Cast Iron Machined 45lb And Calibrated Solid Steel Weight Plates

Name: Cast Iron Machined 45lb And Calibrated Solid Steel Weight Plates
Brand: Weight It Out
Rating: 4.78 (3 reviews)

Buy Now · $534.99

Weight It Out’s Cast Iron Machined 45lb And Calibrated Solid Steel Weight Plate Set pairs the brand’s ultra-thin, American-made 45lb cast iron plates with calibrated solid steel plates (2.5, 5, 10, and 25lb) for precise microloading – sold as a complete 175lb set (one pair each of 2.5/5/10/25lb steel plus one pair 45lb cast iron), with 265lb and 355lb set options adding extra pairs of 45s. The 45lb plates are machined to 17.72” diameter and just 0.75” thick, among the thinnest cast iron plates on the market, letting lifters load more weight onto short-sleeve bars and store far more plate in the same rack space. Cast iron plates are manufactured in the USA to within +/-1% weight tolerance; the steel plates are calibrated to +/-0.25%. Buyers choose steel finish (Gold or Silver) and 45lb coating (Clear or Black), with custom engraving (up to 20 characters) available at no extra cost. Independent reviewers consistently praise the accuracy, storage density, and rounded-edge/ grip-handle design, while flagging that the thin profile needs a tight-fitting collar to avoid rocking on the bar, and that pricing runs at a premium versus standard cast iron.

Buying guide

Best Weight Plates for Your Home Gym — July 2026 Bumper Plates or Iron Plates? How to Pick Your First Set — July 2026 Do You Need Calibrated or Competition Plates? — July 2026 How Much Do Weight Plates Cost Per Pound? — July 2026 What Weight Set Should a Beginner Buy? — July 2026 Will Dropping Weights Damage Your Floor? — July 2026

Production	6-week batch production cycles; Clear-coat 45 lb plates add 7-14 days lead time
Sleeve fit	Standard 2" Olympic bore
Manufacturer	Weight It Out
Customization	Free custom engraving, up to 20 characters
Finish options	Gold or Silver steel plates; Clear or Black-coated 45 lb cast iron plates
Set configuration	175 lb set: pair each of 2.5/5/10/25 lb steel plates + 1 pair 45 lb cast iron (265 lb and 355 lb sets add extra 45 lb pairs)
Cast iron material	100% American-made cast iron
Cast iron tolerance	+/-1% weight variance
45lb plate dimensions	17.72" (450mm) diameter x 0.75" thick
Steel plate tolerance	+/-0.25% calibrated weight tolerance

What is a Weight Plate?

What weight plates are

Weight plates load your barbell — but “plate” covers two very different tools. Bumper plates are rubber discs around a steel hub, all the same ~450mm diameter, built to be dropped from overhead without damaging your floor or bar; they’re the default for Olympic lifting and CrossFit. Iron/steel plates are denser and thinner per pound, cheaper, and quieter to load, but most aren’t made to be dropped — better for slow, controlled powerlifting-style work.

What actually matters

Bumper vs. iron. Buy bumpers if the bar might hit the floor; iron (or rubber-coated iron) for controlled lifts and compact loading.
Weight tolerance. How far a plate strays from its stated weight (±1% is tight, ±3% loose). It barely matters for general training but adds up if you chase a specific total — which is why serious lifters add small change / fractional plates.
Collar fit & bounce. The center hole should fit your bar’s sleeve snugly; rubber durometer (around 88 Shore A) controls how “dead” a dropped plate lands.
Coating & set composition. Virgin rubber holds up and smells less than recycled crumb rubber; plan a starting set (usually a pair each of 45/25/10/5 lb plus change plates) around the lifts you actually do.

Who it’s for

Every barbell gym needs plates. Most home lifters should start with a bumper set, then add iron, change, or specialty plates as a second purchase once they know what their training is missing.

