すべての車の所有者は、ツールキットに最高のタイヤ空気圧ゲージの 1 つを含める必要があります。タイヤに適切な空気を入れておくと、タイヤが均等に摩耗し、可能な限り最高の燃費が得られます。高価なタイヤをすぐに交換する必要がなくなり、給油のたびにお金を節約できる小さな投資です。
米国環境保護局によると、平均的なタイヤは 1.8 PSI (前部で 1.1 PSI、後部で 2.8 PSI) 空気が不足しており、空気圧が低すぎると、燃費が 0.4%、平均で 0.7% 低下します。 .あまり聞こえませんか？これは、1 ガロンにつき 3 セント多く、10 ガロンの給油で 30 セント多く支払うようなものです…平均的なドライバーの場合、年間 168 ドルです。これにより、入手できる最高のタイヤ ゲージ (および優れたインフレータ) に 20 ドルを費やすことが、特に 1 回だけ購入する必要がある場合は、はるかに簡単になります。
ラジアル タイヤは空気中で約 5 PSI 下がるまで低く見えないため、目で数ポンド低いタイヤを確認することはできません。財布にへこみ。また、ガスだけでなくタイヤの価格も上昇しており、タイヤの空気圧が低いと摩耗が早くなります。タイヤの量が少ないと、パンクやフラットになる可能性がさらに高くなります。
タイヤの空気圧計には鉛筆式、アナログ（文字盤）式、デジタル式があり、それぞれ一長一短があります。高品質の鉛筆スタイルのゲージはそれほど費用がかからず、何十年も使用できますが、読み取りが難しく、通常 2.0 PSI 刻みで最も正確ではありません。この価格帯では、校正済みのダイヤル ゲージが最も正確であり (レース チームは、数百ドルもする非常に正確なデジタル ゲージを使用しています)、通常は最も高価です。多くの場合、ホースが取り付けられているため、顔をタイヤのバルブに近づける必要はありません。便利なデフレーターが組み込まれているものもあります。デジタル タイヤ ゲージは使いやすく、最も読みやすいものですが、通常、認定されたキャリブレーションを備えたものにはより多くの費用がかかります。安価なものはコモディティ製品であり、いくつかの異なる工場でいくつかのスタイルで作られ、その後、さまざまなブランドとして小さな外観の変更を加えて販売されています.いずれかを選択する本当の理由があるかどうかを確認するために、さらにテストを行います。
以下の最適なタイヤ ゲージのおすすめをご覧ください。また、使用方法と適切なタイヤの空気圧に関する多くのヒントについては、目次を参照してください。
2 か所で回転する長い編組ホースと読みやすいダイヤルが、これを私たちのトップ ピックにしています。
7 つの圧力計をテストし、編集者の経験を生かした結果、編集者が選んだのは Rhino USA 75 PSI ヘビー デューティー タイヤ圧力ゲージです。 16.75 インチの編組ホースとチャック アセンブリ、0.3 インチの保護ラバー バンパーを備えた 2.0 インチの暗闇で光るハイ コントラスト ダイヤル、および真鍮のハードウェアが特徴です。 ANSI B40.1 規格に合わせて調整されていますが、範囲全体の許容誤差を示す等級は記載されていません。テストでは、他のゲージの 1.0 PSI 以内であることがわかりました。
これは、チャックとダイヤルの本体の両方にスイベル接続を備えた、私たちが試した中で最も用途の広いゲージでした.これにより、バルブステムの一方の端を簡単に取得でき、もう一方の端を読みやすい場所に配置できます。多くのダイヤルゲージと同様に、タイヤから取り外した後も読み取り値を保持し、非常に遅い場合はデフレーターとしても機能する空気圧リリーフバルブを備えています。ただし、これはリストの中で最大のタイヤゲージであるため、グローブボックスに詰め込むのははるかに不便です.顔を傷から保護するための巾着袋と、必要に応じてステッカーとデカールのパッケージが付属しています。 Rhino USA Heavy Duty Tire Pressure Gauge は、92% の優れた肯定的な評価と 4,600 件を超えるレビューを獲得しています。
編組金属ホースを受け取りましたが、Rhino USA は編組布で覆われたものに切り替えたことに注意してください。布は長期的によじれる可能性が低いためです.
Rhino USA は、すべての製品に対して手間のかからない無制限の生涯保証を提供しています。 Rhino の Web サイトにはフリーダイヤルのカスタマー サービス番号と電子メールがあり、カリフォルニア州ムリータのオフィスで顧客を歓迎しています。匿名で電話をかけたところ、誰かが最初の呼び出し音を拾い、私たちのすべての質問に答え、何も問題がなかったにもかかわらず、ゲージを無料で交換することを申し出ました.
