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It's important to secure your Sondors THIN or Fat eBike, here are some Locks recommendations: 

Please note: Cable Locks are considered as unsafe, we already have stolen Sondors eBikes which were secured with a cable lock!


The Club UTL800 Utility Lock
The Club UTL800 Utility Lock is a part of The Club line of quality products by Winner International.
Many Sondors Owners are using this particular Lock and recommend it. Buy now:

on Amazon.com
on ebay.com



Abus Bordo BIG 6000 (Foldable Lock)
The Bordo Folding locks feature a linked construction to provide maximum flexibility to secure to racks, fence posts, signs, etc. Compact design offers many frame mounting possibilities. Coating to prevent damage of the bicycle's paint - ABUS Premium cylinder for maximum picking protection. Buy now:

on Amazon.com
on ebay.com


Kryptonite 999492 Black 14mm x 60" (1415)
Extreme motorcycle and scooter security for the highest theft locations. 12mm six sided chain links made of 3t hardened manganese steel for maximum strength. Durable protective nylon cover with hook and loop fasteners to hold in place. Buy now:

on Amazon.com

Do you recommend or know another lock? Tell us! 



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On 7/29/2016 at 4:01 PM, kriss said:

I'm waiting for my Titanium lock to come.



Hi!  Wondering if you got your 560G lock yet, and if you have any impressions?  Did you need 2 for the Fat Bike or was one good enough?

I'm looking hard at the foldylock or Bordo Folding lock, but intrigued by the 560G lighter weight.



Edited by robgazy
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  • 10 months later...

A rash of recent Sondors thefts made me take another look at my locking solution for Frankenbike, my electric cargo bike, which I am parking outside of stores in neighborhoods ranging from very good to not-so-good.  Formerly I was using the Club UTL800 Lock shown in Post #1 above (mostly because it fits so well flat on a rear rack) and a Brinks 5/8" x 7-feet steel cable.  I used each independent of the other to lock the frame and wheels.

Its clear in today's environment that corded steel cables - even those as big as the Brinks - are nearly worthless.  The modern thief keeps a portable angle grinder in a bag and can be through a cable in only a few seconds.  Literally a few seconds.  A U lock like a Kryptonite New York lock - several grades above my Club UTL800 - takes only about one minute - 70 seconds to be exact -  to make the necessary two cuts to get through.  A Kryptonite Fuggedaboudit lock increases that to just over two minutes.

So...whats the next step up?  Against an angle grinder, nothing is going to last forever.  The question is what will last the longest?  The answer is a serious security chain.  the closest mass-market product is the Kryptonite 14mm x 5-feet chain also shown in Post #1.  But... it weighs just over 15 lbs, and it still has the same U-lock holding it together that can be cut in under two minutes.  And... only 5 feet of length is not ideal for locking both bike wheels plus anchoring it to an object.

After some research I went with a UK-manufactured 13mm Pragmasis Protector 2-meter (6.5 ft) chain and a motorcycle-style rotating lock from lockitt.com. 



The security of the Pragmasis chains is fairly straightforward.  I'll let you do your own googling.  The manufacturer's link below is not the only source of info on them by far.  In addition to the boron steel construction, and a size that pretty much makes bolt cutters a waste of time, the links are extra long - much longer than the Kryptonite links.  This makes for a lighter weight per meter.  My 6.5-ft lock and chain weighs 14 lbs versus 15.1 for the 5-foot Kryptonite.  (14 is still freaking heavy) .

The rotating lock is a pretty trick piece of kit.  For starters it is relatively light weight.  It fits tightly over the chain so it is difficult to attack.

Another plus for me is as a visual deterrent.  Its a big freaking chain.  Its obviously not the easiest bike to steal.  Hopefully a thief will go steal the next bike over or the car a couple stalls down.

The downside besides weight is cost.  This solution was just under US$250.  About double that of a Kryptonite chain, or one of their Fuggedaboudit U locks.  But considering the money I have put into the bike and its upgrades, thats not unreasonable.  Nothing is perfect in this world and neither is this lock.  But its the best I can come up with.




