REP® x PÉPIN™ FAST Series™ Adjustable Dumbbell
- Regular price
- €1.257,01
- Sale price
- €1.257,01
- Regular price
- $
- Unit price
- / per
Orders placed on February 14, 2026 will start shipping by May 05, 2026. If already purchased refer to your order confirmation for ship date.
OVERVIEW
The REP® x PÉPIN™ FAST Series™ Adjustable Dumbbell is a collaboration between REP and Canada-based PÉPIN.
Through REP’s Inventor Series, we partner with outstanding independent inventors from around the world, working closely with them to refine and scale their ideas using our engineering resources and deep home-gym expertise. The result: innovative equipment made more accessible-benefiting inventors, athletes, and the broader training community alike.
The REP® x PÉPIN™ FAST Series™ Adjustable Dumbbells are the result of a close collaboration between REP and Canada-based PÉPIN. Designed to deliver uncompromising performance in a compact footprint, this system combines dense, all-steel construction with fast, intuitive adjustments and premium fit and finish.
CNC-cut steel plates with a durable black powder coat keep the dumbbells exceptionally compact, accurate, and built for long-term use. Both the dumbbells and cradles are fully metal, reinforced with UHMW liners to prevent steel-on-steel contact, and extensively drop-tested from every angle. The result is an adjustable dumbbell that can be re-racked with confidence and trained hard-day after day-without compromise.
One Platform. Now in Two Weight Standards.
The FAST Series™ is now available in two versions:
The LB version— the original dumbbell pair many lifters already know and love.
The new KG version is refined specifically for metric weights and dimensions
While both versions share the same core DNA, the kilogram model incorporates subtle but important refinements to ensure the same smooth, confident experience at higher-density loads. These include shortened magnetic pop-pins, optimized for the denser metric plate stack, and re-profiled bookends and cradle geometry to maintain consistent racking feel at heavier total weights.
KG Version Overview
40 kg to 60 kg range in a highly compact 46.5 cm length
CNC-cut, all-steel plates for accuracy, durability, and premium feel
All-metal dumbbells and steel cradles designed for repeated heavy training
Fast, secure weight changes in 5 kg increments using a magnetic pop-pin
Includes 1.25 kg micro plates for precise 2.5 kg jumps
Offered in 40 kg, 50 kg, or 60 kg pairs, fully upgradeable over time
Expandable steel cradle adapts as you add weight—no replacement needed
Nickel-plated, volcano-knurled handles for confident grip
Laser-etched weight markings and refined REP® x PÉPIN™ branding throughout
LB Version Overview
Scales from 10 lbs to 125 lbs at just 18.3” long for exceptional compact density
CNC-cut steel plates and all-metal construction for durability, balance, and premium feel
Fast, secure adjustments in 10 lb increments via a magnetic pop-pin
Includes 2.5 lb micro-plates for smaller, precise weight jumps
Available in 85 lb, 105 lb, or 125 lb pairs, all fully upgradeable
Expandable steel cradle grows with added weight for long-term compatibility
Pro-style dumbbell heads with flat bottoms to prevent rolling
Nickel-plated, volcano-knurled handles for confident grip
Laser-etched weight markings and signature REP® x PÉPIN™ branding
One system. Two standards. No compromises—just precision-built strength, your way.
KG DIMENSIONS
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Cradle Length506mm
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40kg Dumbbell Length368mm
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50kg Dumbbell Length417mm
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60kg Dumbbell Length465mm
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Cradle Width135mm (Cradle Base) & 155mm (Bookend Max Width)
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Height (Cradle With Dumbbell)205mm
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Height (Cradle Without Dumbbell)125mm
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Usable Handle Length125mm
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Handle Diameter34mm
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Plate Diameter188mm
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Cradle Weight (When Empty)4.9kg
LB DIMENSIONS
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Cradle Length18.9"
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85lb Dumbbell Length14.5"
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105lb Dumbbell Length16.4"
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125lb Dumbbell Length18.3"
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Cradle Width5.3"
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Height (Cradle With Dumbbell)7.2"
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Height (Cradle Without Dumbbell)4.9"
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Usable Handle Length4.9"
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Handle Diameter34mm
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Plate Diameter7.0"
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Cradle Weight (When Empty)10.8lbs
PRODUCT FEATURES
HEAVY AND COMPACT
Heavier and more compact than most adjustable dumbbells, delivering exceptional density in a minimal footprint.