エア ゲージに自分のお金を使ったとき、それはディルにありました。
多くのタイヤゲージは実際には同じ製品であり、同じオフショア工場で製造されていますが、名前が異なり、色が付けられている可能性があります。ディルは米国で独自に製造しており、重さがほぼ0.5ポンドであるという事実は、使い捨てのプラスチック片ではないことを示しています.まっすぐまたは 30° の角度で読み取るデュアル フット ゲージは、不便な場所に配置されたバルブに到達するのに非常に役立ちます。トラック タイヤ用に評価されており、プラスチック ゲージで 2 つの PSI 刻みで 20 ～ 120 PSI を読み取ります。それが唯一のプラスチック部分で、残りは固体の金属です。範囲の上限が必要ない場合は、5 PSI まで読み取れ、50 PSI で最高になる、より正確な鉛筆ゲージがあります。下の方にあるものの 1 つについては、私たちの選択を参照してください。
AutoGuideガレージには約半ダースのタイヤ空気圧ゲージがあり、ほとんどの日常的なニーズにはDillにたどり着きます。この金属の塊をつかむのは非常に満足のいくものであり、これ以上簡単に使用することはできません.ダイヤルゲージは鉛筆スタイルよりも正確で読みやすい傾向があるため、トップの座にはなりません.私たちの一番のおすすめは、組み込みのデフレーターが付属しており、他のテストでよく使用しますが、それがあなたに当てはまらない場合は、Dill 空気圧ゲージが生涯で唯一必要になる可能性があります.
このエア ゲージは、83% の肯定的な評価がありますが、26 件のレビューしかないため、通常、推奨事項に含める資格はありません。ただし、何千ものメカニクスについては言うまでもなく、これらに関する私たちの個人的な経験は、あなたが失望することはないと言っています.
Dill Air Controls Products は 1909 年以来、米国でタイヤ部品とゲージを製造しており、何らかの理由で 10 ドルのタイヤ エア ゲージのカスタマー サービスが必要な場合は、Dill の Web サイトに 800 番の番号があります (また、アクセスしたい場合は、道順を参照してください)。 ) ノースカロライナ州オックスフォードの本社。ファックス番号と Web フォームだけでなく、タイヤゲージには 60 日間の保証が付いています。
The Astro AI gauge has very bright illumination, but it can take several tries to get a reading.
The AstroAI Digital Tire Pressure Gauge is the best digital gauge we tested. The bright illumination and accurate readings make it better than other gauges in its price range. It features blue backlit LCD and matte finish grip. The best feature is a bright LED circling the chuck, which makes it easier to find the valve stem. It reads in 0.5 PSI increments, has has setting for 0-150 PSI, 0-10 BAR, 0-10 kgf/cm2, or 0-1000 KPA. It uses a single button for all its features, toggling on/off, and the unit of measurement. The device will automatically shut off after 30 to 40 seconds to save power. A non-replaceable battery* is included.
This gauge read within the rated 0.5 PSI of our other gauges and it was easy to see the display. But it sometimes took several tries to get it to take a reading, and it was easy to hit the power button and lose our measurement. The blue light is very bright, but we’d rather have white for the chuck flashlight, and red (or anything but blue) for the gauge for the sake of preserving our vision at night. This gauge has over 48,000 reviews and a very good 89% positive rating.
AstroAI offers a 30-day guarantee and one-year warranty on their product. They have a toll-free number, local California number, and customer support email on their site, along with easy-to-find user manuals. Customers report that warranty service is easy to use.
* You could pry it open and replace the batteries, but it takes one CR2032 and three LR44 button cell batteries, and there are some plastic tabs it’s easy to break. If you’re not a fan of disposable culture, be prepared to do some gluing or use small screws during reassembly.
Quality construction and simple operation make the TireTek gauge a solid choice.
Of all the gauges we tested, only TireTek lists the grade of ANSI B40.1 calibration, Grade B, which is the highest standard for consumer and commercial gauges. That means it’s rated for 3% accuracy, or ±1.2 PSI, from 15 to 45 PSI. Other gauges might be as accurate, and others in the AutoGuide Garage performed equally well, but without publishing the grading, you have no way of knowing. If it was as convenient to use as our top pick, it would be in the running for the #1 spot on our list.
