OVERVIEW
If you're looking to maximize your space without compromising your workout, this is the bench. The AB-4100 marries form and function with an expanded range of incline and seat positions, upgraded handle design, and black zinc hardware. The ladder-style adjustment system is quick and easy to adjust. At only 85lbs, this lightweight and maneuverable bench includes a built-in upright storage post with rubber coating to protect your floors and add extra stability.
This versatile adjustable bench is ideal for a wide range of athletes and features 7 back positions (0 to 85 degrees) and 3 seat positions (0, 10, and 20 degrees). The closed ladder design prevents you from lifting the ladder out when adjusting your AB-4100. We’ve also minimized the gap between the seat and back pad (1.57”) and married it with a squared off 12” back pad, featuring our improved CleanGrip pad material, so athletes of any size can lift comfortably and worry-free.
PRODUCT DIMENSIONS

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Bench Weight85lbs
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Bench Height17"
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Bench Width20.3"
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Bench Length51.3"
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Back Pad Angles0, 15, 30, 45, 60, 75, 85
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Seat Pad Angles0, 10, 20
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Back Pad Length36"
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Pad Width12"
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Seat Pad Length13"
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Pad Gap1.57"
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Footprint7.2 SQFT
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Tolerance3%
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Weight Capacity700lbs
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Material7- & 14-Gauge Steel
PRODUCT FEATURES
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Lightweight and Maneuverable
At only 85lbs this bench is lightweight and easy to maneuver around your home gym, especially when tight on space. -
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Vertical Storage
The AB-4100 includes a built-in upright storage post with rubber coating to protect your floors and add extra stability. -
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Style and Substance
The upgraded aesthetics of this bench means no compromises have to be made, especially with our launch of limited-edition colors. -

Adjustment Angles
This versatile adjustable bench is ideal for a wide range of athletes and features 7 back positions (0 to 85 degrees) and 3 seat positions (0, 10, and 20 degrees). -

Closed Ladder
The closed ladder design prevents you from lifting the ladder out when adjusting your AB-4100. -

IPF Height Standard
The AB-4100 was designed to meet IPF Height Standards for the athlete looking to stay consistent with training tools.
MEDIA GALLERY
VIDEOS
- HOW WE BUILT THE AB-4100 ADJUSTABLE WEIGHT BENCH
- AB-4100 Unboxing and Build Tips
- REP AB-4100 ADJUSTABLE BENCH REVIEW: SNEAKY VALUE!
HOW WE BUILT THE AB-4100 ADJUSTABLE WEIGHT BENCH
The AB-4100 is the newest addition to our bench line up. Designed in Denver by an in-house team of engineers, the AB-4100 is the ultimate home bench. Find out why and how we built it.
AB-4100 Unboxing and Build Tips
This video will help you make the most of your 4100 once it arrives. See how we unbox and learn some build tips.
REP AB-4100 ADJUSTABLE BENCH REVIEW: SNEAKY VALUE!
Lightweight, highly adjustable, and durable are just some of the words to describe the REP Fitness AB-4100 Adjustable Weight Bench. Seriously, this thing is capable of doing almost anything.
FAQS
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Is this compatible with a wide pad/seat?
It is compatible with the AB-3000 wide pad (no wide seat is needed) but the AB-3000 wide pad is 1.37" taller than the 4100 pad so when stored vertically, it will be angled and resting on the pad.
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How stable is the wide pad?The wider backplate combined with a 4-bolt connection allows the wide pad to be really stable on there versus the 5200 which has bolts down the center.
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What's the benefit of a closed ladder design?
A closed ladder design prevents you from lifting out the ladder when adjusting your bench and specifically when taking the bench vertical. The back pad does not swing around.
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Do you have any assembly tips?
Yes we do! Check out this video we made just for you.
WHAT OUR CUSTOMERS THINK
- Assembly
- Durability
- Portability
- Adjustability
- Value
- Rated 5 out of 5 stars1 month ago10/10 perfect bench
Perfekt stability, smooth moving, huge, handles a lot of weight perfectly, even prettier once it arrives. Best Bench i ever used, and ive been to a lot of gyms over the years.
And especially If you are tall and wide, Look No Further. This ist it.
LLukasVerified BuyerWas this helpful? - Rated 5 out of 5 stars2 months agoGreat benches
These rep benches have been everything I hoped for and more! I bougt 5 for my gym and couldnt be happier.
COColin O.Verified BuyerWas this helpful? - Rated 5 out of 5 stars2 months agoAB-4100 Bench 8 Month Review
I've had the AB-4100 adjustable bench for 8 months now, and am super happy with it. I love the width and support of the pad, the simplicity of adjustments and how easy it is to move. Assembly is pretty simple.
The gym my wife belongs to uses the AB-4100, so that says a lot to me. Great purchase!
DCDan C.Was this helpful? - Rated 5 out of 5 stars4 months agoExcellent heavy-duty bench
Excellent heavy-duty bench.
Easy to adjust the incline. Wheels are great and easy to move locations in my gym. Padding is great and design is smart with minimal gap between bench sections. Assembly was 20 mins. Last bench I will own.
TMTrevor M.Verified BuyerWas this helpful? - Rated 5 out of 5 stars5 months agoAB-4100 Bench Review
Great Bench. Very solidly built and great addition to my home gym.
GDGordon D.Verified BuyerWas this helpful?


