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RoundLock Padlock

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RoundLock Padlock

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  •    Info
  •    Tech
  •    Video
  •     Reviews

Our custom-made SecurityForBikes RL21 RoundLock super-compact padlock. Sold Secure Motorcycle Gold/Quad & ATV Gold/Bicycle Gold/Motor Scooter Gold approved with any appropriately-approved chain and also on its own (e.g. as a disc lock).

The RoundLock is lighter and a lot more compact than the Squire SS65CS whilst offering similar security at a much cheaper price. Note that this is a 2-part lock where the top section comes out completely and is then re-inserted sideways through the chain and into the female lock receiver. It may be slightly harder to use than the SS65CS as a result (although you typically need 2 hands to fit that lock to a chain as well).

Disc detainer anti-pick cylinder with 9 discs, protected by rotating anti-drill hardened alloy steel plate.

3 keys supplied.

Keyed-alike available at initial order only (not available retrospectively) when ordering more than one lock together, and only amongst other RL21 locks and/or DIB-Series D-Locks. These locks can't be keyed-alike with any of the Squire locks. Please note that the Keyed Alike option must be selected for *all* locks in the set that you wish to be Keyed Alike.

Very compact and a perfect partner for Protector 16mm chains at a great price! 

Not suitable for our 19mm chain unless the optional extra RL21A socket is also purchased and that is used in place of the standard RL21 socket. The RL21A socket is available separately to adapt this lock to fit our Protector 19mm chains - Please Click for the RL21A Socket product listing.

The RL21 can sometimes be used with our Protector 13mm chains - it's a close fit and the manufacturing tolerance on the chains can make-or-break the idea of the combination. Check to see if we have the corresponding Package Deal available - if it shows as available to order then we have a batch of chain that fits the RoundLock!

This lock can also sometimes be used as a motorcycle disc lock - Check that you have a suitable opening that will take the 21mm diameter shackle in your brake disc or disc carrier and that there is clearance behind the disc for the lock to sit. Sometimes spokes or the wheel hub are too close for the lock to fit in the gap. When it fits your disc, you can then use this with a chain when at home and as a disc lock when out and about.

The RoundLock is generally not suitable for 11mm (or, sometimes, 13mm) chains nor for use with hasps, padbars, etc.

The lock body is 40mm diameter and in the locked position it measures approximately 77mm long overall. That excludes the the plastic cap at approximately 6mm thick.

21mm diameter shackle.

Weight: 0.55kg

Click for more technical information on the RoundLock.

Here is a short video overview of the SFB RoundLock, showing how it can be used with our Protector 16mm and 13mm chains and, with the optional RL21A socket, with the 19mm chains (opens in a new window)

And this video shows how to fit the lock to the chain (with a non-Noose chain) (opens in a new window)

98 Product Reviews - Average rating 4.9 / 5 (Click here to expand and to show more reviews)
Super Simple and Super Effective
- 29/06/2023
An ingeniou slittle lock. Small and mighty! I'm super happy with this working alongside my accompanying 22mm Titan Chain for 'motorbike at home' security. Used with the Sub Major Ground Anchor, a high quality alarmed disk lock and a security camera on 24/read more
Brilliant!
- 21/06/2023
I bought this after the review on Bike Social. It's a seriously good piece of kit, especially when used in conjunction with the Protector chain. It's an ideal size for under-seat storage, or slipping into a bag/pocket. It feels really sturdy and well maderead more
Genius lock
- 09/06/2023
Love the compactness of this lock, especially given the level of security it offers! Works really well with a 16mm chain. Highly recommend.
Lightweight, secure and versatile - EXCELLENT
- 05/04/2023
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.
Piece of mind
- 04/04/2023
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.
Manufacturer Pragmasis
Price (inc VAT): £44.95

 

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