PRX Prime Bumper Plates
Solid-rubber bumpers with a warranty that splits by weight — and an explicit instruction never to drop the light ones alone.
Specs
| Material | Solid rubber |
|---|---|
| Colour | Black with embossed print |
| Collar opening | 50.6 mm ±0.2 mm |
| Diameter | 17.75 in, all weights |
| Width, 45 lb | 3.18 in |
| Width, 35 lb | 2.59 in |
| Width, 25 lb | 2.00 in |
| Width, 15 lb | 1.37 in |
| Width, 10 lb | .90 in |
| Warranty, 25 to 45 lb | 2 years |
| Warranty, 10 and 15 lb | 90 days |
These figures are copied from PRX Performance’s own published specs and were last checked on 2026-08-31. Manufacturers revise products without notice, and variants differ. Confirm anything your decision depends on with PRX Performance before you buy.
Choose this one if
- You want a full set cheaply and load mostly with 25s and 45s
- You rarely drop a lightly-loaded bar from height
- You would rather have thick, forgiving plates than thin, sleeve-efficient ones
The detail
Read the warranty before the price. PRX gives the 25, 35 and 45 lb plates two years and the 10 and 15 lb plates ninety days, and pairs that with an explicit instruction: do not drop the 10 or 15 lb plates alone on the bar, or the warranty is void.
That is unusually honest, and it is a real constraint rather than legal boilerplate. Small bumpers are thin, so a light bar dropped from overhead puts the whole impact through a narrow ring of rubber and into the insert. Every brand's small plates fail this way; PRX is one of the few to say so on the product page. If your training involves technique work with an empty-ish bar dropped from height, plan to own a pair of change plates or a set of thin competition plates instead.
On width these are the thickest bumpers on the site. A 45 is 3.18 inches against the Rogue Echo's 2.40 and Fringe's competition 2.15. On a 16-inch sleeve you fit four a side and no more, so this is a set for someone loading in the low hundreds rather than chasing a heavy deadlift.
The 50.6 mm collar opening with a ±0.2 mm tolerance is the standard fit and the same figure Rogue publishes for the Echo. It should slide onto any Olympic sleeve without fighting.
Solid rubber rather than a crumb composite is the right call at this price: crumb sheds and loses shape, solid rubber holds up. The trade is weight and smell in the first few weeks.