Edited by MattRobertson
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I have one other related recommendation,. I find the best way to insure security is where I park. At almost all my stops I find secure parking. I park amoung the warehoused tires inside the service department bays, at both my local Walmarts, either in the hall inside the building, next to the door window at my Gastrointerolgyst & Plastic Surgeon's and inside the waiting room at my GP's Office. I have now what has become my reserved parking spot, inside, at my grocer's. Inside at my Coffee Shop, on the town square, where I stop for a tasty refreshing beverage. Most outlets and faculties are happy to accomidate me when I park in an out of the way spots and the need for security for such a Mobil and Expensive bike is evident. Lastly, if I'm unsure about secure parking, on an upcoming outing, I'll pack my cover in the Pannier and because all that peeks out is my fat tires it's unlikely anyone would try and lift the  locked cover to nab what looks like a motorcycle.  
Inside the foyer of my grocery store.


image.thumb.jpeg.ee6db7f5520d35d5f030adc59821e3da.jpegMy doctors waiting room


The Apple Store was glad to let me park inside









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Here's another idea to consider:  A seat leash.  


Myself personally, I have replaced the QR seatpost clamp with a traditional bolted clamp, which adds a bit of security.  However on both my fat ebikes I have installed a Thudbuster ST seatpost.  Those aren't cheap.  I have installed a seat leash to make it more difficult to swipe.

The US$6.25 53cm (just under 22") Akita security cable is nice and short. Its not advertised as a seat leash but it is one.  You can spot a leash vs. a normal bike cable when one side has a big loop and the other side has a very small one.


Install by looping the small loop end around your seatstay, near the seatpost.  Next, unbolt your seat from the seatpost, run the big loop inside and bolt the seat back on.  Done.  No lock needed and you can forget about it.  The leash will not get in the way of pedaling (I used a short velcro tie to affix it to the seatpost as you can see ... there's no need for this except to help medicate my OCD).  To steal the seat, someone now has to unbolt it from the seatpost.  If they also want the seatpost they have to unbolt that as well.  Or cut the 5mm cable (there is a 2.5mm seat leash on Amazon but its so thin you could use nail clippers to cut it... literally).

Here again, its not perfect.  But it will eliminate any casual snatch-and-run theft.  

If you want to install without unbolting your seat, loop the little end around your seat rail instead of the frame's seatstay, then use a padlock to either attach the other end to your rack, or your frame's seatstay.  Nowhere near as clean, but if you are averse to taking off and reinstalling your seat, this gets you home.

Edited by MattRobertson
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  • 8 months later...

Anything similar to Kryptonite New York Fahgettaboudit chain that's not so expensive (it's currently $143 on amazon)?

Looking to spend $50-60, probably 3-4' chain is plenty. Not many bike racks where I am so it's always on a tree or something so the foldy type locks probably wouldn't work. Currently have a fold mini...Thanks!

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On 7/27/2018 at 9:01 AM, Aerospace said:

Anything similar to Kryptonite New York Fahgettaboudit chain that's not so expensive (it's currently $143 on amazon)?

Looking to spend $50-60, probably 3-4' chain is plenty. Not many bike racks where I am so it's always on a tree or something so the foldy type locks probably wouldn't work. Currently have a fold mini...Thanks!

In a word:  No.  This is one time where quality is defined by price.  If you to spend less money you will have to accept less protection.  

Kryptonite chains are longer and really heavy, and outside your budget.  the shorter Pragmasis chains are lighter but priced even higher at $116 for 1.5M.  Pragmasis has a smaller diameter 11mm chain but 1.5M of it is $109.  Not much help.

You could go to a cable but even the thickest cable is only 30 seconds effort with bolt cutters and about 5 seconds against a portable angle grinder.

A 60" Ottolock is halfway decent... but a 3-number combo can be brute-forced in a few minutes.  And its still $75.

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  • 3 months later...

Just bought and installed this multifunction bicycle alarm. I travel into a major metropolitan area, the DFW Metrostool and most often a smaller city at the top of the Golden Triangle with two Universities with a rise in bicycle thefts in recent years. I always find secure parking, most times inside the buildings or  foyer, I am visiting or shopping in. 


But as an extra layer of protection, for when it’s locked up outside, this alarm will help thwart theves and alert everyone in the vicinity. It’s stealthy and could be hidden in the Triangle Battery Box of Fats & Thins, but that will reduce the alarm sounds. It fits perfectly under my Brooks England  B-17 Copper Custom saddle and the only disarming  switch is on the remote, so it can’t be deactivated on the unit under the seat.



  • Vibrationaly triggered alarm suitable for Bikes, Electric Bike, Motorcycles, Doors and Windows
  • 7 level adjustable sensitivity from gently touch to push or beat
  • Deterring thieves effectively by 113 dB loud alarm
  • Easy to find your vehicles by 6 kinds of bells with IP55 waterproof pc material shell
  • Installation by pasting with double-sided sticker or tieing it with zip ties. 



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