Like most mechanical dial tire pressure gauges, it holds pressure and it’s reading until you release a valve. This lets you measure on the tire, but without the need to get your face down close to the valve stem. The two-inch face is surrounded by the typical rubber drop guard, and the rest of the construction is steel and plated brass. The face glows in the dark, but you need to shine a bright light on it first, so it won’t work straight out of the glovebox. As 45-degree swiveling 5 mm chuck is more usable than a straight one, but it can be hard to get into some tight wheels. If you don’t have the room for our top pick, this is a good choice for accuracy and dependability, and it has an excellent 92% positive rating from over 5,500 reviews.
TireTek gauges have a 12 month warranty, which you can extend to a lifetime satisfaction warranty by registering your product on the TireTek site. There is a web form and customer service email, but no phone number.
Accutire has a great reputation but some usability issues.
Accutire makes a classic and well known digital tire gauge, used by thousands of people for years. But there have been a number of running changes to the MS-4021B model that make it hard to know what you’re getting. It has a very grippy butyl rubber handle that makes it easy to hold onto in wet or greasy conditions. The gauge reads in PSI only, from 5-150 PSI in 0.5 increments and is said to be accurate within 0.5 PSI. Accutire doesn’t list any standard for this claim, but they’re well known as an accurate gauge.
It uses a fixed, 45° angled head, which would generally be useful for a fixed head design, if it were easier to know if you were actually getting a reading. It turns on automatically when it detects pressure from the valve stem, but we found it seldom measured on the first try. We had to remove it, then press it down again and hold it until it displayed a pressure reading. Then, the dimly lit display would turn off after 10 seconds, and it’s not bright enough to read in direct sunlight. Previous versions have looked different, and some have had an on-off button. We’re not sure if our all-black version, as opposed to the typical black and gold, is a different model, but it has the same MS-4021B model number it’s had since 2014. Nevertheless, it has a good 84% positive rating and over 5,600 reviews.
The three LR44 button cell batteries are replaceable, but you need a JIS #1 (or #1 Phillips) bit for the tiny screw. Many common problems with the gauge can be solved by resetting it by removing and replacing the batteries. Four extra included valve stem caps are a nice touch, but there’s no way to store them.
Accutire is a brand of Measurement, Limited, Inc., of Newport News, Virginia, which make tire pressure gauges for Michelin, among many other products. Accutire more or less has a website, where with a little work you can find an email address, local Virginia phone number, and web form. We were sent directly to voicemail when we called. There is a five-year warranty on the MS-4021B tire pressure gauge, but Accutire requires you return defective gauges at your expense, which is probably not worth it for a product in this price range.
JACO is a top-quality product but falls down the list with a lack of customer service.
JACO produces a high-quality mechanical dial gauge similar to Rhino, and at about the same price. The ElitePro tire pressure gauge is calibrated to ANSI B40.1 standard and promises ±1.5% accuracy without having to rely on batteries. Manufactured with premium heavy duty components, the gauge is surrounded by a rugged, gear-style guard and has a flexible 10 inch rubberized no-leak air hose. There is a built-in bleeder valve to reduce pressure in overinflated tires, while the 360-degree chuck makes it easy to access your valve stems.
The two-inch dial reads up to 100 PSI and glows in the dark, while readings are locked in place until the pressure reset button is pushed. We like the high-contrast, two-inch dial for readability. It has a terrific 93% positive rating from 5,700 reviews.
JACO Superior Products offers a 30 day money back satisfaction guarantee and lifetime warranty on their product ElitePro gauge. When we called them, there was a message saying JACO didn’t have phone support “this week,” but we don’t know how old the message was. We’ll check back later to see if that changes, but for now there is just a web form and email on the site. This keeps the ElitePro out of contention for a top spot on our list, even if functionally it’s very competitive.
It’s fair to call the Milton Pencil Gauge an automotive icon.
If you like cars, this is one of those tools that you should own at least once in your life. Milton has sold untold millions of their classic pencil gauge over the years, and with good reason. This US-made, plated brass single chuck head pencil tire pressure gauge is just about the cheapest way to get the job done reliably.
This old standard measures 5-50 PSI in 1 PSI increments on two faces of the gauge, and 40-350 kPa in 10 kPa increments on the other. Milton Industries doesn’t state how accurate the gauge is, but ±1 PSI is probably a safe bet, which puts it in the middle for accuracy. The head is at a good angle for taking readings, shallower than the 45° on most other gauges. You’ll need to check your measurement two or three times to be sure you got full pressure into the gauge, until you get used to it. The markings are legible but small, and exposure to any solvent, like brake cleaner, will remove them. The Milton S-291 Passenger Tire Gauge has a very good 90% positive rating across almost 4,500 reviews.
