# Specialized Stumpjumper 15 Alloy vs Norco Sight A3 MX: specs and price compared

A sourced, side-by-side comparison of the Specialized Stumpjumper 15 Alloy (Specialized) and Norco Sight A3 MX (Norco) among mountain bikes. Specialized Stumpjumper 15 Alloy is the cheaper of the two at $3000.

## Side by side

| Spec | Specialized Stumpjumper 15 Alloy | Norco Sight A3 MX |
| --- | --- | --- |
| US price | $3000 | $3499 |
| Brand | Specialized | Norco |
| Released | 2025 | 2025 |
| Frame material | M5 Alloy | Aluminum |
| Wheel size | 29" (MX 27.5" rear compatible) | 29"/27.5" mullet (MX) |
| Fork travel (mm) | 150 | 160 |
| Rear travel (mm) | 145 | 150 |
| Suspension type | Horst-link (FSR) | High Pivot Horst-link |
| Drivetrain speeds | 12 | 12 |
| Groupset | Shimano Deore M6100 | Shimano Deore |
| Brake type | Shimano BR-MT420, 4-piston hydraulic disc | Shimano Deore MT520, 4-piston, 203/180mm rotors |
| Weight (lb) | 36.53 | — |

## Key differences

- Frame material: Specialized Stumpjumper 15 Alloy M5 Alloy vs Norco Sight A3 MX Aluminum
- Wheel size: Specialized Stumpjumper 15 Alloy 29" (MX 27.5" rear compatible) vs Norco Sight A3 MX 29"/27.5" mullet (MX)
- Fork travel (mm): Specialized Stumpjumper 15 Alloy 150 vs Norco Sight A3 MX 160
- Rear travel (mm): Specialized Stumpjumper 15 Alloy 145 vs Norco Sight A3 MX 150
- Suspension type: Specialized Stumpjumper 15 Alloy Horst-link (FSR) vs Norco Sight A3 MX High Pivot Horst-link
- Groupset: Specialized Stumpjumper 15 Alloy Shimano Deore M6100 vs Norco Sight A3 MX Shimano Deore
- Brake type: Specialized Stumpjumper 15 Alloy Shimano BR-MT420, 4-piston hydraulic disc vs Norco Sight A3 MX Shimano Deore MT520, 4-piston, 203/180mm rotors

## Sources

- Specialized Stumpjumper 15 Alloy: https://www.bikeradar.com/news/specialized-stumpjumper-15-alloy (bikeradar.com, verified 2026-08-01)
- Norco Sight A3 MX: https://www.bikeexchange.com/en-US/products/norco_sight_a3_mx_2025 (bikeexchange.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/mountain-bikes/specialized-stumpjumper-15-alloy-vs-norco-sight-a3-mx/
Cite: Per The Front Desk Review, Specialized Stumpjumper 15 Alloy ($3000) vs Norco Sight A3 MX ($3499) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/mountain-bikes/specialized-stumpjumper-15-alloy-vs-norco-sight-a3-mx/
License: CC BY 4.0.