bing tracking image
  1. Bike Locks
  2. Trimax Locks
  3. U-Lock
  4. Keyed Unique
  5. Chrome
Trimax Disc U-Lock - 12.7-mm Shackle - Yellow

Trimax Disc U-Lock - 12.7-mm Shackle - Yellow

Item # TMX79ZR
Our Price: $20.62
You Save: 46%
Bike Locks
Orders above $99 qualify for Free Shipping
Shipping Weight: 1 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Need help with installation?
Locate installers near me
U-lock helps safeguard your bike or motorcycle against theft. Features a 12.7-mm thick shackle and chrome construction for enhanced protection. Rubberized coating protects your bike from dings and enhances grip. 1-800-940-8924 to order Trimax Locks bike locks part number TMX79ZR or order online at Free expert support on all Trimax Locks products. Great prices and Fastest Shipping for Trimax Disc U-Lock - 12.7-mm Shackle - Yellow. Bike Locks reviews from real customers.
  • All Info
  • Q & A (0)
  • Videos (2)
  • Photos
  • Why etrailer?

Trimax Locks Bike Locks - TMX79ZR

  • U-Lock
  • Keyed Unique
  • Trimax Locks
  • Chrome

U-lock helps safeguard your bike or motorcycle against theft. Features a 12.7-mm thick shackle and chrome construction for enhanced protection. Rubberized coating protects your bike from dings and enhances grip.


  • U-lock helps safeguard your bike or motorcycle
    • Perfect for motorcycle discs and looped cables
  • Chrome construction is corrosion-resistant
  • Rubberized coating protects your bike from dings and enhances grip
  • Includes 3 keys - 1 key includes a mini flashlight
  • Yellow color is easily visible


  • Shackle diameter: 12.7-mm
  • Inside dimensions: 2" tall x 1-11/16" wide
  • Limited lifetime warranty

MAX40YL Trimax Locks High Security Disc U-Lock - Yellow with 1/2" Shackle

Video of Trimax Disc U-Lock - 12.7-mm Shackle - Yellow

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Trimax Disc U-Lock Review

What's up, everybody Today we're gonna be securing this motorcycle with the TRIMAX U-Lock. This is gonna be great for your discs on your wheels. This can also be used with a cable lock, but I think the best way to do it is just to connect it to your disc. The span between this is an inch and five eighths in this gap, so what I'm using it for, I'm going around my disc right here. I'm taking the rest of it and locking that into place. Once it's nice and tight, and it's gonna be pretty tough to get anything back there.

I think the only thing that's gonna be able to get through this is a grinder, but I don't see anywhere where I can actually fit that tool in there. So I think this is a really good, secure way to lock your bike up. What this is gonna do if someone tries to take this thing, it's gonna go up, it's gonna hit that caliper on the upper end, and if they're just backing it out, there's a caliper on the lower end of this bike and that's going to cause some damage and the wheel is not gonna turn. Even if you have a very high horsepower bike, I really don't think even if you dump the clutch and just rip it, rev the thing, I don't think it's gonna break it. It's made of pretty hard material.

It's made of a hardened solid steel. So it's not really gonna break, but it does have a TVC lining all the way around it. So even if someone did try to steal it, it's not gonna sit here and scratch up my wheels or my calipers. So that's kind of nice. The little band that goes all the way around on the other end of it right here.

It's gonna be a half inch thick. I've cut some pretty big chains with this, half inch, no, so let's just see. One, it's really kind of tough to get it in there. But two, even if I put that on the ground and I'm putting all my weight, which is like 160 pounds on it, I'm not getting anywhere. So you probably have to grind this thing off, honestly.

Oh, man. Yeah, it's not going anywhere. If someone wants to take this off, they're gonna have to either grind it off and that's gonna make plenty of noise, so you're gonna know. When it's completely locked, like this, we're gonna have two inches from the inside of this little loop to the other end of our lock. And it is gonna come with three sets of keys. Notice how two of them are shorter than the other one. This one's got a little light on it. So if you have to undo it at night, this is gonna work pretty well. But we're gonna turn all lights off and test it out. It is plenty bright. So if your bike is locked up all day and you have to get it at night, even when you're in there, you can hold it down. It's pretty natural to keep it going. So it's a very, very nice addition. In my opinion, the TRIMAX disc lock is the ultimate way to lock up your bikes. If it's gonna fit, go with this. It can work with a cable lock or a chain, but I have not found a chain that this thing can't get through. So, I definitely recommend this, 'cause you can hardly even see where I tried to cut it earlier, and I was putting my whole force into it. So this is the best way to do it. So I highly recommend it for those nicer bikes of yours. For you all on the construction side, if you have a trailer, if you have a bike, a motorcycle, side by side, four-wheeler, you name it. We can also use this in conjunction with a chain. All we need is just an opening that is at least three quarters of an inch in diameter. That is just what this is with the sleeve on it. So you can link it around a tree with a trailer or whatever you may have, and use it with the chain. You can also use it like this..


See what our Experts say about this Trimax Locks Bike Locks

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate bike lock information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video by:
Chris R
Employee Adam E
Installed by:
Adam E
Employee Andy C
Installed by:
Andy C
Employee Sabrina W
Written by:
Sabrina W

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-800-940-8924