KG Version: Up to 60 kg at just 465 mm in length
LB Version: Up to 125 lbs at only 18.3” long
EXTREME DURABILITY
Both the dumbbells and cradles are made with full metal construction and have been extensively drop-tested from every angle.
SPACE SAVING
Adjustable dumbbells take up a minimal footprint in your gym, replacing an entire range of fixed dumbbells while freeing up valuable floor space.
FAST WEIGHT CHANGES
Quick, secure adjustments designed to keep training moving without interruption.
KG Version: 5 kg jumps via magnetic pop-pin, plus 1.25 kg micro plates for 2.5 kg increments
LB Version: 10 lb jumps via magnetic pop-pin, plus 2.5 lb micro plates for 2.5 lb or 5 lb increments
EXPANDABLE SYSTEM
Start with what you need today and scale up without replacing your setup.
KG Version: Available in 40 kg, 50 kg, or 60 kg pairs, fully upgradeable
LB Version: Starts at 85 lbs, upgradeable to 105 lbs or 125 lbs
Both: Expandable steel cradles grow with added weight—no replacement required
NICKEL-PLATED HANDLES
Nickel-plated handles are 34mm in diameter and feature a volcano-style knurling pattern that provides plenty of grip without being overly aggressive.
MEDIA GALLERY
VIDEOS
- REP × Pepin KG Adjustable Dumbbells – Precision & Performance
REP × Pepin KG Adjustable Dumbbells – Precision & Performance
Introducing the REP® x PÉPIN™ FAST Series™ new kilogram adjustable dumbbell. These compact, all-metal constructed dumbbells are the result of the perfect collaboration between the REP® Colorado-based engineering team and Pépin with his innovative design. The perfect addition to your home gym for strength training and accessory training work.
FAQS
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Why choose an adjustable dumbbell instead of fixed dumbbells?
Adjustable dumbbells take up less space than a set of fixed dumbbells. A pair of 125lb REP® x PÉPIN™ FAST Series™ adjustable dumbbells can replace 23 pairs of fixed dumbbells (10lbs-125lbs).
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What makes these better than other adjustable dumbbells?
Most other products cannot go as heavy, or if they can, they're slow to adjust.
Our dumbbell retains the shape of a traditional dumbbell, with guide rails that add function. Other heavy adjustable dumbbells are bulky or oddly shaped, sacrificing the feel of a traditional dumbbell.
Other quick-adjust dumbbells use fragile plastic parts that control the adjustment mechanism, and if they break, the dumbbell is useless.
Other quick-adjust dumbbells that advertise all-metal construction typically still have hidden gearing made of plastic. Or if it is metal, it's still a small, moving piece hidden from view with unknown, real-world strength. Our adjustment mechanism is a thick steel bar. It's simple to use and simple to understand; that's why it's incredibly strong.
Other adjustable dumbbells advertising drop resistance typically only drop them straight down—the easiest test. Edge drops are a tougher measure of durability in real-world testing, and we incorporate those in our durability tests.
Our dumbbells are expandable by simply buying more plates. Many other systems lock you into whatever size you originally buy.
We're using premium materials throughout. Nickel plating on the knurled handle, combined with strategic use of Cerakote, powder coating, and stainless-steel hardware choices, all create one of the most durable and beautiful adjustable dumbbells ever made.
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What’s the difference between the REP® x PÉPIN™ FAST Series™ adjustable dumbbells and REP® QuickDraw™ adjustable dumbbells?
While there are some similarities – such as volcano-style knurled, steel handles; micro jumps of 2.5lbs or 5lbs; extensive drop-testing; space-saving capabilities; quick and easy weight changes; the ability to expand weight over time; a max length of just over 18”; and a pro-style shape with a flat bottom to prevent rolling – there are many differences. A few of the main ones include:
The weight capacity: The QuickDraw™ starts at 5lbs and goes up to a 60lbs max. The REP® x PÉPIN starts at 10lbs and tops out at 125lbs. The QuickDraw™ comes in the following sizes: 30lbs, 40lbs, 50lbs, and 60lbs. The REP® x PÉPIN in 85lb, 105lb, or 125lb pairs.
The materials: The QuickDraw™ has steel switches and an almost-all steel construction accented by strong, nylon composite. The REP® x PÉPIN dumbbells and cradles are constructed entirely of metal, with UMHW liners to prevent steel-on-steel contact.
The mechanism to change the weight: The QuickDraw™ uses a Lock-N-Load switch; you can flip one switch at a time or multiple switches all at once for fast weight changes. The REP® x PÉPIN uses a magnetic pop-pin.
