FLYBIRD Adjustable Weight Bench (WB5): Specs and Fit in 2026

The FLYBIRD adjustable weight bench most people mean is the WB5. The listing states an ASTM-certified 800 lb rating and a back range from 90 degrees down to minus 30 degrees. That covers flat, incline and decline in one unit. It adds a 30-inch backrest and folds for storage. This review covers what FLYBIRD claims, what an independent review measured and who it suits.

The FLYBIRD WB5 is a light folding bench with the deepest decline of the adjustable benches we cover. It is a strong pick for small rooms. It is not the bench for heavy lifters who want a 1,000 lb rating or a grippy premium pad.

How we picked the FLYBIRD adjustable weight bench

We read the current Amazon listing and Garage Gym Reviews' hands-on review. We then compared the WB5 with REP's AB-3100 and AB-3000 2.0. We looked at range, rating, weight and fit for different body sizes, since those decide how well a folding bench works in a small room. We did not test the bench by hand, so check the current listing before you buy.

FLYBIRD WB5 specs

Capacity: 800 lb, ASTM-certified, per the listing.
Back range: 90 degrees down to minus 30 degrees.
Backrest: 30 inches, with a 15.7 inch seat pad, per the listing.
Adjustment: spring-lock pins for seat and back, plus a leveling foot pad.
Weight: 28.5 lb per the listing. Garage Gym Reviews measured 26.4 lb.
Folded width: about 9 inches, per the listing.
Height: 18.8 inches at the standard setting, per Garage Gym Reviews.

FLYBIRD WB5 Adjustable Weight Bench

Our verdict:

Best light folding bench with deep decline

Best for small rooms where one person folds and moves the bench.

View on Amazon

800 lb capacity, ASTM-certified per the listing
Back pad runs from 90 degrees down to minus 30 degrees
30-inch backrest and spring-lock seat and back adjustment
Folds in three steps; about 28.5 lb

Keep in mind: it sits taller than a competition bench, and the pad is slick.

Product details checked September 2026

What the FLYBIRD WB5 does well

Deep decline. Minus 30 degrees is deeper than REP's AB-3000 2.0 at minus 12. The listing also notes a gentler minus 10 degree step for easing into decline pressing.

Light and simple to fold. Pull the release pin and fold. At under 30 lb, one person can fold and carry it.

Stable when locked. Garage Gym Reviews found the lock-pin system kept the bench from shifting in use, even if it does not feel like a premium bench.

Long backrest. The 30-inch backrest supports your head during presses, which helps taller users.

Where the FLYBIRD WB5 falls short

Height for shorter lifters. Garage Gym Reviews measured 18.8 inches, taller than the 17-inch IPF competition height. Shorter lifters may struggle to plant their feet flat during presses.

Slick pad. The same review found the pad a little more slick than on Rogue or REP benches, with less grip under sweat. A towel or grippy bench cover helps.

Pad width. Garage Gym Reviews measured the pad at 10.6 inches wide. That is narrower than REP's AB-3000 2.0 at about 11.8 inches.

Short warranty. A 1-year frame term is short next to REP's 10-year frame warranty.

Lower rating. At 800 lb it sits below the AB-3000 2.0's 1,000 lb.

"144 positions" vs. a real count

FLYBIRD's listing markets 144 adjustable positions. Garage Gym Reviews counted 14 distinct settings in practice: 7 back, 3 seat and 4 foot. The gap likely comes from multiplying every angle by every other setting. Treat the big number as math, not a count of positions you will use.

Who the FLYBIRD adjustable weight bench suits

Good fit: small rooms where the bench must fold away after each session.
Good fit: anyone who wants deep decline for ab work on a light bench.
Good fit: taller users who want a long backrest.
Less ideal: shorter lifters who want their feet flat during presses.
Less ideal: heavy lifters who want a 1,000 lb rating.

How it compares with REP's benches

The WB5 declines further than both REP benches. Its 800 lb rating sits between the AB-3100's 700 lb and the AB-3000 2.0's 1,000 lb. It is far lighter than either REP bench and folds, where the AB-3000 2.0 does not store upright. The REP benches have grippier, wider pads and longer frame warranties.

Returns and warranty

The listing states a 1-year frame replacement and 3-year parts coverage. Garage Gym Reviews reported a 30-day term on the pads and noted a 30-day window for unopened returns. Terms can change, so read the current listing before you order.

Alternatives to the FLYBIRD WB5

Want a heavier, higher-rated bench that stays set up: see the REP AB-3000 2.0 review.
Want a lighter REP bench on wheels: see the AB-3100 review.
Mainly want decline ab work: the adjustable sit-up weight bench guide compares decline setups.
Want to compare six benches: the best adjustable weight bench roundup ranks them by use.

Our verdict on the FLYBIRD adjustable weight bench

The FLYBIRD adjustable weight bench (WB5) is a strong fit for small rooms that need deep decline in a bench that folds. Check its 18.8-inch height against your own leg length before you buy. If you want a higher rating and a grippier pad, and the bench can stay set up, choose the REP AB-3000 2.0.

Questions people also ask

What does ASTM-certified mean for this bench?

ASTM International writes voluntary safety and performance standards. A listing that cites ASTM certification says the bench was tested to one of them, not just self-rated. The WB5 listing states an 800 lb capacity under this certification.

How does the WB5's range compare with REP's benches?

The WB5 lists a range down to minus 30 degrees. REP lists minus 12 degrees for the AB-3000 2.0, and its own spec for the AB-3100 starts at flat.

Does the WB5 fold for storage?

Yes. FLYBIRD says it folds in three steps and cuts its footprint by about 80 percent, down to about 9 inches wide.

How long is the warranty?

The current listing states a 1-year frame replacement and 3-year parts coverage. Garage Gym Reviews reported 30 days on the pads when it reviewed the bench, so confirm the terms on the listing you buy from.