Side-by-Side Comparison
Weightlifting & Strength Standards
Olympic Bumper Plate Colors & Dimensions vs. Weight Plate & Collar Diameters
Comparing 2 standards across 14 specifications. 14 key differences identified.
Comparing:
Olympic Bumper Plate Colors & Dimensions
Weight Plate & Collar Diameters
Competition bumper plates are globally standardized by the International Weightlifting Federation (IWF) into an exact 450 mm (17.72 in) outer diameter and universal color-coded weight designations: Red (25 kg / 55 lb), Blue (20 kg / 45 lb), Yellow (15 kg / 33 lb), and Green (10 kg / 22 lb).
Weightlifting plate center bores and barbell loading sleeves are divided into Standard 1-Inch (25.4 mm) and Olympic 2-Inch (50.8 mm) systems, requiring precision clearance tolerances (0.4–0.8 mm) and locking collars (spring clips, lock-jaw clamps, IWF competition spinlock collars) to prevent shifting under dynamic acceleration.
Specification Comparison Table
14 Parameters| Parameter / Spec | ||
|---|---|---|
|
Governing Standards
|
IWF (International Weightlifting Federation) / IPF / USAW Rules | ASTM F2276 / ISO 20957 (Stationary Training Equipment) / IWF Standards |
|
Standard Outer Diameter
|
450.0 mm ± 1.0 mm (17.72 in) across all competition bumper plate weights | — |
|
Center Collar Bore Diameter
|
50.4 mm to 50.8 mm (precision fit for 50 mm Olympic barbell sleeves) | — |
|
Red Plate (IWF 25 kg / US 55 lb)
|
Thickness: ~60–65 mm | Solid Red | Heaviest standard bumper plate | — |
|
Blue Plate (IWF 20 kg / US 45 lb)
|
Thickness: ~50–55 mm | Solid Blue | Universal benchmark weight | — |
|
Yellow Plate (IWF 15 kg / US 35 lb)
|
Thickness: ~40–45 mm | Solid Yellow | — |
|
Green Plate (IWF 10 kg / US 25 lb)
|
Thickness: ~30–35 mm | Solid Green | Minimum diameter plate safe to drop alone | — |
|
Change Plate Colors
|
5 kg (White), 2.5 kg (Red), 2.0 kg (Blue), 1.5 kg (Yellow), 1.0 kg (Green), 0.5 kg (White) | — |
|
Standard Plate Center Hole
|
— | 1.00 inch to 1.06 inch (25.4 mm to 27.0 mm) | Home fitness & vintage barbells |
|
Olympic Plate Center Hole
|
— | 50.4 mm to 50.8 mm (1.984 to 2.000 in) | Commercial gym & competitive standard |
|
Olympic Sleeve Diameter
|
— | 49.8 mm to 50.0 mm (provides 0.4–0.8 mm slide-on clearance tolerance) |
|
IWF Competition Collars
|
— | Weight: Exactly 2.5 kg (5.5 lbs) each (5.0 kg pair) | Calibrated spinlock compression clamp |
|
Lock-Jaw / Quick-Release Clamps
|
— | High-tensile nylon resin with TPE rubber grip pads | Weight: ~350–400g pair |
|
Spring Wire Clip Collars
|
— | Coiled chrome spring steel wire | Low clamping force, suitable for horizontal bench only |