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The actual locking mechanism is the difference. The Trimax Heavy Duty #TMX42ZR has a much more robust hardened steel lock while the Trimax #TMX65FR uses a tube key style lock for the main lock.

...I am interested in Trimax Tmx42zr. And I need to know if it will fit my tire size. the size is LT 265 75 R16. looks like I would need the jaws to open 12 in. to go around my tire...

Oh it won't stand up well to an angle grinder at all. The Trimax Heavy Duty Adjustable Wheel Lock item #TMX42ZR is designed to stop the casual thief with bolt cutters. Not a dedicated criminal with power tools. I am sorry but I do not have…

Hey Barry, it sounds like you're looking for the Dexter Electric Trailer Brakes #K23-472-473-00. These are Dexter brakes that measure 10" diameter x 1-1/2" wide, and are designed for 3,000 lb axles.

The three most common lug stud sizes for a trailer are 1/2"-20, 9/16"-18, and 5/8"-18. In order to make sure you get the correct lug nuts you need to measure the lug studs on the trailer now as we have no way to look this up for…

Hello Tyrone, thanks for reaching out. We do carry the Trimax locks, but I am sorry to say that we do not offer replacement keys for them. You may be able to contact the manufacturer directly to get new keys, or you might be able to have a locksmith…

It is possible to move a trailer by just attaching to it's safety cables. Most people would avoid the method you described as the trailer will slam into the back of the tow vehicle while stopping. Basically it wouldn't be a thief's ideal…

Hey there Robert, thanks for the question and even though it is not listed, a 205/75-15 tire is absolutely compatible with the Trimax Trailer Wheel Chock and Lock #TMX75FR.

...I noticed my 5th wheel camper has 15 inch aluminum wheels and the holes for the lug bolts are 5/8 inch in diameter, while the lug bolts are 1/2 inch. Is this standard? The lug nuts are bulged 60...

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

Yes, since your ST205/75 R14 tire has a width of 8" and the Trimax Trailer Wheel Chock and Lock #TMX75FR can fit up to 15" tires, this wheel chock will work just fine for you. Attached is a review video for you to check out if you have not…

It's possible you could drill out the lock of the Trimax wheel lock part #TMX65FR and you'd be able to defeat it that way but Trimax doesn't share with us exactly how to defeat their wheel lock so we can't guarantee that would work.…