Mirafit M150 vs BowFlex 5.1S: Choosing an Adjustable Bench for a Home Gym

An adjustable bench looks simple compared with a treadmill or exercise bike, but small differences in geometry, load rating and storage can have an outsized effect in a home gym. The Mirafit M150 and BowFlex 5.1S both cover multiple training angles while taking noticeably different approaches to storage.

Product photographs. Images are not to scale; consult the specifications for dimensions.

Adjustment range

Mirafit specifies six backrest angles and four seat angles for the M150. BowFlex lists six backrest positions for the 5.1S: -20°, flat, 30°, 45°, 60° and 90°, along with an adjustable seat.

Load capacity

The M150 has a tested total capacity of 260 kg. BowFlex/Johnson Fitness publishes a 272 kg maximum load capacity for the 5.1S. Remember that a bench load rating normally needs to account for both the user and the external weight being handled.

Moving and storing the bench

The M150 uses a built-in handle and castors to make repositioning easier. The BowFlex 5.1S also includes transport wheels, but its distinctive feature is a vertical stowable design. That can be useful in a room where the training area needs to be reclaimed after a session.

Construction details

Mirafit publishes 7 × 5 cm steel frame tubing and 6 cm anti-slip padded cushions for the M150. The 5.1S uses a steel frame and padded surfaces, with its design placing more emphasis on its stowable mechanism.

GymVerity scores

The BowFlex 5.1S currently scores 87.1/100 with 94% Data Confidence. The Mirafit M150 scores 83.9/100 with 98% Data Confidence. These scores combine multiple dimensions; they are not a claim that one bench is the right choice for every home gym.

Sources

Johnson Fitness UK — BowFlex 5.1S
Mirafit — M150 Adjustable Weight Bench
Specifications checked 18 September 2026.