Big Boy Attachment

BIG BOY ATTACHMENT

$175 $195 Save $20

Color Options

Order Today And Receive By Friday, June 26

Proudly Designed & Manufactured in the USA

Safe, Durable & Reliable

Fast & Free Shipping

100% Money Back Guarantee

Need Help? Call Us (920) 301 3822

Questions? Ask AI

Who It's Built For

The seat upgrade for the rest of us. You're either configuring your first Vyper chair right now and wondering if your frame's going to fit comfortably on a 14-inch round seat, or you've owned the chair for a while and your hips are hanging off the edges by hour two. Either way, the answer is the same. The Big Boy attachment adds 7 inches of seat width and a thick steel base plate that turns the standard chair into the seat that actually fits.

It's not just for big guys, either. Plenty of average-frame buyers add the Big Boy because the wider seat means you don't have to center yourself perfectly when you sit down, you've got more leverage to push off when standing, and the chair feels even more rock-solid underneath you.

Fits: All Robust Steel Max and Elevated Steel Max models, and Robust Steel Pro
Pairs Well With: Adjustable Armrest for the most comfortable Vyper build possible.
Not compatible with the Sidekick

This is only the attachment, not the entire chair

Why You Need This Accessory

Adds 7 inches of seat width so your hips aren't hanging off the edges
Built on a thick steel base plate that adds weight and rock-solid stability
Gives older and mobility-limited buyers leverage to push off when standing up
Lets you sit down without having to perfectly center yourself on the seat
Improves balance and confidence when leaning or reaching at the bench
Pairs with the Adjustable Armrest for the most comfortable build possible
Compatible Robust Steel Max & Elevated Steel Max chair models, and the Robust Steel Pro stool (not the Sidekick)

30-Day 100% Money Back Guarantee

We get it. The price is more than you've spent on a shop fan before, and you can't test it before you buy it. That's why every Vyper purchase comes with a 30-day, 100% money-back guarantee. Set it up, use it, put it through a real weekend in your shop. If it's not what we said it was, send it back within 30 days and we'll refund every penny and cover the return shipping. We’ve got you covered, so you’re risk-free.

See full return policy here

Limited Lifetime Warranty

You've been burned by warranties before. The fine print, the runaround, the chatbot that loops you back to FAQs. That's not how Vyper works. Steel frame, hardware, and casters are covered for life. Cushions, mechanisms, and everything else are covered for 5 years. If something fails, give us a call (920) 301-3822 or email sales@vyperindustrial.com and a real person at our Green Bay headquarters picks up. Someone that knows the products and can help you along the way. We stand behind every shop stool we ship.

See full warranty here

Other Great Accessories

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ADJUSTABLE BACKRESTthe next level of comfort for your vyper chair. the stock...

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526 reviews

See It Before You Buy It.

See why customers are upgrading their Vyper chairs with our most popular accessories.

DIMENSIONS14"x22"

ADJUSTBLEN/A

Cushion Thickness4"

FitsRobust & Elevated Steel Max, Robust Steel Pro

MADE INWisconsin, USA

QUESTIONS? CALL US.

(920) 301 3822

You need the BIG BOY ATTACHMENT if you....

You need the BIG BOY ATTACHMENT if you....

ARE A BIG GUY AND TIRED OF SEATS THAT AREN'T BUILT FOR YOU

Most shop chairs are sized for an average frame and you've spent decades sitting on the edges. The Big Boy adds 7 inches of seat width so you can actually sit on the chair instead of perched on it. Reviewers at 6'4" 400 lbs, 6'6" 300 lbs, and every size up tell us the same thing: it's the first shop seat that actually fits. The chair built for the rest of us.

ARE AVERAGE FRAME AND JUST WANT THE CHAIR TO FEEL MORE SOLID

A real pattern in our reviews: customers who aren't actually "big guys" buying the Big Boy anyway. The reasons keep coming up. The thick steel base plate adds weight and stability you can feel under you. The wider seat means you don't have to center yourself perfectly to sit down. The extra surface gives you better leverage when you lean or reach. It's not a big-guy upgrade, it's a chair upgrade that big guys also need.

ARE GETTING OLDER AND NEED HELP PUSHING YOURSELF UP TO STAND

A real pattern in our reviews: older buyers and customers with mobility limitations explicitly mention the Big Boy as the upgrade that lets them keep using the chair safely. The wider seat gives you a wider surface to push off when standing up. The extra stability gives you confidence the chair won't shoot out from under you when you're getting in or out. The accessory that turns the chair from "I'll need help getting out of this" to "I've got it."

VALUE COMFORT OVER SAVING A COUPLE HUNDRED BUCKS

Real talk from our reviews: buyers consistently spend weeks talking themselves into the Big Boy after already spending $600+ on the chair. The math feels weird. You just spent serious money on a chair, why spend another $200? Then they install it and immediately wish they'd added it to the original order. Comfort isn't a one-time decision, it's something you feel every single time you sit down for the next ten years. Saving $200 today costs you a decade of "I should've gotten the Big Boy." The buyers who add it to the order don't write that review. The buyers who didn't, do.

BUILT IN WISCONSIN

Every Vyper chair is hand-built in Green Bay, Wisconsin. No cheap parts, no shortcuts. Every component fabricated by Americans who give a damn about what they build.

