Piaggio 4146115 Rear Brake Shoes Ø150x24 – Vespa 50 Special, 90, Primavera and ET3

The Piaggio 4146115 rear brake shoes are the original pair for the Ø 150 × 24 mm rear drum of smallframe Vespas with 10-inch wheels: Vespa 50 Special, Vespa 90 and 90 SS, Vespa 125 Primavera and Vespa 125 ET3. Lightweight alloy body with pre-bonded friction material, ready for installation. Product code 4146115.

✓ Strengths

• Original Piaggio spare part – this is the 4146115 code specified for these Vespas, not an aftermarket equivalent with its own code.
• Complete pair – the package contains both rear drum brake shoes: everything needed to overhaul a vehicle's brake.
• 150 × 24 mm size – the diameter of the rear drum of 10″ wheel smallframes: no re-machining, no adaptation.
• Lightweight alloy body – ribbed casting with embossed markings, dark friction material bonded over the entire surface.
• Pre-equipped ends – the galvanized metal elements on the cam side are mounted: simply slide the shoes on and re-attach the springs.

Technical features

Vehicle compatibility

The drum size (150 mm) and the 10″ wheel are the most reliable references for verification. If you have any doubts, send us your Vespa's frame number and we will verify the correct code for you.

Who is this perfect for?

It's the spare part for anyone who keeps a Vespa 50 Special, a 90, a Primavera, or an ET3 on the road and notices that the pedal travel has lengthened, the rear brake squeals, or it only brakes at the very end: if the drum is still within tolerance, a pair of original brake shoes will restore the braking to its original performance. It's for restorers who want the specific Piaggio code from the catalog, not an equivalent, and for workshops that overhaul vintage smallframes and prefer to install parts with the same geometry and friction material as the original equipment.

Frequently Asked Questions

Which Vespas do the Piaggio 4146115 brake shoes fit?
The 4146115 brake shoes are intended for the rear brake of smallframe Vespas with 10-inch wheels and a 150 mm drum: Vespa 50 Special, Vespa 90 and 90 SS, Vespa 125 Primavera and Vespa 125 ET3. The table above lists models and years; the decisive reference is the drum size.

Where exactly are they located on the vehicle?
They operate inside the rear brake drum, on the wheel hub. They expand against the inner track of the drum when the cam actuated by the pedal pushes them, and return to rest thanks to the return springs. To replace them, you remove the rear wheel and slide off the drum.

How many brake shoes are needed and what does the package contain?
Two are needed, and the package contains both: the rear drum uses a pair of opposing brake shoes. With this item, you have everything necessary to overhaul a vehicle's rear brake. Return springs are not included: if they are worn or rusty, they should be replaced separately.

Are they also suitable for the front brake?
No. The 4146115 code is only for the rear brake. The front brake shoes for the same Vespas have a different Piaggio code and are not interchangeable with these: installing the wrong size will prevent proper drum closure or reduce the braking surface. If you also need the front, write to us with your frame number.

Are these original Piaggio parts or an aftermarket equivalent?
These are original Piaggio spare parts with code 4146115, new and never fitted, the same as specified by the manufacturer for these Vespas. They are not an equivalent with their own code: the profile of the lightweight alloy body, coupling dimensions, and friction material are identical to the original equipment. They are shipped from Italy with an invoice.

How can I be sure these are the right ones for my Vespa?
Look at the wheel: these brake shoes are for smallframes with 10-inch wheels and a 150 mm rear drum. Vespa 50s with 9-inch wheels, such as the 50 N, L, R, and early series Special, use different size brake shoes. If in doubt, measure the inner diameter of the drum or send us your frame number: we will verify it for you.