How it compares

	Cast Iron Machined 45lb And Calibrated Solid Steel Weight Plates	Black Training LB Plates	Micro Gainz	Thor Barbell Vintage Weight Plates
GymRadar rating	4.78/5	4.78/5	4.78/5	4.8/5
Price	$534.99	$225.00	$29.99
Production	6-week batch production cycles; Clear-coat 45 lb plates add 7-14 days lead time
Sleeve fit	Standard 2" Olympic bore
Manufacturer	Weight It Out		Micro Gainz
Customization	Free custom engraving, up to 20 characters
Finish options	Gold or Silver steel plates; Clear or Black-coated 45 lb cast iron plates
Set configuration	175 lb set: pair each of 2.5/5/10/25 lb steel plates + 1 pair 45 lb cast iron (265 lb and 355 lb sets add extra 45 lb pairs)
Cast iron material	100% American-made cast iron
Cast iron tolerance	+/-1% weight variance
45lb plate dimensions	17.72" (450mm) diameter x 0.75" thick
Steel plate tolerance	+/-0.25% calibrated weight tolerance

4.8/5 · 3 GymRadar reviews

Reviews by source

Expert	4.78/5	3 reviews
Youtube	4.5/5	4 reviews

Weight It Out’s Cast Iron Machined 45lb And Calibrated Solid Steel Weight Plate Set pairs the brand’s signature ultra-thin, American-made 45lb cast iron plates with calibrated solid steel plates (2.5-25lb) for microloading, sold as complete 175/265/355lb sets. Its standout dimension is functionality: at 0.75” thick and 17.72” diameter, the 45s are among the thinnest cast iron plates on the market, letting lifters load far more weight onto short-sleeve bars and store far more plate in the same rack space – reviewers across Garage Gym Reviews, Shredded Dad, and multiple YouTube channels independently confirm the plates run true to their claimed +/-1% (cast iron) and +/-0.25% (steel) tolerances. Its weakest dimension is build quality in one specific respect: the same thinness that makes these plates space-efficient also makes them prone to rocking or sliding on the bar without a tight-fitting collar, a tradeoff every independent reviewer calls out. Expect to pay a premium versus standard cast iron – reviewers consistently note these cost more than thicker, less refined competitors.

+Functionality: 0.75" thick / 17.72" diameter 45lb plates load far more weight onto short-sleeve bars than standard cast iron (Weight It Out; Kurtis YouTube review)
+Functionality: space-efficient thin design lets lifters store roughly 3x as many plates in the same rack footprint (Weight It Out)
+Build quality: American-made cast iron, machined and weighed to confirm accuracy -- one reviewer's own scale test measured a 45lb plate at 44.6 lbs, within the claimed +/-1% tolerance (Shredded Dad)
+Build quality: current-generation plates have rounded, beveled edges (an improvement over the original design's sharp edge) and comfortable built-in grip handles (Kurtis YouTube review)
+Versatility: steel plates calibrated to +/-0.25% tolerance enable precise microloading alongside the cast iron 45s, and finish/color/custom-engraving options let buyers match their setup (Weight It Out; Kurtis YouTube review)

−Build quality: thin plates are more prone to rocking or sliding on the bar than thicker plates and need a tight-fitting collar or retention clamp, especially when deadlifting stacked 45s (Garage Gym Reviews; Shredded Dad; Kurtis YouTube review)
−Value: priced at a premium versus standard, thicker cast iron competitors (Garage Gym Reviews; Kurtis YouTube review)
−Build quality: thinner plates reduce barbell whip versus thicker plates, noticeable to some lifters on deadlift-style bars (Kurtis YouTube review)
−Build quality: painted/coated finishes (especially lighter colors like white) show more visible chipping with use over time (Hybrid Resistance YouTube review)
−Durability: limited long-term ownership data beyond the reviewers cited here -- the product line and its handle/edge redesign are relatively recent

$534.99

Buy Now