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DEXTER RACING Item number: DEX20158

Front Disc Brake Set - DEXTER RACING Classic - Vespa 8-inch Large Frame VBA, VBB, VNB, Wide Frame/Faro Basso

Name: Front Disc Brake Set - DEXTER RACING Classic - Vespa 8-inch Large Frame VBA, VBB, VNB, Wide Frame/Faro Basso
Brand: DEXTER RACING
SKU: DEX20158
Price: 699.00 EUR
Availability: InStock

Important: 8 inches only with Dexter conversion rims DEX20163 or DEX20164

Not compatible: Stock rims and standard aluminum rims from other manufacturers

System: Disc instead of drum at the front

Disc: Ø 158 mm

Mounting: Radial for 4-piston calipers, without caliper

Feature: Integrated anti-dive

Compatible: Speed sensor and wheel cap

Installation: No fork or fender modifications required

Conversion: reversible

699,00 €*

available immediately

Shipping weight 2,94 kg

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Description
Suitable vehicles

DEXTER RACING Classic Front Disc Brake Set for Vespa VBA/VBB/VNB and Faro Basso

Compatible with classic Vespa models featuring VBA/VBB/VNB forks, as well as Wideframe and Faro Basso forks with the headlight mounted below—including select licensed models such as ACMA, Hoffmann, Motovespa, and Douglas.

Important: 8-inch only with Dexter conversion rim

If you wish to retain the original 8-inch tires, a compatible Dexter conversion rim is required: DEX20163 or DEX20164; see Accessories. This disc brake cannot be combined with stock rims or standard aluminum aftermarket rims from other manufacturers.

The DEXTER RACING Classic front disc brake kit is a modern solution for early Vespa forks: significantly greater braking power, more stability on rough roads, and reduced front-end dive during braking. The conversion is designed so that the original fork and fender remain unchanged, and the conversion is reversible. Important when choosing wheels: When using 8-inch tires, the set works exclusively with the matching Dexter conversion rims.

Disc instead of drum brake in the front Integrated anti-dive CNC solid-material swingarm Speedometer drive compatible Compatible with hubcaps No fork or fender modifications required Fully reversible 8 inches only with Dexter rim Brake caliper not included

Important: 8-inch tires are only compatible with Dexter conversion rims DEX20163 or DEX20164; see accessories

Cannot be combined with stock rims or standard aluminum rims from other manufacturers

Swingarm made of high-strength aluminum alloy, fully machined from solid

Brake disc Ø 158 mm for significantly greater deceleration and fade resistance

Radial mount for 4-piston calipers; calipers not included

Integrated anti-dive: revised geometry reduces dive

Compatible with the original speedometer drive via speedometer cable

Compatible with the original wheel cap / borchia; original appearance is preserved

No modifications to the original fork or fender required

Fully reversible; can be converted back at any time

Important for 8-inch tires: a compatible Dexter rim is required

The original 8-inch tires can be retained if a compatible Dexter conversion rim is used.

Compatible rims: DEX20163 or DEX20164; see Accessories.

The original stock rim is not compatible with this brake system.

Standard aluminum aftermarket rims from other manufacturers are also not compatible with this brake.

Important: Supplied without brake caliper – Recommendation

Recommendation: bgm PRO brake caliper BGM2506TTB, 4-piston, radial—robust, easy to modulate, and suitable for high-performance conversions.

For a complete conversion, additional components such as a hydraulic control unit(e.g., master cylinder), brake lines, and small parts are required, depending on the vehicle and setup.

Application

Conversion of the classic front brake to a disc brake on early Vespa fork models

For touring, everyday use, and performance-tuned engines

Greater safety in wet conditions, on cobblestones, and on poor roads

Original appearance is largely preserved thanks to the wheel cap and speedometer drive

With 8-inch tires, compatible only with Dexter conversion rims DEX20163 or DEX20164

Concept and Riding Experience

Integrated anti-dive: less front-end dive, more stable front end when braking

Revised geometry: better handling and more control on uneven surfaces

Significantly higher braking performance and better fade resistance than drum brakes

Reversible: Conversion without irreversible frame or fork modifications

Technical Highlights

Swingarm: high-strength aluminum alloy, machined from solid

Brake disc: Ø 158 mm

Caliper mount: radial, designed for 4-piston calipers; caliper not included

Anti-dive: integrated, with revised spring and damper geometry

Speedometer: compatible with original speedometer cable, cable-driven

Appearance: compatible with original wheel cap

Installation: No modifications to the original fork or original fender required

Reversion: fully reversible

8 inches: only with Dexter conversion rims DEX20163 or DEX20164; not compatible with stock rims or aftermarket aluminum rims

SC Expert Insight: Why Anti-Dive Makes Such a Big Difference on Early Forks

Due to their design, early Vespa front forks dive significantly during heavy braking. This alters the trail and wheel load—making the front end less stable.

The integrated anti-dive design reduces this movement, keeping the front end more stable and allowing you to modulate braking force more effectively, especially on uneven surfaces.

Important before purchasing: Check your fork type and rim

This set is designed for VBA/VBB/VNB fork types as well as Wideframe and Faro-Basso forks. For modified vehicles or mixed configurations, please check the installed fork type in advance. Additionally: If you want to keep the original 8-inch tires, you’ll need a compatible Dexter conversion rim (DEX20163 or DEX20164 ). The brake cannot be combined with stock rims or aluminum rims from other manufacturers.

Compatible Vehicle Models (Selection)

Typical model families and type codes are listed. For licensed models and imported models, the fork and swingarm design is decisive.

Piaggio Vespa Largeframe – early model series VNA / VNB / VBA / VBB

Vespa 125 VNA, for example VNA1T, VNA2T

Vespa 125 VNB, for example VNB1T through VNB6T

Vespa 150 VBA, VBA1T

Vespa 150 VBB, VBB1T, VBB2T

VNA1TVNA2T VNB1TVNB2TVNB3TVNB4TVNB5TVNB6T VBA1T VBB1TVBB2T

Vespa Wideframe and Faro Basso – classic models

Vespa 98/125 Wideframe, for example V1T–V15T, V30T–V33T, VU1T, VM1T/VM2T, VN1T/VN2T

Vespa 150 Wideframe, for example VL1T–VL3T, VB1T, VGL1T

V1T–V15T V30T–V33T VU1T VM1TVM2T VN1TVN2T VL1TVL2TVL3T VB1T VGL1T

Note: “Faro Basso” refers to models with a low-mounted headlight, i.e., the light is at the bottom.

Licensed models and imported models—examples: ACMA, Hoffmann, Motovespa, Douglas

ACMA France: ACMA 125, early wide-frame generation, ACMA 150 GL depending on the version

Hoffmann, Germany: Hoffmann-Vespa 125, A/B based on the wide-frame design

Motovespa, Spain: for example, Motovespa 125 N based on the wide-frame design, depending on the year of manufacture

Douglas UK: including the Sportique, a series with VNA/VNB/VBA/VBB fork types

Since licensed models may have slightly different specifications, we recommend verifying the model code and fork type if you are unsure.

FAQ – Frequently Asked Questions About the DEXTER RACING Classic Disc Brake Kit

Does the kit fit with 8-inch tires?

Yes, the original 8-inch tires can be retained, but only with a compatible Dexter conversion rim. You’ll need DEX20163 or DEX20164; see Accessories. The brake cannot be combined with stock rims or standard aftermarket aluminum rims from other manufacturers.