# Sportsmobile Promaster RB 112s

Promaster RB 112s is a class b floor plan by Sportsmobile.

## Specs (2026 model year)

| Spec | Value |
| --- | --- |
| Length | 17 ft 9 in |
| Sleeps | 2 |

## Model years

2026. Year-specific specs: `https://rvenvy.com/class-b-motorhomes/sportsmobile/promaster/rb-112s?year={year}`

## Overview

Sportsmobile built the ProMaster RB 112s around insulation in a way most Class B conversions skip entirely, layering cork underlayment, wool-lined walls and ceiling, radiant barrier foil, and magnetic arctic panels for the windshield and doors into a van that handles genuine four-season use. The galley is modest but functional, with a Norcold 12V refrigerator, pull-out faucet sink, 10-gallon fresh water tank, and city water hookup already plumbed in. A 3,000-watt true sine inverter charger and a smart MPPT solar controller with Bluetooth monitoring handle the electrical side, so you're not dependent on shore power. The ProMaster chassis earns points for easy maneuverability and a tight turning radius, making the Sportsmobile ProMaster RB 112s a genuinely livable rig that punches well above its footprint in cold-weather readiness.

## Inventory

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Floor plan diagram: https://images.rvenvy.com/9ada37917acaae6842633768f41166f4e53ba7585678e0216f19d2ef72cc0cc5/1024.webp

Canonical page: https://rvenvy.com/class-b-motorhomes/sportsmobile/promaster/rb-112s