package Deals that includes the padlock and chain/anchor if required.
Important Note: Recent batches of SS65CS locks have shown wider variation on manufacturing tolerances and some do not fit the Pin! There are multiple dimensions and curvatures that are involved and it is not easy to measure these to be certain of compatibility. It is important that these fit, obviously, and if you already have an SS65CS lock we can't guarantee that it will fit all Pins. We can offer a lock modification service if you send us your lock in conjunction with ordering a Pin. The newest batches of Pins have been machined slightly differently to avoid this compatibility problem. Please contact us if you need further information on any aspect.
 Chain Suitability: If you already have a 16mm or 19mm Protector chain then you're sorted! 16mm and 19mm chains from other vendors are also generally compatible but you should check that the internal dimensions of the chain links will clear a 23mm circle.
Pin Length: The Anti-Pinch Pin is supplied in a wide range of lengths so that you can choose one that fits closely to your bike.
Note: The quoted length reflects the length of the Pin from under the Pin head. The padlock area and two x 16mm chain links usually require an overhead of 85-90mm, so you should typically choose a Pin that is the next size up from your bike's axle width etc plus 90mm. This allows for adjacent chain links interfering with each other a little (hence the extra 5mm).
Standard stock lengths are: 290mm, 340mm, 390mm, 440mm, and 490mm. The 290mm through 440mm lengths are all the same price; 490mm and any longer are more expensive. Note that these are all nominal lengths - the overall length (i.e. including the thickness of the head) is about 10mm greater and manufacturing tolerances mean these are not precise - please contact us if you have a particularly tight constraint on length. Likewise, please contact us if you have a requirement for a non-standard length.
Rear Axle Fitting Examples: 
BMW F800S and ST rear axle width 190mm + 90mm = Pin length 290mm (minimum - even slightly shorter is too short!)
BMW K1200GT rear axle width 190mm + 90mm = Pin length 290mm
BMW K1200S rear axle width 170mm + 90mm = Pin length 290mm
BMW R1200GS rear axle width 170mm + 90mm = Pin length 290mm
Ducati S2R, S4R & 695 Monster = Pin length 390mm
Ducati 748 (2000+) and 998 rear axle width 250mm + 90mm = Pin length 390mm
Ducati 996, 998 = Pin length 390mm (beware narrowing inside axle!)
Ducati 1098 rear axle width 255mm + 90mm = Pin length 390mm
Honda VFR800 FiW/X/Y/1/VTEC models, Pin length 340mm (OK for 16mm and also for 19mm chains). Ditto VFR750
Triumph T595 Daytona (single-sider) rear axle width 295mm + 90mm = Pin length 390mm (All Triples and Daytonas with single-sided swingarms are thought to use the same axle)
Always measure your bike to be sure, and ask us if you are in doubt!
Alternative Fitting Examples:
Several newer sportsbikes (e.g. Fireblade, GSX-R600K7) with braced swingarms have large holes through the swingarm structure
that the Pin will pass through, and that can sometimes accommodate a 16/19mm chain directly (so a Pin would not be needed, unless for convenience). Beware the exhaust obstructing access, though. Various other examples follow:
Aprilia SL1000 Falco = Pin length 390mm through frame
Harley Davidson Road King with a 625mm(+) Pin through the
centre of the frame; Fat Bob 440mm Pin.
Honda CBF1000 = Pin length 490mm on skew angle through dogbone links
Kawasaki ZX6R = Pin length 490mm
KTM 520 EXC, 525 EXE and 560 SMR = Pin length 340mm (fine with 16mm and 19mm chains)
KTM LC4-based bikes fine with 390mm Pin (640, 625, 660, Duke, probably new
690)
KTM Super Duke suits either a 390mm or 440mm Pin, dependent upon preferred routing
KTM 950 Adventure S and SE = Pin length 490mm (440mm can be very tight)
Suzuki Bandit 1250S = Pin length 650mm
Suzuki DRZ400 = Pin length 390mm
Suzuki GSXR600 K2 diagonal rear suspension fitting (see photos) 300mm + 90mm = Pin length 390mm
Suzuki GSXR600 K7
= Pin length 440mm (ideal for 16mm and 19mm chains), through swingarm
Suzuki SV650 = Pin length 440mm
Suzuki TL1000SV through the body of the bike (see photos) approx 380mm + 90mm = Pin length 490mm
Yamaha TDR250 = Pin length 440mm (plenty for 16mm and 19mm chains)
Yamaha XT600E
= Pin length 390mm
Yamaha Fazer 1000 = Pin length 440mm (snug fit for 16mm chains)
Always measure your bike to be sure, and ask us if you are in doubt!
Bike Suitability: We are accumulating information on the range of bikes that are particularly suited to the Anti-Pinch Pin - However, if your bike/quad/etc allows you to pass a broomhandle through a structural part of the bike's frame/suspension, you are likely to be compatible. Beware if you intend to go through the rear axle and you have a Ducati - Some of these have a stepped hollow rear axle so the hole appears to be OK but it narrows internally - Be sure to check that a 23mm bar will go right through!
Thanks to many people that have helped us to evolve our list of compatible fitments. We have more info available upon request.
Protection: We can now offer the Anti-Pinch Pin with lengths of low-temperature-shrink flame retardant black heatshrink sleeving. This is supplied un-shrunk and separate from the Pin in case someone goes and puts it on a hot exhaust and causes a fire - it's flame retardant but I still wouldn't tempt fate with my bike! It is more relevant for situations where the Pin will be resting against the fairing or carbs etc, and is generally unnecessary for rear axle fitments. Although it's classed as low-temperature shrink at 70 C, it is a struggle with a domestic hairdryer and something slightly more potent is preferable (e.g. a hot air gun or steam from a kettle, but be careful not to get burnt or scalded!). The rated temperature range for the sleeving is -55 to +135 C. We are also now including a vinyl end cap to provide protection from the very tip of the Pin. This black plastic cap is a simple push fit onto the end of the Pin and helps to avoid delicate items or finely finished surfaces from being scratched when the Pin is fitted. Beware, however, that this cap will not fit through the links on the Protector 19mm chain so it is more suited to the 16mm chain where it fits fine. If you are using the 19mm chain through a rear axle or similar one-sided situation, you can pass the Pin through both ends of the chain and then fit the vinyl cap. The Pin can then be passed through the rear axle and the lock fitted on the far side. Hence, it is possible to get the benefit of a protective covering for the tip of the Pin when using the 19mm chain, but it does restrict the way that the combination can be used.
None of these protective products are a substitute for careful handling of the Pin!
Approvals: The Anti-Pinch Pin has previously been Sold Secure Motorcycle Gold and ATV Gold (and all other categories Gold) approved. The approval was in July 2008 and remained valid until June 2009. It has not been re-submitted. It has not failed a test. The newest batches of Pins (August 2009, February 2010) have been machined slightly differently to avoid the compatibility problem relating to the SS65Cs lock. The Anti-Pinch Pin is a European Registered Design.
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