# Forest River Flagstaff Hard Side T21HSB

T21HSB is a popup floor plan by Flagstaff Hard Side (Forest River).

## Specs (2027 model year)

| Spec | Value |
| --- | --- |
| Length | 18 ft 5 in |
| Sleeps | 4 |
| Slide-outs | 0 |
| Dry weight | 2,528 lbs |
| GVWR | 3,365 lbs |

## Model years

2027, 2026, 2025. Year-specific specs: `https://rvenvy.com/popup-campers/forest-river/flagstaff-hard-side/t21hsb?year={year}`

## Overview

This hard-sided popup stands out with a complete full bathroom, eliminating the need for campground facilities or porta-potties that many popup owners deal with. The solid walls provide better insulation and weather protection than traditional canvas popups, while still maintaining the compact storage profile. At just 3,365 pounds, it tows easily behind most vehicles yet sleeps four comfortably when expanded.

## Inventory

1 unit currently for sale: https://rvenvy.com/popup-campers/forest-river/flagstaff-hard-side/t21hsb/inventory

Floor plan diagram: https://images.rvenvy.com/e06a59040731848fa45649f07db57b0b9ba1f43114caa93e918f1b81f8c6a27d/1024.webp

Canonical page: https://rvenvy.com/popup-campers/forest-river/flagstaff-hard-side/t21hsb