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MOMO Prototipo 350mm Steering Wheel

From £264.59 Incl. VAT

Motorsport steering wheel, 350mm, 37mm shallow dish, in leather. Horn push included. Needs a car-specific boss kit, so tell us your car and we will match the right one.

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The Prototipo is the wheel that built MOMO’s name. Introduced in the early years of the company’s history, the three-spoke layout with the central MOMO logo has remained essentially unchanged because the design works: equal spokes at 10, 6 and 2 o’clock give a predictable grip around the entire rim, and the dish brings the wheel toward the driver without needing a spacer hub. This listing is for the 350 mm diameter version, the middle of the three Prototipo sizes.

Black leather with white stitching covers the grip; spoke finish is selectable from the variations, with both anodised black and brushed silver available. The dish measures 37 mm. The grip section is 30 mm wide and 29 mm tall, a near-circular cross section that suits both bare hands and driving gloves.

The fixing is six-bolt, 70 mm PCD, compatible with any MOMO, Sparco, OMP or Sabelt boss kit. The standard MOMO fixing screws (MOMM12941111111) suit this wheel with a regular boss kit; the spacer screws (MOMM12941111112) are needed only if a 15 mm hub spacer is in the installation.

The Prototipo 350 mm sits in the middle of the range. The 320 mm version suits tighter cockpits where a shorter reach is needed; the 370 mm version (VPRO370) suits larger vehicles or drivers who prefer more leverage. The Prototipo Heritage version offers the same dimensions with deliberately aged distressed leather. The Black Edition (VPROBLKED350R) is the all-black premium execution with laser-etched spokes.

The Prototipo is at its best in the modified road car it was designed for: a classic or retro vehicle where a period-correct Italian wheel fits the character of the interior, or a light track car where clear sightlines to the dash matter more than the features of a heavier sports wheel.

Additional information

Brand

Colour

Wheel Diameter

Wheel Dish Type

Wheel Dish Size

Grip Material

Stitching Colour

,

Spokes

Spoke Material

Spoke Colour

,

Centre Stripe

Horn

Buttons

Product Type

Steering wheel size and fitment guide

Three numbers decide whether a wheel works in your car: the diameter, the dish, and the bolt pattern. The bolt pattern is the easy one, because almost everything here shares it.

The bit that makes this simple: 6 x 70 mm PCDMOMO, OMP and Sparco all drill their wheels on a six bolt, 70 mm pattern, and so do the boss kits and quick releases that suit them. That means a MOMO wheel goes on an OMP boss, and a Sparco wheel goes on a MOMO boss. You are choosing on size and feel, not on compatibility.

Diameter

Every rim below is drawn at true relative size. Forty millimetres looks like nothing written down and is very obvious once you are sat behind it.

380340300260

Smaller means quicker and heavier. You turn less to get the same lock, and you work harder to do it, because you have less leverage at the rim. On a car without power steering that trade bites hard at parking speed and barely at all once you are moving.

Diameter Brands we stock What it suits
250 – 270 mm OMP, MOMO, Sparco, Reverie Single seaters and tight cockpits
280 – 300 mm MOMO, OMP, Sparco Race cars with quick racks
310 – 330 mm MOMO, OMP, Sparco, Sabelt Road-based track cars
340 – 350 mm MOMO, OMP, Sparco, Sabelt Closest to a standard road wheel
360 – 380 mm MOMO, OMP, Sparco Classics and cars with no power steering

350 mm is the most common size on the site by a distance, and it is the closest to what most cars left the factory with. If you are replacing a standard wheel and you are not chasing a specific change, that is the safe starting point.

Dish

Dish is how far the rim sits toward you from the mounting face. It is the number people forget, and it is the one that decides whether you can still get in and out of the car.

Dish type What it does When to pick it
Flat Level with the mounting face When you are adding a quick release
Shallow Slightly toward the driver A small adjustment
Semi Noticeably toward the driver Column set a long way forward
Deep Well toward the driver Classics with an upright column
Adding a quick release? Go flatterA boss kit and a quick release together add a real stack of depth between the column and the rim, and it all comes toward you. If you are fitting both, a flat or shallow dish wheel usually ends up in the right place. A deep dish on top of a quick release can put the rim in your chest, especially in a fixed back seat.

The exact dish figure in millimetres is listed on every product page under Wheel Dish Size, so you can compare like for like rather than going on the type name alone.

