How To Check Tire Date Of Manufacture | Spot The DOT Date

The tire’s build date sits in the last four digits of the DOT code on the sidewall: week first, year last.

If you’re trying to learn how to check tire date of manufacture, the good news is that you don’t need special tools, a jack, or a mechanic. You need a clean view of the sidewall, a flashlight if the light is poor, and a minute or two to read the code molded into the rubber.

This small check can save you from buying old stock, trusting a low-mile used car too quickly, or running on a spare that has sat untouched for years. Tread depth still matters, of course, but the date tells you when the tire itself was made, not when it was fitted to the car.

Why Tire Age Is Worth Checking

Tires age even when the car barely moves. Heat, sun, long idle spells, low pressure, and plain old time can harden the rubber. A tire may still have decent tread and still be far older than you’d guess from its appearance.

That’s why the date code matters most on used cars, trailers, caravans, seasonal vehicles, and spare tires. Those are the places where “looks fine to me” can lead you the wrong way. A tire that spent years parked outside may be in rougher shape than a newer tire with higher mileage and steady care.

How To Check Tire Date Of Manufacture On A Used Car

Start with one tire and work in a circle. The process is the same on passenger cars, SUVs, pickups, and many trailer tires sold in the United States.

Find The DOT Marking

On the sidewall, search for the letters DOT. That mark begins the Tire Identification Number. You may see letters and numbers after it that relate to plant code, tire size code, and brand-specific construction details. The part you care about most is the final four-digit block at the end.

Read The Last Four Digits

The last two pairs give you the build week and build year. A code ending in 2319 means the tire was made in the 23rd week of 2019. A code ending in 0924 means the 9th week of 2024. Once you know that pattern, the code becomes easy to read at a glance.

Check Both Sides If You Need To

Don’t stop if you can’t spot the four-digit ending on the outer sidewall. The NHTSA tire buyer FAQ says the Tire Identification Number may not appear on both sides, so you may need to turn the steering, roll the car a little, or crouch down to view the inner sidewall.

Read All Four Tires And The Spare

One tire tells you only one tire’s age. A used car may have a mixed set. Two tires might be new, one could be older, and the spare may date back to the car’s first sale. Read every tire and jot the four-digit endings down on your phone so you can spot mismatches right away.

• Find “DOT” on the sidewall.
• Read the final four digits.
• Use the first two digits for the week.
• Use the last two digits for the year.
• Repeat on every tire, spare included.

What Else The Sidewall Can Tell You

The build date is only one part of the sidewall story. While you’re down there, it makes sense to read the rest of the markings. That gives you a clearer read on fit, load, speed, and whether the tire matches the car’s needs.

Sidewall Marking	What It Means	Why You Should Care
DOT code ending in 4 digits	Week and year of manufacture	Tells you the tire’s build date
205/55R16	Tire width, aspect ratio, construction, wheel size	Shows whether the tire fits the wheel and car spec
91V	Load index and speed rating	Shows weight and speed capability
Max load	Highest load the tire can carry	Helps when comparing replacement tires
Max pressure	Highest inflation pressure on the sidewall	Not the same as the car’s normal running pressure
M+S or 3PMSF	All-season or severe snow marking	Useful if you drive in winter weather
UTQG grade	Treadwear, traction, and temperature grades	Helps compare passenger tires in the same class
OE marking	Original equipment fitment for some models	May matter if you want the same spec as factory fit

Checking Tire Date Of Manufacture Before You Buy

If you’re buying new tires, ask for the DOT date before payment. That’s not being picky. It’s a normal question. Tires can sit in storage before sale, and a recent build date gives you a longer runway from day one.

If you’re buying from a private seller, ask for clear sidewall photos of all four tires. Ask for one close shot of the DOT ending on each tire, not just a wide photo of the tread. That small request can save a wasted trip.

Michelin’s tire sidewall markings page also shows the same week-then-year format, which is handy if you want a clean visual before you inspect a tire in person.

Ask these before you hand over money:

• Are all four tires from the same year?
• Do the date codes match closely, or is one tire much older?
• Has the car sat unused for long stretches?
• Is the spare original or a later replacement?

Don’t treat the date as the whole story. Storage conditions matter, inflation habits matter, and visible condition matters. Still, the date gives you a hard number, and hard numbers beat guesses every time.

When An Older Tire Should Make You Pause

An older tire is not an instant write-off in every case, but it should push you into a closer inspection. Dry cracking on the sidewall, tiny splits in the tread grooves, bulges, flat spots, and a harsh, stiff feel all point to age taking a toll.

This is where people get tripped up with low-mile cars. A garage-kept classic with old tires may look tidy, yet the rubber can still be far past its best days. The same goes for caravans and trailers that spend long spells parked with weight on one spot.

Date Alone Is Not The Whole Story

Read the code, then pair it with what your eyes and hands tell you. Check tread depth, wear pattern, cracks, repairs, and whether the tire still matches the vehicle placard or owner’s manual spec. Age is one clue. Condition finishes the picture.

What You Find	What It Usually Means	Best Next Step
All four tires within a few months of each other	Likely fitted as a set	Check wear and pressure history next
One tire much newer than the rest	Past puncture or damage replacement	Check brand, model, and tread match
Old date with clean tread	Low mileage or long storage	Inspect closely for cracks and hardening
Spare far older than road tires	Original spare left untouched	Read its condition before any trip
No visible four-digit ending on outer side	Date code may be on inner sidewall	Check the other side before giving up
Different brands and dates all around	Mixed replacement history	Check fit, load rating, and wear pattern

Mistakes That Lead To A Wrong Read

Most date-code errors come from rushing. A few habits cause most of the confusion:

• Reading another group of numbers instead of the final DOT digits.
• Flipping the code and treating the first pair as the year.
• Checking one tire and assuming the whole set matches.
• Skipping the spare.
• Judging age by tread alone.

If the code looks like three digits, you may be dealing with a much older tire design. On normal modern road tires, the four-digit week-and-year format is what you want to see.

A Simple Tire Check You Can Repeat Any Time

Once you’ve read a few DOT endings, the job gets easy. Make it part of your routine when you buy tires, inspect a used car, prep for a road trip, or pull out the spare. It takes only a minute, and it gives you one solid fact before you make a bigger call.

1. Read every tire’s DOT ending.
2. Save the dates in your phone notes.
3. Compare them with tread condition and wear pattern.
4. Match the tire size and ratings to the vehicle placard.
5. Replace guesswork with a clear record.

That’s the whole job. Find the DOT code, read the last four digits, and check the whole set. When you do that, you’re no longer buying or driving on hunches. You’re reading the tire’s own timestamp, right from the sidewall.