Bumper Plates: What They Are, Types, Sizes and Whether You Need Them

Bumper plates are thick rubber weight plates designed to be dropped, and you need them only if your training involves letting the bar fall from the hip or overhead. If you lower every rep under control, slimmer cast iron plates are cheaper and fit more weight on the bar. Below is how bumpers work, the types you'll see on sale in the UK, what the colours mean, and the set we'd start with.

What bumper plates actually do

A normal iron plate hitting concrete from overhead is loud, it chips, and the shock travels up the bar into the sleeves. Bumpers fix that by putting a thick ring of rubber between the steel bar and the floor. The rubber deforms on impact, soaks up a big chunk of the energy and hands the rest back as a bounce.

That matters most for the Olympic lifts. In a snatch or a clean and jerk you finish with the bar at arm's length overhead, and the safe way to get it down from there (especially on a missed rep) is to step back and let it go. The same goes for high-rep hang cleans and barbell conditioning work where lowering every rep slowly would wreck your grip and your timing. The NSCA's position statement on weightlifting for sports performance makes the case that these lifts and their derivatives build more force and power than general resistance training alone, which is why so many home lifters end up wanting to train them.

Floor protection is the other half of the job. Bumpers spread the impact over a wide rubber edge, so a decent mat or platform underneath survives far longer than it would under iron.

Why every bumper is 450 mm wide

Full-size bumper plates share one diameter: 450 mm, the same as competition discs. A 5 kg bumper and a 20 kg bumper therefore sit the bar at exactly the same height. That gives you two things:

• The same start position at any load. A beginner pulling 40 kg off the floor starts from the same bar height as someone pulling 140 kg. With small iron plates you'd have to deadlift from blocks to get that.
• Every plate takes the impact. When you drop a bar loaded with a 20 kg and a 5 kg, both plates touch down together, so the light one isn't left hanging off the floor while the heavy one takes the hit.

The catch is that weight has to come from somewhere, so lighter bumpers are thinner and heavier ones are thicker. Very light "bumpers" of 2.5 kg are usually thin and flexible and shouldn't be dropped on their own; they're technique plates.

Types of bumper plate

You'll mostly see four kinds on sale, plus a fifth that's rare in UK shops.

Crumb (recycled) rubber. Made from compressed rubber granules, often from recycled tyres. They're the cheapest per kilo, the most forgiving on the floor and the bounciest. Downsides: they're thick, so you fit less on the bar, and they can smell for a couple of weeks.

Virgin rubber. Moulded from new rubber rather than crumb. They're denser and slimmer than crumb plates of the same weight, bounce less and usually look tidier. This is where most of the "black bumper set" listings sit, and it's the best balance for a home gym.

Urethane. A harder, tougher coating that resists scuffing and doesn't smell. Urethane bumpers hold their looks for years in commercial gyms, but you pay a clear premium and they're overkill for most garages.

Competition (IWF-calibrated). Coloured all the way through, slim, with a steel hub and tight weight tolerances. They're built to the IWF's competition specification and are what you'll see on the platform at a weightlifting meet. Superb, and priced to match. If accuracy matters to you, our guide to calibrated plates covers them properly.

Hi-temp. A brand of recycled rubber bumper you'll occasionally see imported, known for being very thick and very bouncy. Treat it as crumb rubber for buying purposes.

What the colours mean

Coloured bumpers follow the International Weightlifting Federation's Technical and Competition Rules, which set the competition disc colours:

Weight	IWF colour
25 kg	Red
20 kg	Blue
15 kg	Yellow
10 kg	Green
5 kg	White

The same rules allow training discs in black with coloured rims, which is why so many home sets are black with coloured lettering. Either way, colour lets you read the load across the room, and it's handy when a training partner is changing plates for you.

