I recommend this lock they will protect your bike very well

Es de buena calidad, aunque es poco incómodo quitar la contraseña

No key to have to remember, sturdy and secure.

Me encantó es super seguro, el problema fue que se le safo la parte en donde se resetea la contraseña y puede que sea un área que lo vuelva inseguro

El producto es de buena calidad. Sin llaves físicas. Lo que no es un punto fuerte, es su peso. Pesa mucho. Pero esat dentro del estándar de candados de esa calidad.

ive had these locks for bikes in the past this one is easier to use cuz of the combo lock you can change to your own numbers. I use it for a double gate that meets in the middle. very sturdy and easy to open and close, the ones with keys are difficult!

It's probably not a super strong lock, but it's strong enough for our uses. So convenient to have a combination U-lock. We bought a bunch for the family, set them all to the same combo, makes it very convenient for any family member to grab any lock and go. Convenience makes for more biking which is more good.

I don't see what the complaints are about. Seems nice and as advertised. I cannot attest to the bike mount though. I never use them anyway. I just throw it in my backpack and go. Seems heavy-duty, yet not too heavy to pack around. Nice plastic at top of U to protect against scratching your bike. Easy to read number display. Easy to set combination. Very nice

This lock is so hard to open. I have had to give it away. It hurts my hands to try to use it and I end up asking someone to help me. It is sturdy and It would take a huge cutter to break it-- and I really liked the idea of a combo, so I don't have to take more keys with me when I ride and commute.

Best lock over had. Yeah u need to find something tiny to tether it to but it really is heavy duty. The. Bike mount works very well, as well.

I have used this product for about a week. It is heavy and seemingly pretty sturdy. The overwhelming downside to me is that the one I was shipped is super hard to operate. Several times I have had to monkey around with the thing for approximately a minute to either get it to close or open. I am returning mine in favor of something that easily does what it is supposed to do.

This lock seems solid enough, and the shackle is large enough to fit around many things you might lock a bike to. But it turns out to be pretty difficult to operate.Negatives:1: The combination mechanism's wheels are recessed sufficiently to be hard to manipulate (especially the first and last wheels). This slows you down a lot unlocking the lock compared to other combination bike locks we have used.2: The correct numbers have to line up along an index mark on the side of the lock. The index mark is the same color as the plastic it's molded into, and it's thus hard to see. The photo shows these marks in white, but that wasn't the case on the lock we got. Given they printed yellow in other areas of the same part I don't understand why they didn't make these index marks stand out better.3: After setting the correct combination you need to slide a button over with quite a bit of force to actually open the lock. It's probably fine for most adults, but will be difficult for anyone under about 7.4: The shackle only fits into the locking mechanism in one direction. Our keyed U-locks can go on either way and once you've become accustomed to that it is much nicer.Our young kids had trouble with points 1-3 above. Since we bought the lock to secure their bikes we needed a different solution. We ended up ordering an Abus Rayado 1360 instead and are much happier. Of course the Abus isn't a U lock and costs more, but we despaired of finding a combination U lock we would like. We also weren't comfortable with the very low level of security offered by even relatively thick cable locks.

3 YEARS IN: I have two of them I use everyday. I just bought a third. If combination lock is the route you wish to go this thing will get the job done. It ain't perfect but FAR better than average. I like and recommend it.9 MONTHS IN: I used this every day for my commute and it has worked out well. I like it and have no interest in replacing it as I'd expected. The recessed numbers are a pain but I generally use the middle two and they are very workable. The yellow rubber on the bottom of the U is starting to loosen and I will guess come off soon. The bike connector for carrying it while riding ended up settling in on the frame below the seat going backwards toward the wheel. It works here well except the piece on the look which clicks in place spins far too easily and I'm always having to move it back 90 degrees then setting it in place. A minor pain but very tolerable.I like it. I'd recommend it with a few caveats mentioned.EDIT: Despite all my concerns below, I'm using it daily pretty happily, using the middle rings only to work the combination. I like it and bumped it up to 4 stars.INITIAL BELOW:Initial thoughts on first use are not positive, this thing is huge and heavy. Don't know what all is in the combo section of the lock but it better be good cause it is HUGE. The directions for the attachment to bike when not in use have you attaching the lock to strange locations on side of frame which is going to be in the way. Think the only reason they do this is because this thing is HUGE (specifically the cap to the U is huge). It is making my keyed kryptonite ulock look mighty good at the moment. Also, I'm right handed and drive combo locks with right hand. I can't access the right hand number because my thumb doesn't fit because they made the case on the right of this ring far too large to allow a finger to turn it comfortably. So, I have to use the right hand for 2 rings of the combination and my left hand for the last ring on the right. Bad design.I'll be back after further attempts to use this lock but initially it is not looking like it is going to be useful. Did I mention the cap on the U is HUGE ?EDIT: If I was going to hacksaw this lock, I'd look for the smallest diameter portion of the U. Most locks there is only one diameter. This lock has a smaller diameter at the end of the U on both sides where it inserts to the cat to lock. This would be fine if it went into the cap and disappeared so you didn't see it. On this lock the U doesn't got all the way into the cap and these smaller diameter portions of the lock are visible and available for hacking.More, I said the right ring was not turnable with my right thumb, it turns out neither end combo number rings are turnable easily because of the design on each side of them being to tight and too large. Might just as well be a 2 digit lock cause I can't turn the outside ones with it sitting in front of me on my desk let alone trying to do it quickly to lock or unlock the bike. Bad design.