We wouldn’t expect most people to feel compelled to make a warranty claim for a tire gauge you can pick up almost anywhere for under $10, but Milton Industries has a 15-day money back satisfaction guarantee, and one-year limited warranty on defects. You can submit the warranty claim through a web form on the Milton site, and there is a toll-free number and other web forms on the Milton site. You can also register your gauge with Milton, if you wish.
This wouldn’t be a “Best” list without a Longacre gauge.
You aren’t going to see a Longacre in most garages, or even tire shops, but if you need the most accurate and legible tire gauge this side of the aerospace industry, there aren’t too many other choices. Where you will find them is in places that build and race cars.
This massive USA-made gauge sports a 4.5 inch face, and is marked in 0.5 PSI increments from 0-60, which makes sense when you consider its lab-quality 0.5% (0.25 PSI) accuracy for the entire range of the gauge, or ASME B40.1 Grade 2A. It has a high grade 17-inch hose and comes with both a straight 45° swivel angle chuck and a swivel ball chuck, not to mention a padded metal carrying case. It also has dual pressure release buttons to make it useful for controlled deflating.
This is complete overkill for any commuter car and you could buy a case of any of the other gauges on our list for less than the Longacre Pro Precision, but it’s vital equipment for places like race shops where every half a PSI matters. You’re also not going to find many reviews for a product like this, although those it has are 100% positive. Their products lower down the product stack are all in the 92-95% positive range, with thousands of reviews.
We’re not sure why a premium product like this only has a one-year warranty, other than they make expect them to have hard use trackside. They do offer a repair service and are very easy to contact, with multiple toll-free and local Indiana phone numbers, emails, and web forms on their site. They answered our call on the first ring, and answered our questions immediately.
Sometimes less pressure is good, as long as it’s the right amount. Photo credit:David Traver Adolphus / AutoGuide
Often overlooked and even sometimes forgotten, your car’s tire pressure is an important factor in making sure your car runs optimally. These days, most modern vehicles come equipped with Tire Pressure Monitoring Systems (TPMS), which takes the guesswork out of wondering whether your car’s tire pressure is low or not. But what if your car doesn’t have TPMS? And if it does, are there still things you should know?
You may be surprised by how great of an effect your car’s tire pressure has on your vehicle’s performance. In fact, if you’ve noticed that your gas mileage has gone down a few MPG, it’s likely attributed to your car’s tires.
This tire is not properly inflated. Photo credit:David Traver Adolphus / AutoGuide
Even if your car is equipped with TPMS, you will want to know the recommended tire pressure for your specific vehicle. Typically, there is a sticker found inside the driver’s side door that will list the recommended tire pressure. This figure is normally indicated in PSI, which stands for pounds per square inch of air. In addition, your tire’s maximum air pressure will be labeled on the tire’s sidewall. That figure is the maximum PSI the tire can safely hold. In other words, don’t inflate your tires beyond the number found on the sidewall.
If you are not able to locate a sticker on the inside of your driver’s side door, refer to the owner’s manual to determine the recommended tire pressure for your car.
Keep in mind that the recommended tire pressure values could be different between your front and rear tires. Make sure you’re checking both front and rear values when you’re determining whether your tires are properly inflated.
Because it didn’t have the weight of a car on it, this tire looked fine. Photo credit:David Traver Adolphus / AutoGuide
There’s a reason why vehicles have recommended tire pressures. Proper inflation of your car’s tires not only ensures it’s comfortable to drive and ride in, but it can also affect your fuel economy. More importantly, they ensure your tires are wearing out uniformly, extending the life of your tires.
Overinflating or underinflating your tires could have adverse effects on its performance. Not only do underinflated tires appear flatter, they have increased surface contact with the road. If driven over a long period of time, that contact can result in premature tire wear. Underinflation also has a direct effect on the car’s fuel economy.
Overinflating your tires with too much air can cause increased rigidity and stiffness, resulting in a harsher ride. Contact with the road is typically increased around the center area of the tire when it is overinflated, causing additional wear in the center. If you notice the sides or outer sections of your car’s tires are less worn out than the center, it’s a good chance they’re overinflated.
Checking your car’s tire pressure is a fairly straightforward and simple task. The easiest method is to use a tire pressure gauge that you can purchase online or at any automotive parts store for cheap. It’s normally recommended to check your car’s tire pressure levels when the tires are cold, or after the vehicle has been parked for at least three hours. Since friction causes heat, and heat increases tire pressure, doing a check after driving will likely give you an inaccurate figure. The recommended tire pressures you find in either the decal inside your driver’s side door or in your owner’s manual refers to the tire pressure before you start driving.
