Every machine in our Leg Extension Machines collection loads the movement in one of two ways: a weight stack you set with a pin, or plates you load yourself. That choice decides how fast you change the weight, how heavy you can go, and what the machine asks of your space.
The Short Answer
- Selectorized (weight stack): the fastest weight changes, and the weight comes with the machine. It suits shared use and drop sets. The top of the stack is the limit: 210 to 310 lbs on the machines in our collection.
- Plate-loaded: uses the plates you already own, and the limit is the machine's plate capacity. Changes take longer, and the plates need storage nearby.
- Either way, the number on the stack or the plates is not the resistance you feel. Compare machines on fit and adjustments first.
How Each Type Changes the Load
On a selectorized machine, the pin sets the load in one move, so you can go from a warm-up set to a working set, or drop the weight mid-set, in a few seconds. That matters most when several people share the machine and each one resets it.
On a plate-loaded machine, you add or remove plates on a horn. It takes longer, especially when you strip weight at the end of a set. The GMWD Fitness LE08 2.0 adds a load ratio selector that raises the resistance by 1.1x or 1.2x without touching the plates.
Maximum Load and Weight Steps
A stack sets a fixed ceiling. In our collection, stacks run from 210 to 310 lbs, and some machines offer a heavier stack as an option, such as the 310 lb stack of the Bells of Steel Basilisk.
A plate-loaded machine is limited by what its horns and frame accept: GMWD rates the LE08 2.0 for 330 lbs of plates. Muscle D does not publish a figure for the Pro Strength Leg Extension.
Weight steps work the other way round. On a stack, the smallest change is one plate of the stack. With plates, it is the smallest plate you own, often 2.5 lbs, which allows slow, steady progression.
The Number Is Not the Resistance
Stacks act through cables, pulleys and cams; plates act through a lever arm. Bells of Steel specifies a 1:1 ratio on the Basilisk, and GMWD lets you choose the leverage on the LE08 2.0, but 200 lbs on one machine does not necessarily feel like 200 lbs on another. Compare machines on fit and adjustments, then set the weight by feel. Our guide to cable machine pulley ratios explains the same effect on cable stations.
Space, Weight and Delivery
A selectorized machine carries its own stack, so it weighs more, which matters if it has to go down to a basement: the Basilisk weighs 534 lbs with the 210 lb stack and 635 lbs with the 310 lb stack. A plate-loaded frame is lighter, 231 lbs for the GMWD LE08 2.0, but you need the plates and a place to keep them. The LE08 2.0 stores up to 570 lbs of plates, and the Muscle D Pro Strength has integrated plate storage.
Among the machines in our collection with published dimensions, lengths run from 54.6 in (GMWD LE08 2.0) to 68 in (Force USA Solitude). Leave room to step in from the side and, on a plate-loaded machine, to load the horn.
Leg Curl or Not
Most machines in our collection pair the extension with a leg curl, which trains quads and hamstrings in one footprint. Check how the curl is done:
- Seated curl: you stay seated, with a thigh pad holding you in place, as on the Temple of Gainz Quadrilogy.
- Prone curl: you lie face down on the pad, as on the GMWD LE08 2.0.
A dedicated extension, such as the Muscle D Pro Strength, does one movement and leaves the curl to another machine.
Fit and Adjustments
Whatever the loading, your knee should line up with the pivot of the machine. The back pad moves to set that alignment, the leg roller rests on the lower shin, and an adjustable start position sets the range of motion. More positions fit more users: Bells of Steel sizes the Basilisk for users from 5 ft 3 in to 6 ft 2 in, GMWD sizes the LE08 2.0 from 5 ft 3 in to 6 ft 5 in, and the Quadrilogy has 10 start positions and 5 roller positions.
Leg Extension Machines in Our Collection
| Machine | Loading | Stack or plate capacity | Leg curl |
|---|---|---|---|
| Temple of Gainz Quadrilogy | Stack | 264 lbs | Seated |
| Bells of Steel Basilisk | Stack | 210 or 310 lbs | Included |
| Bolt Fitness Supply Shock Series | Stack | 230 lbs | Included |
| Force USA Solitude | Stack | 220 lbs | Included |
| GMWD Fitness LE08 2.0 | Plates | 330 lbs | Prone |
| Muscle D Pro Strength | Plates | Not published | No |
The Quadrilogy is also offered with VOLTRA I integration, a digital resistance device sold separately, in place of the stack.
Which One Fits Your Gym?
- Home gym, one or two users, plates already on hand: a plate-loaded machine puts what you own to use.
- Home gym, short sessions or several users: a selectorized combo saves time between sets and between people.
- Facility: a stack resets in seconds between members, while plates need storage beside the machine. Check that the machine is rated for commercial use, and for several units, request a quote.
Not sure which one fits? Tell us your space, who will use the machine and the plates you own, and we will compare the options with you.
FAQ
Do I need Olympic plates for a plate-loaded leg extension?
Check the horn size on the product page. The GMWD LE08 2.0 takes Olympic plates with a 2 in center hole.
Can I do drop sets on a plate-loaded machine?
Yes, by stripping plates between drops, but it takes longer than moving a pin. On the GMWD LE08 2.0, the load ratio selector is a faster way to make small changes.
