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Mammoth Security Shackle Disc Lock

Mammoth Security Shackle Disc Lock

Customer Product Reviews

4.5 Stars from 70 reviews

Mammoth Security
Our price $45.91 $49.63
Showing 1 - 20 of 70
Mammoth Security Shackle Disc Lock
June 25, 2019

Well priced sturdy lock

Well priced sturdy lock, easy to use and see.

Mammoth Security Shackle Disc Lock
November 30, 2018

Can't fault it

It's a good solid lock. It's heavier than it looks, and feels sturdy. It only just fits on the front disk of my Z900RS, but that's because I hadn't measured the disk's thickness, width, or the dimensions of the holes, before I bought the lock. oops! Even in its carry pouch, with lanyard, it wedges nicely under the seat (taking the only available piece of space once the toolkit's come out - well...). I particularly like the sliding cover over the keyhole - I doubt it's watertight, though, but it'll keep the muck out. All in all, I'd recommend it (especially for the price).

Mammoth Security Shackle Disc Lock
October 24, 2018

Mammoth by name mammoth by nature

Sturdy lock that was a lot bigger than what I expected. So much so that it wouldn't quite fit comfortably under the passenger seat of my MT 07. That said it can still be squeezed in as long as you're not fussed about having the black metal plate back in position before putting the seat back on. Reminder cable bright and colourful to stop you making a fool of yourself. All in all a good product so far.

Mammoth Security Shackle Disc Lock
October 17, 2018

Quality disc lock

Really heavy duty disc lock, highly recommend.

Mammoth Security Shackle Disc Lock
October 9, 2018

Solid lock

Good solid lock, a fair bit bigger than expected & a bit awkward to get over the disc.

Mammoth Security Shackle Disc Lock
September 29, 2018

It fits....just

It doesn't fit on the front disc of my 2019 Z1000SX, but it does go around the wheel spoke so not a total loss. I am at the moment trying to store it in the seat compartment but with the tool bag and puncture repair kit but with no success. The quality of the lock however is good and should keep the crooks at bay for some time.

Mammoth Security Shackle Disc Lock
September 24, 2018

Massive lock

Fits my ER6F front disk just and the day glow reminder, have the big chain too, good products. No room under my seat as its full already so have to carry in the backpack. Those looking for a disk lock but unsure give it a go, if not satisfied send it back.

Mammoth Security Shackle Disc Lock
August 27, 2018

Chunky, heavy duty lock

Just about fits on my disc with a bit of jiggling. The heavy weight of this lock gives peace of mind, and the hidden shackle must make it difficult, if not impossible for thieves to cut through.

Mammoth Security Shackle Disc Lock
July 27, 2018

It's big

It's heavy, large, very visible and Thatcham approved at a reasonable price. It does not actually fit on the front disk of my 2015 Triumph Street Triple R, but it does fit on the wheel spoke so achieves the same aim.

Mammoth Security Shackle Disc Lock
June 9, 2018


Big CHUNKY disc lock with a storage pouch and the ever important reminder. Would deter would be low life thieves as the shakle is buried in the lock so very difficult to cut off.

Mammoth Security Shackle Disc Lock
June 8, 2018

Fits GSX S1000 but only just

Have purchased mammoth products before so was already aware of the good quality. Only just fits my bike but then that's all it needs to do. Comes with pouch and fits neatly under the GSX S pillion seat along with the disc lock reminder coil. Which incidentally is just long enough.

Mammoth Security Shackle Disc Lock
June 2, 2018

Seems to be quality

Fits a 2013 ZZR1400 front disc. Seems to be a good quality product, useful to deter thieves.

Mammoth Security Shackle Disc Lock
May 21, 2018

Good solid lock

Solid lock and easily fits on the front disc of my Transalp. I did read the description of the lock but was still surprised at how heavy it is ( about 750g, that's over 1lb in old money) and it is about the same size as an average shampoo bottle so won't fit in your pocket like my old disc lock. Having said all that I'm still pleased with it.

Mammoth Security Shackle Disc Lock
May 5, 2018

Easy to use but useless against angle grinder

This is the best value disc lock with Thatcham approval that I could find and I had no problems getting it on the bike. However less than a week after it went on, someone with an angle grinder removed it in a couple of minutes when the bike was in an underground car park. Fortunately their getaway was blocked and I didn't lose the bike. I then researched a 19 mm thick armoured chain and Squire padlock, only to discover NOTHING will protect you against an angle grinder. I realised the solution was to park the bike close to the car park entrance where the noise of an angle grinder could be heard outside. Fitted the 19mm chain & Squire padlock around the bike and a concrete pillar because even an angle grinder would take 5 minutes to get through it, and bought another of these disc locks as a deterrent for those times when I'm out shopping and the bike is in full view. No-one's had a go at it yet (which is why I can only give it an average) and the yellow spiral cord is a great reminder to remove it before you ride off. As long as you recognize the shortcomings of a disc lock, this is a good value Thatcham approved lock.

Mammoth Security Shackle Disc Lock
April 26, 2018

Awkward to fit but does the job

Not the easiest to fit to the bike but can get it on there and does the job.

Mammoth Security Shackle Disc Lock
April 9, 2018


A bit tricky to get on as it is quite long, but once it is on, without the key it isn't coming off. The cable could do with being another 6 inches long

Mammoth Security Shackle Disc Lock
March 27, 2018

Does the job

Bigger than I expected but practical in that it is well encased to protect from damaging the bike. A good solution for portable Thatcham protection.

Mammoth Security Shackle Disc Lock
January 25, 2018

Good deterrent

Big, bold and secure. Hard fitting to my Fazer but it just about fits a certain way. Does slightly rub off the rim but it does work.

Mammoth Security Shackle Disc Lock
January 10, 2018

Solid, if you can get it on

Very solid lock, but not easy to get on my Sprint ST - it pushes against the wheel when locked on, and I'm a bit concerned about this putting pressure on the disk. Also, the reminder cable is a waste of time, unless you're on a mini-moto.

Mammoth Security Shackle Disc Lock
November 20, 2017

Portable temporary security

Solid, well engineered alternative to the Oxford (crazy supply delays). Carry pouch fits snug under the seat (Tracer 900). Takes a bit of getting used to (just fits front disc) and link must be deep-seated to engage. Warning cable is just long enough.

PLEASE NOTE: The views and opinions expressed in the above reviews are solely those of the author and are not necessarily representative of the views of SPORTSBIKESHOP LTD.