Design: The QuickDraw™ dumbbells are entirely new to the market, whereas REP® x PÉPIN dumbbells were created as a partnership between REP® and a Canadian inventor, as part of the REP® Inventor Series. The original concept of these dumbbells started with Pépin, and REP® recognizes and honors his exceptional work in the fitness industry.
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What's the difference between the original PÉPIN™ FAST Series™ adjustable dumbbells and the REP® x PÉPIN™ FAST Series™ adjustable dumbbells?
REP® x PÉPIN™ FAST Series™ adjustable dumbbells start at 10lbs rather than the original's 20lbs. This was achieved by incorporating high-strength aluminum in the headplates of the handle.
The handle side rail coating was changed to Cerakote with a high-contrast laser-etching to better see the weight markings.
The cradle is now expandable.
We did a lot of "invisible" work alongside Pépin himself to turn this originally handmade product into one that is manufacturable, to make it accessible to a wider audience -- without sacrificing quality.
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Can I use my existing PÉPIN™ FAST Series™ adjustable dumbbell handles and plates?
No. Due to subtle changes in the design of the dumbbell and cradle, original PÉPIN™ FAST Series™ components are not compatible with the REP® x PÉPIN™ FAST Series™ adjustable dumbbell.
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How much do these dumbbells weigh?
They are sold in 85, 105, and 125lb pairs, but the 85lb and 105lb pairs are also expandable. If you buy the 85lb or 105lb pair, you can later buy more plates up to the 125lb max. You can also easily expand your existing cradles.
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What are the weight increments?
Each REP® x PÉPIN™ FAST Series™ adjustable dumbbell comes with two micro-adjustment plates that weigh 2.5lbs each. Using these weights, you can increase the weight of each dumbbell in 5lb increments up to 125lbs. The micro-adjustment plates also allow for 2.5lb adjustments, if you don't mind the small imbalance between the two heads. Having the micro-adjustment plate inside the handle and closer to the center of gravity reduces that issue.
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What is the minimum and maximum weight of REP® x PÉPIN adjustable dumbbells?
The minimum weight of the adjustable dumbbell is 10lbs. The maximum weight is 125lbs.
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How do you adjust how much weight is selected?
Adjusting the selected weight is super easy and satisfying. On the side rail selector rods on each dumbbell, just press the magnetic pop-pins out, slide them to your desired weight, and then press them back in to hear a click.
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How quickly can you adjust the weight?
You can change weight very quickly -- even without the cradle, if you want to do drop sets. Just set the dumbbell down, press and slide the magnetic pop-pins, and then press them back into place.
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Do the weights rattle at all?
While they may not be completely silent like fixed dumbbells, the overall design and tight tolerances allow for minimal noise.
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What are CNC-cut plates?
CNC stands for "computer numerical control," a process of using computer software to control the movement and operation of machines that can cut, carve, or engrave materials.
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Is there a stand for the REP® x PÉPIN™ FAST Series™ adjustable dumbbell?
Soon! Our engineers are currently developing a special cart that will work with both the QuickDraw™ and REP® x PÉPIN™ FAST Series™ adjustable dumbbell.
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Does the REP® x PÉPIN™ FAST Series™ adjustable dumbbell have a warranty?
Yes, it comes with a lifetime warranty.
REP® will warranty these products from defects in material, functionality, and workmanship for the lifetime of the product. Lifetime warranty coverage ends when the product becomes unusable for reasons other than defects in material or workmanship. The warranty applies only to the original purchaser and is nontransferable.
While we've ensured the dumbbell is designed to withstand occasional drops without issue, even pro-style, fixed dumbbells can be broken with repeated drops and abuse. If you have to drop your adjustable dumbbell, we recommend dropping it as flat as possible, as edge drops will put the most stress on the dumbbell.
The lifetime warranty does not cover:
Wear and tear due to normal usage (e.g., scratches, dents, rust).
Any damage to any part resulting from abnormal/abusive use (consistent drops), negligence, lack of care, accidents (drops/dings), incorrect use and/or operation of the dumbbell as specified in the user manual by REP®.
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What's the best way to store the REP® x PÉPIN™ FAST Series™ Adjustable Dumbbell?
The REP® x PÉPIN™ FAST Series™ is designed exclusively for flat storage and operation, meaning it’s optimized for use on level surfaces. Using it on an angled surfaces, trays, or racks may impact its performance and stability, leading to potential operational issues. Products: Dumbbell Storage Cart and REP® Adjustable Dumbbell Storage Stand.