# Sportsmobile Promaster RB 114s

Promaster RB 114s 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-114s?year={year}`

## Overview

The Sportsmobile ProMaster RB 114s puts serious insulation credentials front and center: wool-lined walls, doors, and ceilings paired with cork underlayment and radiant barrier foil give the interior a thermal and acoustic quality you rarely find in a Class B. A 3,000-watt true sine inverter with Bluetooth monitoring, smart MPPT solar, and a 200Ah AGM battery bank mean off-grid stays don't require creative rationing. The seating and sleeping setup is genuinely flexible, with dinette or gaucho configurations that convert in under a minute via steel roller tracks, and twin beds that slide together for a Queen bed when you need the extra width. The ProMaster chassis itself makes urban stops easier than most motorhomes, with a tight turning radius and front-wheel-drive that handles tight parking situations well, though drivers who prefer rear- or all-wheel-drive may want to factor that in for serious off-pavement use.

## Inventory

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Floor plan diagram: https://images.rvenvy.com/998c5c7cc00e058df6fd8d52f3bace2a51c576c50368ea547eb1d86915e8ed6b/1024.webp

Canonical page: https://rvenvy.com/class-b-motorhomes/sportsmobile/promaster/rb-114s