Thickness and sleeve space

Here's the honest drawback of bumpers: they take up a lot of bar. On an Olympic barbell the loadable sleeve is limited, and a pair of thick crumb 20s eats a good portion of it on each side. As a reference point, one 150 kg black bumper set on Amazon lists its plates at roughly 2 cm (5 kg), 4 cm (10 kg), 6 cm (15 kg), 8 cm (20 kg) and 10 cm (25 kg) thick. Crumb plates run thicker still.

For snatches, cleans and jerks this rarely matters, since few home lifters snatch more than they can fit. For heavy deadlifts it can. Load enough thick crumb plates and you can run out of sleeve before you run out of strength; the usual fix is to load bumpers first and finish with a couple of iron plates on the outside. If you're unsure what your bar weighs or how long its sleeves are, our guide on how much a barbell weighs runs through the common UK bars.

Bounce

All bumpers bounce. Crumb plates bounce the most, virgin rubber noticeably less, and urethane and competition discs the least. A high-bounce plate dropped from overhead can kick the bar back towards your shins or roll it off the platform, so if you'll be dropping heavy snatches, a "low bounce" or "dead bounce" virgin rubber plate is worth the extra few pounds. On a thick mat, bounce matters less.

Bumpers fit Olympic bars only

Every full-size bumper has a 50 mm (2 inch) centre hole. They won't fit a 1 inch standard bar, and they're far too wide for most cheap standard-bar benches anyway. If you're building around a half rack or a folding squat rack, check the rack's J-cups and safeties can clear a 450 mm plate when the bar is racked low, which some compact racks struggle with.

Price per kg: bumpers vs cast iron

At the time of writing on Amazon UK, a 150 kg black rubber bumper set comes in around £2.40 per kg, and a single pair of 10 kg crumb bumpers around £3.50 per kg. Cast iron Olympic plates in pairs sit nearer £1.75 to £1.90 per kg. Buying bumpers as a full set rather than pair by pair is the single biggest saving you'll make.

So bumpers cost anywhere from a third more to nearly double what iron does for the same weight. That premium buys you the ability to drop the bar. If you don't need that, our best weight plates guide covers cast iron and rubber-coated options that leave money for a bar and rack.

Do you need bumper plates at home?

Buy bumpers if you:

• train snatches, cleans, jerks or any Olympic lift variation
• do barbell conditioning where you'll drop reps from the hip
• lift in a space where noise and floor damage are a real problem, and you'll be dropping weight

You probably don't need them if you squat, bench, press and deadlift with control. Deadlifts in particular are fine on iron as long as you lower the bar and pull on a platform or thick horse-stall matting. Rubber-coated iron is a reasonable middle ground for noise, but it isn't a true bumper and shouldn't be dumped from overhead.

A sensible starter set

For most people learning the lifts at home, a set of 2 × 5 kg, 2 × 10 kg, 2 × 15 kg and 2 × 20 kg (100 kg of bumpers) on a 20 kg bar takes you to 120 kg, which covers years of snatch and clean progress for most lifters. Add a pair of 25s only once you're cleaning more than about 110 kg. For small jumps between sessions, a set of fractional plates on the outside of the bumpers does the job without buying more 450 mm discs.

If you'd rather buy everything in one go, the GYM MASTER 150 kg set is the best value per kilo we found. It's five pairs of solid black rubber bumpers (5, 10, 15, 20 and 25 kg) with a stainless steel centre ring, a 2 inch hole and the 45 cm IWF-standard diameter, at around £359.99 at the time of writing. The listing says it isn't suitable for commercial use, which is fine for a garage.

Check the GYM MASTER 150 kg bumper plate set on Amazon

If you want to start small and add pairs as you go, PhysKcal's crumb rubber bumpers come as single pairs. The 10 kg pair is recycled crumb rubber with a stainless steel hub, a 450 mm diameter and IWF colour-coded numbering, at around £69.99 at the time of writing. Expect the bounce and thickness that come with crumb rubber.

Check PhysKcal 10 kg crumb bumper plates on Amazon

Recommended reads

• Best weight plates in the UK
• How much does a barbell weigh?
• Hang clean: how to do it
• Half rack buying guide
• All home gym guides