# Sportsmobile Promaster 138S

138S is a class b floor plan by Promaster (Sportsmobile).

## Specs (2026 model year)

| Spec | Value |
| --- | --- |
| Length | 17 ft 9 in |
| Sleeps | 2 |
| Slide-outs | 0 |

## Model years

2026. Year-specific specs: `https://rvenvy.com/class-b-motorhomes/sportsmobile/promaster/138s?year={year}`

## Overview

Built on the highly maneuverable ProMaster chassis, this compact Class B delivers what owners consistently praise: easy driving with a tight turning radius that makes city navigation effortless. The 18-foot length includes a full bath while maintaining the platform's reputation for comfortable riding and good fuel economy. Sportsmobile's thoughtful use of limited space creates a well-designed layout that appeals particularly to couples who want the freedom of a smaller, more agile motorhome.

## Inventory

No units currently for sale. Search similar inventory: https://rvenvy.com/inventory

Floor plan diagram: https://images.rvenvy.com/5b817fe85feac21ad118bc2388cc8dc3e144dff553258a2129f325344cda1105/1024.webp

Canonical page: https://rvenvy.com/class-b-motorhomes/sportsmobile/promaster/138s