Spokes and grip

Spokes Typical use
2 spoke Classic and vintage cars. Clear view of the instruments
3 spoke The standard, and what almost everything here is
5 and 6 spoke Mostly styling. Popular on classic restorations

Grip material is mostly preference, with one practical point: suede and alcantara give the best feel in gloves and the worst life in a road car that lives outside. Leather is the sensible all-rounder. Wood and polyurethane are for classics, where the look is the point.

What else you need

A boss kit, always

An aftermarket wheel does not bolt to your column. A vehicle-specific boss kit adapts your column spline to the 6 x 70 mm pattern, and there is one for almost every car. Ours are listed by vehicle, so search your car and year.

A quick release, if you want one

The quick release sandwiches between the boss and the wheel, so you still need the boss. It makes getting in and out of a caged car far easier and it is worth having if you are climbing over a door bar. Remember the depth it adds when you pick the dish.

Horn and buttons

Some wheels come with a horn push and some do not, and it is listed on every product. If your car needs an MOT, check before you order rather than after.

Tell us the car and what you are trying to changeWhether you want it quicker, closer, further away or just tidier, plus whether a quick release is going on. Diameter and dish work together and it is easier to get both right in one go. Call 0115 989 3488 or email Sales@GSMPerformance.co.uk.

Diameters, dish types, spoke counts and materials are read from our own product data, checked 2 August 2026. The 6 x 70 mm PCD applies to the MOMO, OMP and Sparco wheels and boss kits we stock; the Reverie carbon wheels and some classic patterns differ, so check the product page.

Have you written anything about this exact product?
Yes, we have covered this exact product: New Momo Prototipo Steering Wheel, and The MOMO Prototipo steering wheel arrives for 2022. That is first-hand coverage from our own builds and showroom, not brochure copy.

Do I need anything else to fit this wheel to my car?
Yes, a boss kit (also called a hub). The Prototipo 350mm bolts to the standard 70mm six-bolt pattern shared by MOMO, OMP, and Sparco boss kits, but the boss kit itself is specific to your car’s steering column. Find yours in our boss kit range, or tell us your car and we will match it for you.

What does the 37mm shallow dish actually mean?
The dish is how far the rim sits towards you from the mounting face. A shallow 37mm dish brings the grip a little closer than a flat wheel, a mild correction that suits most road driving positions. If you are not sure which dish depth your driving position needs, our steering wheel dish guide walks through it.

Does it come with a horn button?
Yes, a centre horn push is included and wires into the boss kit. Extra buttons are not included.

What happens with my airbag and MOT?
None of our motorsport wheels carry an airbag. On a car that had one as standard, the dash light stays on after the conversion unless a bypass resistor is wired in, and an illuminated airbag light fails the MOT. Tell your insurer about the change too.

How do I look after the leather grip?
Leather is the most forgiving rim covering for daily use. An occasional wipe and a standard leather conditioner once or twice a year keeps it supple. No gloves needed.

Is 350mm the right size?
350mm is the standard road and rally size, close enough to most original wheels that the steering weight barely changes. Go smaller only if you have quick steering or need knee clearance, as a smaller rim makes low-speed steering noticeably heavier.

Can I use it with a quick release?
Yes. Any quick release made for the 70mm six-bolt pattern takes this wheel, and the quick release then mounts to your car-specific boss kit. See our quick release kits, or ask and we will spec the full stack for your car.

Availability

Stocked MOMO leaves in about two days

Whatever we are holding goes straight out, normally with you in around 2 days.

Imported from Italy, 3 to 4 weeks

Anything we bring in from Italy for your order usually takes 3 to 4 weeks.

Production only, around 8 weeks

Rarer parts, and boss kits for vehicles that see little demand, are not held anywhere and get made when they are ordered. Allow around 8 weeks for those.

If you are not sure which yours is

Contact us with the part and we will tell you which of the three it falls into before you buy.

MOMO Prototipo Heritage Tobacco steering wheel fitted in a right-hand-drive classic sports car

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Guides and advice

GuideNew MOMO Prototipo Steering Wheel: Now In A Smaller 320mm Size
GuideThe MOMO Prototipo Steering Wheel Arrives For 2022
GuideFlat, Semi Or Deep? The Definitive Guide To Steering Wheel Dish
GuideWhat Kit Do You Need For Your First Track Day?

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