Using the tire pressure gauge, remove your valve stem cap and simply place the gauge on the stem with some pressure. A number will appear on the gauge, and it never hurts to check it two or even three times to make sure you have an accurate reading. Once you’ve checked the tire pressure on all four tires, make sure to replace the valve stem cap.
Avoid gauges like this one that don’t hold a reading when you remove them from the valve stem. Photo credit:David Traver Adolphus / AutoGuide.com
If you don’t own a tire gauge, nearly all public air compressors will have an integrated tire gauge. More modern units at gas stations may have digital readouts to show your tire pressure. If your tire is overinflated, you’ll want to let some air out to get it back to the optimal PSI range. Make sure to check it periodically while you’re letting air out, so you don’t end up underinflating your tires.
With tire pressure monitoring (TPMS) required in new vehicles, many people don’t think about tire pressure unless the light illuminates. Or maybe you go with the “eye test,” where you just look and gauge whether your tire is flat or not. But a TMPS light won’t go on until your tires are about 20% low, far below the threshold to cost you gas money and wear out your tires.
Even in modern vehicles, you should check your tires (and oil!) at least once a week. It only takes a couple of minutes and is an easy way to stop problems before they start, and get to know your car better. Every time you drive, you should take 11 seconds to walk around your vehicle, especially if you’re taking a long trip. Then you can whip out your handy gauge if something looks off.
If you keep a tire gauge in your car, why not just do a quick check while you’re gassing up? It’s something productive to do with that time and could go a long way in making sure your tires last as long as they should.
Tire gauges are easy to use, regardless of whether they’re digital, dial, or pencil. Pencil tire gauges are typically compact and are a long thin tube with a chuck on one end to connect to the valve stem of your tire. As soon as you press it on and it gets air pressure from the tire, a plastic rod will extend from the gauge to show your PSI. If you’re using a pencil tire gauge, we recommended checking the tire pressure two or three times to make sure you have an accurate reading. When you’re done, just push the rod back in. It should go in with almost no resistance, which also makes it easy to change by accident before you can look at it. Some pencil tire gauges will also allow you to let air out of your tire by putting the opposite end into the valve stem.
While they do cost a bit more than a conventional tire gauge, digital tire gauges are more reading and are easier to use. Some of them turn on automatically, while others have an on-off or multifunction button. Then, all you have to do is turn on the gauge and place it on the valve stem to get a PSI reading. But since they are digital, they’ll require batteries so always keep a spare set handy. If you’re not using it every day, and it isn’t alternately baking and freezing in your car, you should get at least three to five years out of a set of button batteries. A backlit screen is very handy for use under a dark car or at night, but they can wash out in sunlight.
We like dial gauges for everyday use. You know when you have a reading, because the indicator needle jumps when the gauge is pressurized. They have several advantages. Most of them hold pressure until you release it, so you have plenty of time to look at the number. They also tend to be large and easy to read, with two inch or larger dials. Many are glow in the dark and they don’t need batteries, but they need light first if you want them to glow. Dial gauges can be very accurate and there’s a calibration standard—look for those that say they meet ANSI B40.1, which is the highest standard of accuracy for consumer products.
Wed don’t recommend driving your car for an extended period of time with low tire pressure. If your vehicle is equipped with TPMS and the light is on, you’ll want to address the issue as soon as possible. Low tire pressure not only results in uneven wear on the tire, it increases the risk of getting a flat or even a blowout.
April 6, 2022:Updated introduction, minor corrections.
March 14, 2022:Updated information for Rhino USA Heavy Duty Tire Pressure Gauge.
March 11, 2022:Updated FAQs and photos. Updated information for JACO ElitePro and Milton S-921 tire pressure gauges.
March 10, 2022:Added hands-on review and photo of Rhino USA Heavy Duty Tire Pressure Gauge. Awarded “Best Digital” to AstroAI Digital Tire Pressure Gauge and updated review and photo based on testing. Moved TireTek gauge to 4th place and added testing results and photo. Moved Accutire to 5th place and added testing results and photo. Updated FAQs. Removed Slime Digital Tire Gauge, added Longacre 52-52000.
March 9, 2022:Updated introduction and added hands-on review and photos of Dill dual-foot pencil gauge.
January 27, 2027:Removed unavailable Tekton gauge, added Dill dual-foot pencil gauge.
December 23, 2021:Removed discontinued Tacklife and McLintech brands.
June 15, 2021:Updated with a promoted product recommendation.
June 7, 2021:Updated with a new image for the JACO ElitePro Tire Pressure Gauge.