FLYBIRD Adjustable Weight Bench (WB5): Full Spec Sheet
FLYBIRD WB5 adjustable bench specs: ASTM-certified 800 lb capacity, 90° to -30° FID range, foldable — sourced from the current Amazon listing.
Last updated September 2026
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FLYBIRD's WB5 (sold under the FED Fitness/FLYBIRD name) is an ASTM-certified adjustable bench rated to 800 lb, with a back-pad range that runs 90° to -30° — full flat, incline and decline in one unit — and a 30-inch extended backrest (FLYBIRD listing on Amazon).
Where it sits against the other benches on this site
The WB5's decline goes further than REP's AB-3000 2.0 (-30° versus -12°), and it has genuine decline where REP's AB-3100 has none at all. Its 800 lb capacity sits between the AB-3100's 700 lb and the AB-3000 2.0's 1,000 lb, and it's listed as a foldable design (FLYBIRD listing on Amazon).
What an independent hands-on review found
Garage Gym Reviews' hands-on writeup measured the bench at 26.4 lb, with an 18.8-inch height at its standard setting, a 30.3-inch back pad and 10.6-inch pad width, and roughly a 2-inch gap between the back and seat pads — typical for a bench in this price tier, per the review. The reviewer counted 14 total adjustment positions in practice (7 back, 3 seat, 4 foot), a more conservative number than FLYBIRD's own marketing claim of "144 combinations" on the Amazon listing; the gap between those two numbers likely comes from FLYBIRD multiplying every angle combination mathematically rather than counting distinct practical settings, which is worth knowing if the marketing number is what drew you to this bench.
On comfort, the review found the back pad "a little more slick" than pricier benches like Rogue or REP models, lacking the same grip under sweat. Stability held up well: the lock-pin adjustment system kept the bench from shifting during use, even if it doesn't match the feel of a premium-tier bench. The fold mechanism itself is simple — pull the release pin and fold — and at 26.4 lb it's light enough for one person to fold and move without help.
The one fit issue the review flagged
Garage Gym Reviews measured the bench at 18.8 inches tall, taller than the 17-inch height used on IPF-regulated competition benches. For shorter lifters, that extra height can create foot-clearance issues during flat pressing — worth testing your own foot placement expectations against that number if you're on the shorter end, rather than assuming any adjustable bench matches competition dimensions.
Buying criteria tied to the specs above
- Steepest available decline for ab work: the WB5's -30° beats both REP benches covered on this site — see our decline sit-up bench comparison for how that compares directly.
- Shorter lifters worried about foot clearance: check the 18.8-inch height against your own setup before buying; it's taller than a competition-spec 17-inch bench.
- Sweaty-hand grip on the pad itself: the slicker CleanGrip-style finish reviewers compared unfavorably to Rogue or REP means a towel or a grippier bench wrap may be worth adding.
- One-person folding and moving: at 26.4 lb, this is the lightest bench compared across this site's adjustable-bench pages, easily managed solo.
- Buying based on the "144 combinations" marketing figure alone: treat that as a mathematical combination count, not a literal count of distinct practical settings — Garage Gym Reviews' hands-on count landed at 14.
Warranty and return terms
FLYBIRD's listing, per Garage Gym Reviews' review, backs the frame with a 1-year warranty and the pads with just 30 days — a shorter pad warranty than the frame gets, since pads see more wear from sweat and friction. The listing's return policy only accepts unopened items within 30 days, so factor in a short return window if you're ordering a bench sight-unseen.
Who it fits
If a genuine decline position matters more to you than the AB-3000 2.0's higher capacity or extra angle count, the WB5 is worth comparing directly against it — both decline, but the WB5 goes lower. If a slicker pad surface or the 18.8-inch height would bother you, weigh that against REP's AB-3000 2.0 or AB-3100, both built with a firmer, higher-grip pad material.
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For current availability, see the FLYBIRD WB5 adjustable bench on Amazon. For the higher-capacity, permanently-set-up alternative, see our REP AB-3000 2.0 breakdown.
General home-gym planning information only, not professional training advice. Specifications, availability and prices change — verify them with the manufacturer or retailer before buying. No hands-on testing of this product is claimed.
Questions people also ask
What does ASTM-certified mean for a bench like this?
ASTM International sets voluntary safety and performance standards that manufacturers can test products against; a listing calling out ASTM certification is stating the bench was tested to one of those standards, not just self-rated. The current Amazon listing states an 800 lb capacity under this certification (FLYBIRD listing on Amazon).
How does the WB5's range compare to REP's benches?
The WB5's 90° to -30° range covers a deeper decline than REP's AB-3000 2.0 (-12° lowest) and adds true decline the AB-3100 doesn't have at all (0° lowest, no decline) — see our adjustable weight bench comparison page for both (REP Fitness; FLYBIRD listing on Amazon).
Does the WB5 fold for storage?
Yes — it's listed as a foldable design (FLYBIRD listing on Amazon).