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The GCAB-STK puts weighted ab crunches and back extensions on one selectorized machine. Flip the pad position and you've switched from abs to lower back, with no second machine taking up floor space.
✓ Ab crunch and back extension on one machine
✓ 210 lb or 310 lb weight stack
✓ 20-position adjustable cam for range of motion
✓ 7-position foot brace for all sizes
✓ Seat angled at 30° for a controlled movement path
✓ Ultra-thick DuraFirm upholstery
Rated for home and commercial use.
Ab crunches and back extensions from the same seat.
A 20-position cam with a pop pin sets where each rep starts.
Choose 210 lb or 310 lb above and change weight with a pin.
Sit in, set the cam and foot brace, and crunch against the roller pad. Switch to back extensions and the same stack works your lower back.
The 7-position upholstered foot brace locks your lower body in place, so the work stays in your core.
Ab Crunch
Back Extension
Footprint
Watch the ab crunch and back extension setups step by step.
| Model | Body-Solid GCAB-STK (GCAB-STK/3 with 310 lb stack) |
| Dimensions | 55" L × 50" W × 71" H |
| Machine weight | 399 lb |
| Weight stack | 210 lb or 310 lb |
| Cam | 20-position adjustable |
| Foot brace | 7-position, fully upholstered |
| Seat angle | 30° |
| Frame | 2" × 4" steel mainframe |
| Upholstery | Ultra-thick DuraFirm |
| Lifetime In-Home Warranty | |
|---|---|
| Frame and welds | Lifetime |
| Bushings and hardware | Lifetime |
| Pads, cables and grips | Lifetime |
| Light Commercial Warranty | |
|---|---|
| Frame and welds | Lifetime |
| Bushings and hardware | 3 years |
| Pads, cables and grips | 1 year |
Yes. The same seat, roller pad and stack handle both ab crunches and back extensions.
The 210 lb stack covers most users. Choose 310 lb for stronger lifters or a facility. Both are options above.
55" × 50" of floor and 71" of height.
Both. It carries a lifetime in-home warranty and a light commercial warranty.
The GCAB-STK is Body-Solid's Pro Select model with its own weight stack. The GCAB360 is a separate Cam Series machine.
FREE Shipping via FEDEX, LTL Ground, & UPS. Ships in 2-3 Business Days.
Ships Only to Lower 48 States of the United States
The GCAB-STK puts weighted ab crunches and back extensions on one selectorized machine. Flip the pad position and you've switched from abs to lower back, with no second machine taking up floor space.
✓ Ab crunch and back extension on one machine
✓ 210 lb or 310 lb weight stack
✓ 20-position adjustable cam for range of motion
✓ 7-position foot brace for all sizes
✓ Seat angled at 30° for a controlled movement path
✓ Ultra-thick DuraFirm upholstery
Rated for home and commercial use.
Ab crunches and back extensions from the same seat.
A 20-position cam with a pop pin sets where each rep starts.
Choose 210 lb or 310 lb above and change weight with a pin.
Sit in, set the cam and foot brace, and crunch against the roller pad. Switch to back extensions and the same stack works your lower back.
The 7-position upholstered foot brace locks your lower body in place, so the work stays in your core.
Ab Crunch
Back Extension
Footprint
Watch the ab crunch and back extension setups step by step.
| Model | Body-Solid GCAB-STK (GCAB-STK/3 with 310 lb stack) |
| Dimensions | 55" L × 50" W × 71" H |
| Machine weight | 399 lb |
| Weight stack | 210 lb or 310 lb |
| Cam | 20-position adjustable |
| Foot brace | 7-position, fully upholstered |
| Seat angle | 30° |
| Frame | 2" × 4" steel mainframe |
| Upholstery | Ultra-thick DuraFirm |
| Lifetime In-Home Warranty | |
|---|---|
| Frame and welds | Lifetime |
| Bushings and hardware | Lifetime |
| Pads, cables and grips | Lifetime |
| Light Commercial Warranty | |
|---|---|
| Frame and welds | Lifetime |
| Bushings and hardware | 3 years |
| Pads, cables and grips | 1 year |
Yes. The same seat, roller pad and stack handle both ab crunches and back extensions.
The 210 lb stack covers most users. Choose 310 lb for stronger lifters or a facility. Both are options above.
55" × 50" of floor and 71" of height.
Both. It carries a lifetime in-home warranty and a light commercial warranty.
The GCAB-STK is Body-Solid's Pro Select model with its own weight stack. The GCAB360 is a separate Cam Series machine.
FREE Shipping via FEDEX, LTL Ground, & UPS. Ships in 2-3 Business Days.
Ships Only to Lower 48 States of the United States
