REP Fitness
REP x PÉPIN FAST Series Adjustable Dumbbell
Magnetic pop-pin pair published at 10–125 lb56.7 kg per hand, 18.3 in46.5 cm long at max, with 2.5/5/10 lb increments and a lifetime warranty.
Spec-based page. We did not test this product. Source: manufacturer page.
Who it's for
Lifters who want REP's published 10–125 lb56.7 kg all-metal FAST Series pair with expandable 85/105/125 lb configurations.
Who should skip
Anyone who needs a starting weight below 10 lb4.5 kg or original Pépin parts, which REP states are not compatible.
| HeightAssembled height versus your ceiling. | Not published |
|---|---|
| Width | Not published |
| Length | 18.3 in46.5 cm |
| Unit weight | Not published |
|---|---|
| Min weight | 10 lb4.5 kg |
| Max weight | 125 lb56.7 kg |
| Increment | 2.5 lb1.1 kg |
| Adjustment | magnetic pop-pin |
|---|---|
| Warranty | Lifetime warranty (original purchaser) |
Source: manufacturer spec sheet, checked 2026-10-14. How we measure
REP publishes a 10 lb4.5 kg minimum and 125 lb56.7 kg maximum, with pairs sold as 85, 105, and 125 lb56.7 kg configurations and add-on plates to expand 85 or 105 lb47.6 kg pairs.
Weight changes use magnetic pop-pins in 10 lb4.5 kg steps, plus two 2.5 lb1.1 kg micro-adjustment plates for 2.5 or 5 lb2.3 kg jumps.
Maximum length is 18.3 in46.5 cm; handles are 34 mm nickel-plated; warranty is lifetime for the original purchaser.
Nearby specs
| Spec | REP x PÉPIN FAST Series Adjustable Dumbbell | Bowflex SelectTech 552 Check price on Amazonon Amazon on Amazon. As an Amazon Associate I earn from qualifying purchases. | Bowflex SelectTech 1090 Check price on Amazonon Amazon on Amazon. As an Amazon Associate I earn from qualifying purchases. |
|---|---|---|---|
| Height | Not published | ✓ 9 in22.9 cm | 10 in25.4 cm |
| Width | Not published | ✓ 8.3 in21.1 cm | 9.5 in24.1 cm |
| Length | 18.3 in46.5 cm | ✓ 16.9 in42.9 cm | 17.5 in44.5 cm |
| Unit weight | Not published | 54.6 lb24.8 kg | ✓ 92.3 lb41.9 kg |
| Min weight | ✓ 10 lb4.5 kg | 5 lb2.3 kg | ✓ 10 lb4.5 kg |
| Max weight | ✓ 125 lb56.7 kg | 52.5 lb23.8 kg | 90 lb40.8 kg |
| Increment | ✓ 2.5 lb1.1 kg | ✓ 2.5 lb1.1 kg | 5 lb2.3 kg |
| Adjustment | magnetic pop-pin | dial | dial |
| Warranty | Lifetime warranty (original purchaser) | Parts 2 Years | Parts 3 Years |