Every number you will meet on a barbell listing, what it actually means, and whether it should change your mind. Most of them should not. Three or four of them should settle the purchase.
Barbell listings are dense with numbers, and the industry has never standardised the vocabulary, so two makers can describe the same knurl in completely different words. What follows is every specification you will encounter, in the order it usually appears, with an honest note on how much it matters.
If you read only four entries, read shaft diameter, rotation system, load rating and finish. Those four decide almost every purchase.
20kg for a men’s bar, 15kg for a women’s, 25kg for a squat bar, 5kg to 10kg for a technique bar. Worth checking rather than assuming: a squat bar is 5kg heavier than the bar every programme assumes, and competition collars add 2.5kg each on top.
The single most informative number on the listing, because it tells you what the bar is for. 25mm women’s, 27mm deadlift, 28mm weightlifting, 28.5mm multipurpose, 29mm powerlifting, 32–35mm squat. Stiffness rises steeply with diameter, so one millimetre is a real difference.
50mm on every Olympic bar. This is what the word "Olympic" means in this context. A "standard" bar has 25mm sleeves and the plates are not interchangeable in either direction.
How much plate will physically fit on each end, typically 400–430mm on a 7ft bar and as little as 220mm on a 6ft bar. Check it against the plates you own: 450mm bumper plates are thick for their weight and fill a sleeve far faster than thin calibrated steel.
A measure of the steel, in PSI. On bars sold in Britain the useful range is roughly 180,000 to 240,000 PSI. Higher is better all else equal. It is one number among several, and a maker who publishes it alongside a load rating is being more useful than one who publishes a big PSI figure alone.
What the maker has tested the finished bar to, in kilos. Ranges hugely: 180kg on an entry-level bar, 680kg on most mid-range bars, above 907kg on a commercial weightlifting bar. A rating is a limit, not a target — leave real headroom above your best lifts.
The cross-hatched grip pattern cut into the shaft. Makers describe it by depth and shape: 1.0 standard, 1.2 moderate, 1.5 aggressive; volcano, mountain, diamond, passive-aggressive. Deeper grips better and chews your hands up faster. Volcano patterns are a middle ground — flat-topped peaks that hold without biting.
A patch of knurling in the middle of the shaft. It stops the bar sliding down your back under a heavy squat, and it grates on your sternum during a bench press and your throat in a front rack. Power bars nearly always have one; weightlifting and multipurpose bars often do not. A "passive" centre knurl is a deliberate halfway house.
The smooth rings machined into the shaft that mark legal grip widths. Powerlifting rings sit 810mm apart; weightlifting rings sit 910mm apart. A dual-marked bar has both, which is four rings and takes a session or two to stop noticing.
How much the bar bends under load and keeps bending. Desirable on a deadlift bar, where the flex lets you pull the slack out before the plates move. A liability under a squat or a bench press, where a bar still oscillating is a bar fighting you. Makers rate it low, medium or high.
Bronze bushings for slow, controlled rotation; needle bearings for fast, free rotation; sometimes both in one sleeve. Bearings matter enormously for the snatch and clean and jerk and are a slight drawback everywhere else. Bearing counts are published — five per sleeve, eight per bar, ten per bar — though sleeve sealing matters at least as much.
How close the bar is to its stated weight. A training bar is typically ±1%, which is 200g on a 20kg bar. A calibrated competition bar is ±50g or tighter, and Eleiko quote +20g / −10g. It matters if a record is being ratified and not at all in your garage.
Bare steel and black oxide grip best and rust if neglected. Zinc is cheap and wears. Hard chrome is durable and the default for shared gyms. Stainless never rusts and costs more. Cerakote is a baked ceramic coating that resists corrosion well and sits slightly on top of the knurl. In a damp British garage this is a functional decision, not a cosmetic one.
Rarely published, which makes it worth noticing when it is. Bulldog Gear quote ±0.1mm on some bars. A bar machined straight and kept within its rating stays straight; a bar loaded past its rating does not, and a bent bar is scrap.
IWF for weightlifting, IPF for powerlifting, WPPO for para powerlifting. It means the federation has tested and approved that exact bar for sanctioned competition. It is expensive and buys you nothing outside competition. Read the wording carefully: "built to IWF specification" is not "IWF certified", and the honest makers say which they mean.
Rogue’s own stiffness scale, running roughly F6-R to F10-R, where a higher number is a stiffer bar. It is a useful shorthand within Rogue’s range and not comparable to anything outside it, because no other maker uses it.
A listing with no tensile figure and no load rating is not withholding information to keep things simple. It is telling you the seller does not know what the bar is made of, which means nobody has tested it. That is the specification.
Certification means a federation has tested and approved that exact bar for sanctioned competition. Building to a specification means the dimensions match. Both are perfectly respectable; only one of them is a certificate.
The makers worth trusting say which they mean, unprompted. Strength Shop write on their weightlifting bar listing that it follows the relevant IWF specification but is not IWF-certified. That one sentence tells you more about a seller than any amount of marketing copy.
If the listing will not tell you what the steel is, the steel is the thing it is not telling you about.
Every bar on this site publishes a tensile figure or a load rating. Three UK sellers were left out because they publish neither.Mostly about which numbers are being used to impress you rather than inform you.
All else equal, yes — but all else is rarely equal. A 240,000 PSI bar with cheap sleeves and a loose straightness tolerance is not better than a 190,000 PSI bar machined properly. Tensile strength tells you about the shaft steel and nothing about the sleeve, the bearings, the knurl or the finish. Read it alongside the load rating, not instead of it.
Tensile strength is a property of the steel; whip is a property of the finished bar. Whip comes mostly from shaft diameter and the span between the sleeves — a 27mm bar with 56 inches between the sleeves whips a great deal whatever the steel is. Good steel determines whether that flex springs back cleanly and predictably, which is why high-grade steel matters most on bars designed to bend.
Because there is no standard, and every maker has invented its own vocabulary. Eleiko quote a number (1.0, 1.2, 1.5). Mirafit say medium volcano or aggressive mountain. Bulldog say passive-aggressive. Rogue describe theirs as deep and coarse. The numbers are depth in millimetres, roughly, and the names describe the shape of the peaks. Treat them as a rough guide, and expect to need a session to settle on any new bar.
A knurl cut so the peaks are flattened into small rings rather than left as sharp points — they look like tiny volcanoes under a magnifier. The result grips well without tearing skin, which is why it is common on multipurpose bars where someone might do fifty reps rather than one.
Up to a point. More bearings spread the load and generally spin smoother, so ten per bar is usually nicer than four. But how well the sleeve is sealed against chalk and dust matters just as much to how it spins in two years, and that rarely appears on a spec sheet. Treat bearing count as one signal of intent rather than a score.
How the sleeve is held on. A snap ring is a sprung clip sitting in a groove, and it is simpler and tougher than the bolt-and-end-cap alternative, at the cost of being harder to take apart for servicing. Rogue use it on the Ohio Power Bar. For most owners it is invisible either way.
Usually because the bar is a generic import they have put a logo on and they do not know. That is the most useful thing a listing can tell you. Every bar on this site publishes at least a tensile figure or a load rating, and three UK sellers were left off entirely because they publish neither.
The four decisions that settle it: what you lift, how thick the shaft is, bushings or bearings, and how much steel you actually need.
Read the guide →
Ceiling height, bar length, how damp your garage is, and why the finish matters more at home than it does in a commercial gym.
Read the guide →
Buying in quantity: load ratings, warranty terms, what gets dropped, replaceable sleeves, and how many bars of each type a floor actually needs.
Read the guide →