# Jayco Seismic 4125

4125 is a fifth wheel floor plan by Seismic (Jayco).

## Specs (2021 model year)

| Spec | Value |
| --- | --- |
| Length | 45 ft 8 in |
| Sleeps | 7 |
| Slide-outs | 0 |
| Dry weight | 15,708 lbs |
| MSRP | $116,737 |

## Model years

2021. Year-specific specs: `https://rvenvy.com/fifth-wheel-trailers/jayco/seismic/4125?year={year}`

## Overview

At 46 feet, the Seismic 4125 gives you serious square footage to work with, and the layout makes smart use of it — the kitchen design keeps the cooking area focused and functional rather than sprawling. Hardwood cabinet doors and a smooth slide mechanism are genuine highlights that owners consistently praise. That said, this is a floor plan where a thorough pre-delivery inspection really pays off, as fit and finish on hardware has been inconsistent across model years. If you're cross-shopping toy hauler fifth wheels in this size range, it's worth having a checklist ready before you sign.

## Inventory

2 units currently for sale priced at $57,995: https://rvenvy.com/fifth-wheel-trailers/jayco/seismic/4125/inventory

Floor plan diagram: https://images.rvenvy.com/c5a95a6774b49ed360a90ef04999015aa29d77a9720a1433efb5b8faf24ce6d9/1024.webp

Canonical page: https://rvenvy.com/fifth-wheel-trailers/jayco/seismic/4125