Just got my second one of these having been impressed by it’s top performance in Bennett’s bike social lock testing. It’s clearly bombproof as well as being compact, not so heavy and can be used as both a disc lock and as a super tough padlock on suitable chains (I use it with the adapter to fit the 19mm chain I have at home). At this price why wouldn’t you get one?

Great quality lock chosen after a lot of research. Using as a disc lock on some planned trips and will be using it with a Pragmasis chain and groundanchor that I will be ordering in the near future for home security.

Love this compact padlock - works perfectly with my Protector 16mm chain, but I can also take it out with me to use as a disc lock.

I've been using a Roundlock padlock with a 16 mm chain for a short while now, including through winter, and haven't had a problem with it so much so that I decided to buy another one to use as a disc lock.

Lets be clear, however, that a disc lock is essentially a visual deterrent and that, amongst many other things, a thief could simply lift the front end, and thus the bike, into a van if it was parked using only a disc lock and therefore I'd always say use a disc lock and a chain.

And so, as a disc lock, this is set aside from its competitors simply because of its nimbleness and unique design. As opposed to an open shackle vulnerable to all kinds of possible techniques sold from high street bike stores this has the ability to be fitted in reverse so that the lock faces away from the outside of the bike and thus a little harder to attack. Not impossible to remove, mind. Lets not forget that a disc lock on the rear brake or sprocket is more effective than on the front of the bike, albeit slightly weird if you've never heard or done it before.

I've given it four stars because the plastic lid broke of my first one after a while and I won't hold out hope that this one will last any longer. Also four stars because the "keyed alike" option is only available in any one given purchase and instead a database with recorded codes specific to any given key would be preferable and far easier to spread cost over a period of time as not everyone can afford two locks, that they might eventually need, in one go. Also now have two chunky black keys to carry around rather than one, annoying slightly.

Happy purchase and the likes of Pragmasis continue to offer security and decent prices that far outweigh their high street competitors (if you can call them that).

As always continued updates from Pragmasis staff via email as to progress of order in a very efficient time period, much appreciated.
{Pragmasis Comment: Unfortunately it's not a case of recording key numbers in a database. The factory can only make batches of locks, and all with about a 6-month lead time, so doing retrospective Keyed-Alike is not viable, I'm afraid. If the locks were assembled individually, by us, the price would probably be a lot higher. Batch production obviously makes it a lot more efficient, but this is the downside. We did raise the concern with the factory about the plastic caps being brittle, occasionally (2 reports in over 500 sold, if I am remembering correctly). The material spec has not been changed but it was a different production batch. Hence, something we will monitor. Apologies for the inconvenience. We have spare caps available, should they be required.]

1. Excellent service and communications by Pragmasis.

2. The Roundlock is finely machined and feels good to the hands.

3. The Roundlock, both regular socket and RL21A socket versions, while great to use in practice while sitting on the couch or at your desk, it becomes a bit more difficult when trying to get the Rounlock off your motorcycle's disk, particularly, in the rain and with gloves on isn't nearly as easy, as for example, unlocking a D lock.

The problem stems from being unable to tell which direction the keyhole is facing when you are inserting the key at an angle from your body, as the lip of the lock obscures the hole from view, especially when trying to make unlock the lock in an unwieldy position such as on your motorcycle's disk. So you end up having to do a LOT of key jiggling, or ending up kneeling down to get a good look, which is not nice in the mud or the rain. Plus, by design, the Roundlock is supposed to spin to make it harder for thieves to attack it, but this also means that if you try to twist the key prematurely, the lock spins. I think I will use the Roundlock mainly for locking it to a chain, after pulling the end link of the chain through another link in the chain, and not as a disklock, to ensure I'm not having to bend down and be in such an awkward position to use the Roundlock.

3. The keys' blade areas are good quality and precisely machined, they do not feel sloppy/catchy.

4. The keys' black plastic handle areas are a bit large, I feel, and have unnecessary corners. Please compare and contrast to the plastic handles of the spare keys (not the main key, the Kryptonite's main key's handle is huge and ungainly with a completely pointless light on it) you get with the premium range of Kryptonite D Locks (not their budget range), which are oval, smaller and fit better into pockets.

