Barbell buying guide: which bar fits your lifting, and how to lift safely at home
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- 20 kg multipurpose Olympic barbell, 28.5 mm shaft. Best for: Most home gyms doing squats, presses, deadlifts and rows. See options on Amazon
- 15 kg women's Olympic barbell, 25 mm shaft. Best for: Smaller hands and lifters starting with lighter loads. See options on Amazon
- 45 lb power bar, 29 mm shaft with center knurl. Best for: Lifters focused on heavy squat, bench press and deadlift. See options on Amazon
- Lock-jaw Olympic barbell collars. Best for: Anyone loading plates on a barbell. See options on Amazon
- Power rack with safety arms. Best for: Squatting and bench pressing without a spotter. See options on Amazon
What a barbell is and why the type matters
A barbell has a long knurled shaft you hold and two smooth sleeves that carry the plates. The sleeves rotate on bushings or bearings so the plates can spin as the bar moves. Mayo Clinic advises strength training at least two times a week and working all of your major muscles. A barbell is one way to load big lifts like the squat, deadlift and press that do this.
The bar you choose changes how it feels in your hands and on your back. The main differences are weight, shaft diameter, knurling and how stiff the bar is.
Types of barbell compared
| Bar type | Example specs (Rogue) | Fits | Trade-off |
|---|---|---|---|
| Multipurpose Olympic bar | 20 kg (44 lb), 28.5 mm shaft, no center knurl, bronze bushings | Squats, presses, deadlifts and some Olympic lifts | Not specialized for either powerlifting or Olympic lifting |
| Women's Olympic bar | 15 kg (33 lb), 25 mm shaft, no center knurl | Smaller hands, lighter starting load | Can feel thin in large hands |
| Power bar | 45 lb, 29 mm shaft, deep knurl, center knurl, very stiff | Heavy squat, bench press and deadlift | Coarse knurl and center knurl can irritate skin on cleans and high-rep sets |
Rogue says its 15 kg Bella Bar is made for female athletes, and that many male athletes with smaller hands also prefer the 25 mm shaft. It describes its power bar as engineered for the squat, bench press and deadlift, with a center knurl that helps the bar stick to your back in heavy squats.
Specs to check before you buy
- Weight. Know what the empty bar weighs so you can load it correctly: 20 kg and 45 lb bars are common men's bars; 15 kg is the common women's bar.
- Shaft diameter. Rogue lists 28.5 mm as the multipurpose standard, 29 mm as standard for powerlifting and 25 mm as the women's standard. Thinner is easier to grip.
- Knurl. Rogue describes a medium knurl as firm enough for heavy pulls but not abrasive for high-rep sets. A center knurl helps heavy back squats but can rub the neck on front squats and cleans.
- Rack fit. Rogue says the 52 inch shaft between the sleeves on its Ohio Bar lets it rack on all standard-width power racks. Check your rack's width before buying.
- Strength. Makers list tensile strength in PSI; the Ohio Bar is rated at 190,000 PSI.
- Finish. Coatings such as zinc resist rust. Bare steel feels grippier but needs more care.
- Plates. Olympic bars take plates with the larger Olympic center hole. Match bar and weight plates.
Barbell safety at home
A national study from Nationwide Children's Hospital found more than 970,000 weight training injuries were treated in US emergency departments between 1990 and 2007. Free weights were involved in 90 percent, and the most common cause was weights dropping on a person, at 65 percent. Sprains and strains were the most frequent injuries.
That shapes what to buy and how to lift:
- Use collars on every loaded set so plates cannot slide off.
- Squat and bench inside a power rack or with a squat stand set up with safety arms at the right height, so a failed rep lands on steel, not on you.
- Get proper instruction on technique; the study's authors recommend it for all ages, plus trained supervision for young people.
- Follow Mayo Clinic's basics: warm up for five to 10 minutes, start with a weight you can lift comfortably 12 to 15 times, breathe out as you lift, do not hold your breath, and stop if an exercise causes pain.
- Wear shoes with good traction. Mayo Clinic notes they help keep you from slipping.
Care
Rogue suggests brushing the knurl after use with a nylon bristle brush to clear chalk and sweat, and an occasional light coat of 3-in-1 oil brushed in and wiped dry. A drop of oil where the sleeve meets the shaft can help if the sleeves stop spinning freely. It also recommends plastic-lined J-cups so metal-on-metal contact does not wear the finish.
What to look for when you buy
20 kg multipurpose Olympic barbell, 28.5 mm shaft
Best for: Most home gyms doing squats, presses, deadlifts and rows
Rogue calls 28.5 mm the multipurpose standard. A bar with dual knurl marks and no center knurl handles both slow lifts and cleans.
Watch out: Check the shaft length between sleeves fits your rack, and buy collars with it.
See options on Amazon15 kg women's Olympic barbell, 25 mm shaft
Best for: Smaller hands and lifters starting with lighter loads
The 25 mm shaft is easier to close your hand around, and Rogue notes many lifters with smaller hands prefer it.
Watch out: Do not confuse it with a 20 kg bar when counting the load.
See options on Amazon45 lb power bar, 29 mm shaft with center knurl
Best for: Lifters focused on heavy squat, bench press and deadlift
Rogue describes its power bar as very stiff with a deep knurl and a center knurl that grips the back in heavy squats.
Watch out: The coarse knurl can be rough on hands and the neck for cleans and high-rep work.
See options on AmazonLock-jaw Olympic barbell collars
Best for: Anyone loading plates on a barbell
Weights dropping on a person were the most common cause of weight training injuries in the Nationwide Children's study. Collars stop plates from sliding off.
Watch out: Check they fit Olympic sleeves before you buy.
See options on AmazonPower rack with safety arms
Best for: Squatting and bench pressing without a spotter
Safety arms set just below the bottom of your lift catch a missed rep, which matters when free weights drive most injuries.
Watch out: Measure ceiling height and floor space first, and anchor the rack as the maker directs.
See options on AmazonQuestions people ask
- How much does a barbell weigh?
- A standard men's Olympic bar is 20 kg (44 lb), many power bars are 45 lb, and a women's Olympic bar is 15 kg (33 lb). Check the maker's stated weight for your bar.
- What is the difference between an Olympic barbell and a power bar?
- A multipurpose Olympic bar usually has a 28.5 mm shaft and no center knurl. A power bar is stiffer, often 29 mm, with a deeper knurl and a center knurl for heavy squats.
- Can I bench press with a barbell at home alone?
- Only with safety arms or spotter arms set just below your chest. Weights dropping on people are the most common cause of weight training injuries.
- What does barbell shaft diameter change?
- How the bar fits your hand. Rogue lists 25 mm as the women's standard, 28.5 mm as multipurpose and 29 mm as the powerlifting standard.
- How often should I lift with a barbell?
- Mayo Clinic says to strength train at least two times a week and to avoid working the same muscles two days in a row.
Sources
- Product Guide: The Rogue Ohio Bar, Black Zinc (support.roguefitness.com), Rogue Fitness (maker)
- Product Guide: The Bella Bar 2.0, Black Zinc (support.roguefitness.com), Rogue Fitness (maker)
- Product Guide: Rogue 45LB Ohio Power Bar, Black Zinc (support.roguefitness.com), Rogue Fitness (maker)
- Weight training: Do's and don'ts of proper technique (sportsmedicine.mayoclinic.org), Mayo Clinic Orthopedics and Sports Medicine
- New National Study Examines Weight Training-Related Injuries (nationwidechildrens.org), Nationwide Children's Hospital