BUILT Strength Infinite Series Back Extension (New)
BUILT Strength Infinite Series Back Extension (New)
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Condition:
New
Product Condition
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Warranty:1 year parts & labor included
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Shipping:
Curbside & white glove options available
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Ship time:
Ships in 1-2 weeks
- Financing:
The Infinite Series Back Extension pairs a fixed 45-degree platform with a 200 lb selectorized stack, so you can load the posterior chain far past bodyweight without waiting on plates. Adjustable-height thigh pads set the pivot at the hips for a clean hinge, while quilted leg rollers and thigh pads keep you locked in through every rep.
A D-clip attachment point accepts multiple handle styles — a straight bar is included — for weighted extensions that scale with the athlete, and a bar catch at the bottom keeps the bar within reach between sets. Fixed handlebars at the thigh pads assist entry and exit, and the textured flat and angled platforms deliver no-slip traction on high-traffic commercial floors.
Primary muscles targeted
Secondary muscles
Key features
Specifications
New Equipment comes with a comprehensive 1-year Parts and Labor Warranty*. This warranty safeguards against any mechanical failure not associated with inadequate preventative maintenance that may occur during the first year of ownership. The cost of both the part and the labor for replacement are covered by CTX Home Gyms, ensuring a worry-free experience and providing you with peace of mind in your investment.
Shipping Calculator
- For nationwide orders outside of Austin, we securely palletize your equipment and ship it via trusted freight carriers. Your equipment will be delivered to your driveway or garage. Remanufactured items are typically shipped fully assembled, and New items are typically shipped crated.
Local Delivery
- For customers in our local Greater Austin delivery radius, we offer convenient delivery straight to your garage or room of choice.
Warehouse Pickup
- Prefer to handle it yourself? Pick up your order directly from our Jarrell, TX warehouse at no extra cost. We’ll help you load up and get you on your way.
📦 Shipping Cost Calculator:
- Use the Shipping Calculator above to get an instant, accurate shipping estimate based on your location and order size.
How do I select weight on a selectorized machine?
Insert the weight pin into the desired stack hole; ensure it clicks into place before use.
What weight stack size should I choose?
Most base level weight stacks can accommodate even advanced lifters, but for the real weight-movers, look for the items with expansion stacks.
What maintenance is required?
Inspect guide rods and stack alignment monthly; wipe rods and replace worn bushings annually.
Is installation available?
Yes—schedule professional installation during checkout for a seamless setup.
What warranty covers these machines?
New units carry full OEM coverage; remanufactured units include a 12 month CTX Guarantee.
Which selectorized lower-body machines are essential?
Leg extension, leg curl, and seated leg press are are top sellers and most common in gyms.
How do I adjust range of motion?
Most machines have adjustable backrests and pivot points; use numbered markers for consistency.
Do they require floor mounting?
Not required, but it never hurts; ensure a level surface and clear 3′ around the machine.
What financing options exist?
Same 0% APR financing available for all selectorized machines via Shop Pay.
Are replacement parts available?
Yes—CTX stocks common cables, pulleys, and bushings for quick maintenance.
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