# Sportsmobile Promaster RB 115s

Promaster RB 115s 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-115s?year={year}`

## Overview

The Sportsmobile Promaster RB 115s is built around a layered insulation system that goes well beyond typical van conversions: cork underlayment underfoot, wool lining on the walls, doors, and ceiling, radiant barrier foil throughout, and magnetic arctic panels for the windshield and doors. That adds up to a genuinely four-season rig. The galley is compact but thoughtfully equipped, with a Norcold 12V fridge, a pull-out faucet, a 10-gallon fresh water tank with city hookup, and a 3,000-watt true sine inverter charger, all managed through a Bluetooth-connected solar and battery system. Seating and sleeping come down to how you spec it out, with dinette, gaucho, and couch configurations available, each converting to sleeping arrangements in about a minute via steel roller track cushion slides. The Ram ProMaster chassis underneath gives the Sportsmobile Promaster RB 115s a tight turning radius and front-wheel-drive confidence that owners consistently praise for both city errands and longer road trips.

## Inventory

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Floor plan diagram: https://images.rvenvy.com/6defd449301f582239a5267127548b9be24200929b6b02b710507be1789d6342/1024.webp

Canonical page: https://rvenvy.com/class-b-motorhomes/sportsmobile/promaster/rb-115s