How to Inspect Tires to Pass Your CDL Pre-trip Inspection TEST
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- Опубликовано: 5 май 2024
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For the purposes of the pre-trip inspection, tires are a major component. Learn how to inspect tires to be successful on your road test.
Inspecting a Tire for a CDL Road Test
Now you need to know for the purposes of a road test that tread depth on the front is 3mm (1/8 inch OR 4/32 in NY and other states) minimum to pass the road test or to pass and MVI (Motor Vehicle Inspection) that the tread depths.
On the rear tires it can be 1/16 inch OR 2/32" in NY and other states or 1.6mm.
The other criteria that a tire has to have to pass a road test - it cannot have any cuts or gashes in the tire that are longer than 2.5cm or one inch, and there cannot be cuts or abrasions in the tire that expose the chord inside the tires.
If any of those criteria exist, the tire won't pass, will not pass an MVI, you will not pass a road test, and if you show up with tires with those conditions for road test, you won't be able to take the road test.
Unsafe Tires
On the top of this tire-this is a front tire-on this truck you begin to see that this tire is beginning-there's a dip here in the tread. This tread is worn deeper than this tread. And this side - so this tire has uneven wear - you can see that it's worn more on this side of the tire than it is on this side of the tire. This front tire on this truck is not safe and needs to be replaced. Tires on the front of commercial vehicles have to be brand new.
Tire Wear Bars
Wear Bars
After you pass your road test, you don't really need to know the information that is required in terms of 1.6mm on the rear, 3mm on the front, and gashes that are not longer than 2.5cm. What you do need to know is inside the tread are wear bars. And you can see the wear bars here.
If the tire tread is down to wear bars on the steer tires on the front, the tire needs to be replaced. Now as I said, steer tires on the front of the trucks-commercial vehicles, buses those types of things-have to be new tires.
A new steer tire on the front of a commercial vehicle is $600 to a $1000, depending on the type of tire. This tire is not a very expensive tire, thus it's abnormally worn on the front and will soon need to be replaced. So you either spend a little bit more and get a better quality tire and it'll last longer.
Now the reason, because a front steer tire is $600-$1,000 - the reason they put recaps on the rears and on the trailers is because a recap will cost you about $375-$400. There's considerable saving in getting recaps for the rear of semi trucks and the trailers. They're also allowed on the rear of buses, but not on the steer axles. They have to be brand new. That's a little bit of information about tires on commercial vehicles.
As well, other information about tires will help you to stay employed when you begin work as a commercial driver - bus or truck.
Finally, requirements for tires that will allow your vehicle to pass an inspection and not be put out of service by authorities if you are pulled into the scale house.
0:00 How to Inspect Tires to Pass Your CDL Pre-trip Inspection TEST
0:05 Whacking Tires - What Does it Tell You?
2:10 2 Most Common Tire Sizes & How This is Important
2:48 Retread Tires
3:24 Front Steer Tires on Big Trucks
4:38 - What You Need to Know After You Pass CDL Test
6:00 Smart Points to Remember
7:00 Indications that the Tire Needs to Be Replaced
7:45 Free Weight Scale Checklist
Good luck on your road test!
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Hello! Back in Mexico when I was a graduate student, I interned for Firestone. I worked as a field technician with one of the largest trucking companies in Mexico. I also worked directly with one of the largest suppliers of re caps.
There are two main treading processes, Bandag that is now owned by Bridgestone/Firestone and Marangoni. Bandag uses the classic strip recap process. This process uses a strip that is cut to size by an operator. It is stapled in place on top of a band of adhesive that then is inserted into a sleeve and vulcanized for curing.
Marangoni is a much more advanced process and initially it was used to recap car tires. I had a full set of recaps in my VW beetle and were some of the best and most grippy tires I had ever owned.
The Marangoni process vulcanizes a whole new layer of rubber and it completely encases the core (used tire). The core is inserted in a die and then the rubber is injected and vulcanized. The result is a tire sometimes better than the original with tick walls and an aggressive look.
Later, Marangoni created a process for truck tires and this is one of the reason you don't see so many alligators anymore. It is not just an improvement in the adhesive, but the entire process.
For trucks Marangoni uses a ring instead of a band. This means there are no seams that can come unglued by overheating. The ring is slightly smaller than the core and an automated machine is used to expand the ring that is pre cured. The inherent rubber band effect of the ring being stretched to fit, and the vulcanization process, and the fact that almost all steps, except the preparation of the core are highly automated create a a very stable unit with little to no potential failure points.
Hi lapserdak24 - Thank you for that exceptional information my friend. I learned a lot from your comments. All the very best, Cheers Rick
Can you do a review on the questions about the tires frequently ask on the test
Nice video Rick, very valuable information. thank you.
Hi Milton Bran - you are most welcome my friend. All the best, Cheers Rick
Thanks good tips
Hi Jorge Gutierrez - thanks for your comment. If there's anything further we can do, drop us a note. We'll be more than happy to help out. All the best, Cheers Rick
Smart Drive Test Hi sir
no, thank yuo, for showing yuo knowledge
I really appreciate this because I just finished a course truck driver. thanks again.
Great Info!!!
Hi Les Sims - Thank you for your comment. And you are most welcome. We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Put your hand on the outer tire when you thump either and the way it vibrates tells you a lot about the amount of pressure in the tire. It's not a replacement for a pressure guage but gives a rough idea.
You never ever want to hit those tires with anything I’ve seen people do that and have the tire explode on them the tire pressure can be anywhere between 95 and 120 psi and remember when a tire explodes it can lift the truck off the ground always use a tire gauge
Hi Joey Haynes - Thank you for your comment. I've never heard of a commercial tire exploding from being hit. And very few bus or truck drivers have neither an air gauge, nor the time during a pre-trip to put a gauge on 10+ tires. As I say however, always hit the tire on the tread and not on the sidewall. All the best, Cheers Rick
Clearly you don't know what your talking about bc if a 3lbs edge could blow that tire just by hitting it then every port hole or dip in the road or tire Grove would blow the damn tire and that don't happen soo know what you are talking about and use at least common sence before commenting something as stupid as this
GOODY GOOD GOOD!!!😁
Not enough information. What do the numbers and letters mean? How long is it before a tire expires after manufacture?
Hi Stew's Logistics, LLC - Thank you for your comment. Information for another video my friend. I'll see if I can find someone to do a video to provide that information. All the best, Cheers Rick
in America they want to get you for every small thing, spoiled country.
Why do you think that? Cheers Rick