30-DAY RISK-FREE TRIAL

Sit in it for a month. Roll it across your shop floor. Beat on it. If it's not the best chair you've ever owned, send it back for 100% of your money.

SHIPS FREE & FAST

The BIG BOY ATTACHMENT ships free to your door from our Wisconsin facility. Most orders go out within 48 hours, and you'll get tracking the moment it leaves the dock. No surprise fees, no third-party warehouse delays.

GOOD GUY WARRANTY

Stuff happens. A caster wears out, a bolt strips, a weld doesn't hold. If rare event ever happens, send it back and we'll replace it. Frame, casters, and hardware are covered for life. Everything else is covered for 5 years.

JAY LENO

RICHARD RAWLINGS

BILL GOLDBERG

ADAM LZ

HOONIGAN

CHIP FOOSE

01/06

VIEW ALL FAQS

WARRANTY

QUESTIONS? CALL US.

(920) 301 3822

The most-purchased Vyper accessories are the Adjustable Backrest, Adjustable Armrest, Big Boy, Tool Tray, and Sidekick. Each one solves a specific problem:

Adjustable Backrest: Replaces the stock backrest with a 10° tilt and 4" of height adjustment, for buyers who want to dial in lumbar support exactly.
Adjustable Armrest: A solid grip for sitting down and standing up, and most importantly, to improve posture / stability.
Big Boy: Adds 7" of seat width, for larger frame buyers or anyone who wants more room and stability.
Tool Tray: Bolts to the underside of the chair to hold sockets, loose bolts, and shop rags.
Sidekick: Side-mounted attachment with cup holders, a tool holder, and storage for spray bottles, polishers, and shop towels.

All accessories are made in Green Bay, Wisconsin and ship with the same warranty and 30-day guarantee as the chairs themselves.

The Sidekick mounts on the side of the chair for what you're actively using (spray bottles, polishers, microfibers, a cold drink), while the Tool Tray bolts underneath for what you've already used or what might fall (loose bolts, dropped sockets, shop rags, small parts).

They're built to work together, not against each other. Detailers and fabricators who run the Complete Package (Robust Steel Max + Tool Tray + Sidekick) consistently say the two-accessory combo turns the chair into a real mobile workstation. Sidekick at hand for the polisher you're using right now, Tool Tray below for the spent microfibers and parts. If you can only pick one, the Tool Tray is the accessory most buyers later say they wish they'd added from day one.

No. The Big Boy and the Sidekick cannot be installed on the same chair, they mount in the same location and you have to pick one. Our specialists at (920) 301-3822 can walk you through the right choice if you're not sure.

The decision is usually clean. If you're a larger-frame buyer (or an older buyer wanting more leverage when standing), get the Big Boy. If you're a detailer, fabricator, or anyone who works with supplies at the seat all day, get the Sidekick. The Adjustable Backrest, Adjustable Armrest, and Tool Tray all work with either choice, so you don't lose any other accessories by picking one over the other.

For most buyers, the stock backrest is built right and works exactly as designed. The Adjustable Backrest is the upgrade for the buyer who lives in the chair, taller height range, up to 10° of recline, and the ability to dial in the support position to your specific body and the way you actually work.

Roughly half of buyers add it during initial chair configuration. The other half buy it months later, after deciding they want to fine-tune the backrest position even further. Reviewers consistently describe it as the upgrade that turns the chair from "comfortable" into "I never want to get up." Compatible with the Robust Steel Max and Elevated Steel Max chairs, and pairs with either the Big Boy or the Sidekick.

The Big Boy adds 7" of additional seat width, built for two specific buyers: larger-frame customers (280 lbs and up, or anyone who finds the standard seat too narrow) and older buyers who want more leverage when sitting down and standing up.

Reviewers consistently call it a confidence upgrade. The wider seat means you don't have to perfectly center yourself when sitting, and the wider surface gives you something to push off when standing. It's the most-recommended upgrade in the Vyper review base for buyers in their 60s, 70s, and 80s. Available on all Vyper chairs except the Low-Pro and Robust Steel Sport. Cannot be combined with the Sidekick.

Yes. Every Vyper accessory is designed to bolt onto chairs already in your shop, you don't have to buy them at the same time as the chair. Roughly half of buyers add accessories during the initial chair configuration. The other half buy them weeks or months later, after deciding what they actually need.

The Tool Tray, Sidekick, Big Boy, Adjustable Backrest, and Adjustable Armrest all install with basic hand tools and ship with instructions and hardware included. If you bought your Vyper chair years ago, the accessories from today's lineup are still compatible with the standard chair models. Call (920) 301-3822 if you're not sure whether an accessory fits an older chair.

The Vyper Backrest add-on works on the Robust Steel Pro and the Low-Pro Backrest works on the Low Pro, for buyers who started with a stool form factor and decided they wanted lumbar support after the fact.

The Big Boy is not compatible with the Low-Pro, but is compatible with the Robust Steel Sport. The Tool Tray and Sidekick are designed primarily for the Robust Steel Max and Elevated Steel Max chair frames. For a stool-specific tool-holding solution, the Robust Steel Pro ships with a built-in stationary tool tray as a standard feature, no add-on required.