Inflatable Dinghy Buyers Guide: RIB vs. Roll-Up vs. Air Floor

The inflatable dinghy is the unsung workhorse of the cruising fleet. It's how you get from anchor to shore, how you fetch groceries, how you explore shallow creeks. Yet most boaters buy whatever the dealer has in stock and regret it within a season. This guide compares the three main types — RIBs, roll-ups, and air-floor — and helps you choose based on how you'll actually use it.

The Three Types Explained

1. RIB (Rigid Inflatable Boat)

A RIB has a solid floor (fiberglass, aluminum, or composite) bonded to inflatable tubes. The rigid floor gives it the performance of a small powerboat — it planes, turns sharply, and handles rough water. The trade-off is weight and storage: a 10-foot RIB weighs 110-150 lbs and doesn't fold.

2. Roll-Up (Soft Floor with Removable Slats)

A roll-up has a flexible fabric floor with removable aluminum or wood slats that slide into sleeves. When deflated, it rolls into a bag the size of a large duffel. Performance is limited — the flexible floor flexes under power, preventing planing — but for short trips to the mooring, it's all you need.

3. Air-Floor (High-Pressure Inflatable Deck)

The newest category. An air-floor dinghy has a high-pressure (10 PSI) inflatable floor bonded to the tubes. It's almost as rigid as a RIB when inflated, but deflates and rolls up like a roll-up. The trade-off is durability — the air floor is more vulnerable to punctures than a rigid floor, and repairing it in the field is harder.

Comparison Table

Best Overall: AB Aluminum 10VS RIB

The AB 10VS is the gold standard for yacht tenders. The aluminum floor is lighter than fiberglass (110 lbs vs. 145 lbs for the equivalent fiberglass model), doesn't absorb water, and resists damage from beach landings better than any other floor type. The Hypalon tubes (vs. PVC on cheaper models) last 15-20 years in tropical UV — PVC lasts 5-8 years.

Specs

Best Value: West Marine RU-260 Roll-Up

If you only use a dinghy twice a week for short runs to shore, a RIB is overkill. The West Marine RU-260 is a 9-foot roll-up with a slat floor that stows in a 30" x 18" x 14" bag. At $899, it's a quarter the cost of a RIB and takes up a tenth of the storage space.

The trade-off is performance — with a 3.5 HP outboard, expect 5 knots flat-out, no planing. For getting from your anchored sailboat to the dock 200 yards away, that's fine. For exploring a coastline, it's frustrating.

Best Air-Floor: Zodiac Cadet 310 Aero

The Zodiac Cadet 310 Aero represents the best of both worlds for cruisers who don't have davits but want better-than-roll-up performance. The high-pressure air floor inflates to 10 PSI (110 kPa) in about 8 minutes with the included pump, and the resulting surface is firm enough to plane with a 9.8 HP outboard.

Outboard Pairing Guide

// Dinghy / outboard pairing calculator
interface DinghySpec {
  length_ft: number;
  weight_lb: number;
  floor_type: "rigid" | "slat" | "air";
  max_hp: number;
}
 
interface OutboardSpec {
  hp: number;
  weight_lb: number;
  price_usd: number;
}
 
function recommendOutboard(dinghy: DinghySpec): OutboardSpec[] {
  // To plane: 1 HP per 25-30 lbs of (boat + 2 adults + gear)
  const crewWeight = 350; // 2 adults
  const gearWeight = 50;
  const totalWeight = dinghy.weight_lb + crewWeight + gearWeight;
  const minHpToPlane = Math.ceil(totalWeight / 28);
 
  const options: OutboardSpec[] = [
    { hp: 2.5, weight_lb: 37, price_usd: 700 },   // Tohatsu 2.5
    { hp: 3.5, weight_lb: 41, price_usd: 850 },   // Tohatsu 3.5
    { hp: 6, weight_lb: 55, price_usd: 1400 },    // Tohatsu 6
    { hp: 9.8, weight_lb: 81, price_usd: 2100 },  // Tohatsu 9.8
    { hp: 15, weight_lb: 108, price_usd: 2800 },  // Tohatsu 15
    { hp: 20, weight_lb: 126, price_usd: 3500 },  // Tohatsu 20
  ];
 
  return options.filter(o => o.hp <= dinghy.max_hp).map(o => ({
    ...o,
    will_plane: o.hp >= minHpToPlane,
    min_hp_to_plane: minHpToPlane,
  } as any));
}
 
const abRib: DinghySpec = {
  length_ft: 10.2,
  weight_lb: 110,
  floor_type: "rigid",
  max_hp: 15,
};
 
console.log(recommendOutboard(abRib));
// 9.8 HP and 15 HP options will plane; smaller motors are displacement-only

Storage & Davit Considerations

The most overlooked factor in dinghy selection is how you'll store it. A 10-foot RIB weighs 110-150 lbs — too heavy to lift onto a foredeck alone, too bulky to fit in most lazarettes. Options:

• Davits (stern-mounted crane arms): The standard solution for 30+ foot yachts. Costs $2,000-$4,000 installed, but lets you store the dinghy out of the water with the outboard attached.
• Deck chocks: For sailboats with clear foredecks. The dinghy lives upside-down on the cabintop. Adds 200+ lbs to the boat's center of gravity.
• Deflated storage: Only practical for roll-ups and air-floors. Takes 20 minutes to inflate at the destination — fine for occasional use, maddening for daily.

Final Verdict

For daily yacht tender use, the AB Aluminum 10VS RIB is the right answer — it's the lightest, most durable, and best-performing dinghy in its class. For occasional use or boats with no davits, the West Marine RU-260 Roll-Up does 80% of the job at 25% of the price. And for cruisers who want performance but can't store a RIB, the Zodiac Cadet 310 Aero is the best compromise on the market.