5. Keyed alike is extremely useful, so I now need to carry 1 key with me instead of 4 or 5.

[Pragmasis Comment: I am sorry you are finding the RoundLock can be awkward to get the key inserted when you are using it as a disclock and are unable to get to a position where you can see what you are doing. Many 'disc detainer' cylinder locks, such as our RoundLock, have the same issue about it being important o get the key fully inserted before you start turning the key, which is why we mention it in our videos, but when you can't see if you've got the key in line with the front of the keyway, could make it more difficult with all similar locks, I suppose. As you said, this is rather by design, as the rotating aspect is important in terms of increasing the resistance to attack by thieves.
Nobody has ever said they find the head of the key too large! We will look at the spare keys you mention on Kryptonite's top-end products, as you suggest, but the fact that their 'main key' is even larger suggests they don't think the size of the key is too much of an issue. Interesting, though, and something we will keep in mind. Others may be concerned if we made the key smaller as it may become difficult to operate when wearing gloves. It can be difficult, as different people have different situations and different priorities. Anything like this has to be a compromise across as many different scenarios as we can cover, but this is all useful feedback for us. Thanks again.]

Excellent sturdy, easily transported lock. Fast delivery and very good communication from the seller. Unfortunately it seems to incompatible with most of my bikes, I bought it to secure my 1978 kawasaki z650 but it wound not fit in the hole in the disc or rear sprocket, wouldn't fit harley fat boy discs or bmw hs1100 wheels either. I'm using it on my triumph street triple 675 and it works perfectly. If you have a modern bike with normal discs don't hesitate to buy this lock, for somthing older or oddball do a little homework first. This would be a 5 star review except for the fitment issue.

I’ve got the 19mm chain but the round lock flops around all over the place,and because in the video he holds the lock at the top of the link of course there’s no where to attack but soon as you let go there’s about three inches to get in and attack it,and yet to find a disc it fits on
[Pragmasis Comment:
I'm very sorry you are not impressed. I have not heard about you making any comments back to us so please get in touch via e-mail or phone or Facebook and we will see what we can do. Regarding your comments on the RoundLock and the 19mm chain (I don't know if you're using it with our Protector 19mm or a chain from another manufacturer?) then you need to use the RoundLock Combo (RL21A) socket to get compatibility, and it will occupy around 30mm of the 100mm internal clearance of the link. However, that 100mm also has 19mm of additional obstruction from the preceding chain link, and another 19mm of obstruction from the interlocked opposite end link, so there is actually a gap of around 100 - (2 x 19) - (e.g.) 30mm = 32mm of actual remaining clearance in real-world usage. Given that this space is sitting in between a bulky chain link and the side of the RoundLock, it is nigh-on impossible for a thief to get any credible form of attack going within that gap. If you have another form of attack in mind that could exploit such a small and awkward gap then please e-mail us with details as we don't know of anything that any thief could benefit from.
Regarding the compatibility with brake discs, that is simply down to the dimensions that we publish for the lock as compared to the openings in your brake discs. I am sorry if you were expecting it to fit and it doesn't. If you wish to get in touch to request a return and refund, then we would be happy to look at that for you?]

Bought this after watching bennetts review that this could be used as a standalone disk lock for any motorbike, it was a lie, it may have fitted that old wheel in the video but it will not fit the modern disks on my yzf r1, i have emailed pragmasis about this but have had no response to date and i expect that i have been sold a lie and had my money stolen based on this lie.
[Pragmasis Comment:]
I'm sorry you got the impression that the RoundLock will fit any motorbike disk. It doesn't. Bennetts do not actually say it will fit any bike and neither do we. Indeed, we say you should:
"Check that you have a suitable opening that will take the 21mm diameter shackle in your brake disc or disc carrier."
The above is directly above the Add to Cart button in our shopping cart. We are sorry you didn't notice what we say about this product as that could have avoided you buying something that won't fit your bike.
You e-mailed us at 6:53pm on 19-Apr-20 and we replied at 10:21am the following morning. We said "There is no problem with you posting it back for a refund." and we stand by that. To date, we have not had any resonse from you. Please check your spam trap in case it is a little enthuastic in its filtering.
Again, we are sorry you felt that you had been given "lies" and feel you have had your money "stolen". I repeat, we have offered to issue a refund if you return the lock to us.
We always try to be very explicit and open in the way we sell our products and apologise for any inconvenience you have suffered.