DEXTER RACING 8-inch CNC Aluminum Rim – Split and Tubeless
Classic split Vespa rim meets modern tubeless technology
The DEXTER RACING 8-inch aluminum rim combines the classic two-piece design of early Vespa rims with modern tubeless technology. Both rim halves are CNC-machined from solid aluminum and sealed together with an O-ring. This allows the rim to remain disassemblable while still being compatible with a suitable tubeless tire.
The design is intended for classic Vespa Wideframe and Largeframe models with a closed 8-inch wheel mount. It can be used on both the front and rear wheels and also serves as the base component for the DEXTER RACING 8-inch disc brake set DEX20158.
8 inches
Tubeless
CNC aluminum
Split rim
O-ring seal
Front and rear
Wideframe and Largeframe
For DEX20158
The advantages at a glance
Tubeless design: designed for use with a suitable 8-inch tubeless tire
Split construction: the classic two-piece rim design is retained
O-ring seal: the joint between the two rim halves is reliably sealed
CNC-machined: both rim halves are machined entirely from solid aluminum
Front and rear: suitable for both wheel positions
Wide vehicle compatibility: fits numerous Vespa models from 1946 to 1967 with a classic closed 8-inch wheel mount
Disc brake-compatible: base component for the DEXTER RACING DEX20158 disc brake
Patented design: Combination of a disassemblable rim and tubeless construction
CNC-milled from solid aluminum
Unlike classic Vespa rims, which are stamped from sheet steel, the two rim halves are CNC-machined entirely from solid aluminum. This allows for precise machining of the contact, centering, and sealing surfaces.
The result is a technically advanced rim that retains the characteristic two-piece design of the original Vespa 8-inch rim, yet features a thoroughly modernized construction.
Classic design – modern construction
Two-piece design based on the principle of the classic Vespa rim
Both rim halves are made from solid aluminum
Precise CNC machining of the functional and sealing surfaces
Tubeless design despite the split construction
Classic 8-inch wheel size is retained
Split rim with tubeless technology
Classic Vespa rims consist of two rim halves bolted together. This design is exceptionally service-friendly, but in its original form requires an inner tube.
DEXTER RACING combines this proven principle with modern tubeless technology. An O-ring seal is positioned between the two rim halves, sealing the joint after the rim halves are bolted together.
This means the rim remains disassemblable, just like the original Vespa rim, but can be used with a suitable 8-inch tubeless tire.
Split yet tubeless
Two rim halves: classic detachable design
O-ring: Seals the joint between the two rim halves
TL / Tubeless Type: designed for tubeless tires
8-inch size: the classic wheel diameter is retained
Base for the DEXTER RACING 8-inch disc brake
The rim also serves as the ideal base component for the DEXTER RACING DEX20158 disc brake kit. This allows for the installation of a modern disc brake system even on classic Vespa models with 8-inch tires.
The key advantage: The characteristic 8-inch wheel size is preserved. A major conversion of the vehicle to 10-inch wheels is not required for the corresponding DEXTER RACING 8-inch brake system.
This is particularly appealing for early Wideframe and Largeframe models, where the proportions, vehicle height, and classic 8-inch look are intentionally preserved.
Ideal for classic 8-inch conversions
Original 8-inch wheel size is retained
No need to switch to 10-inch tires
Compatible rim base for the DEXTER RACING DEX20158 disc brake
Suitable for front and rear wheels
Complements the classic look of early Vespa models
Compatible with
The following compatibility information applies to Italian Piaggio models with the classic closed 8-inch wheel mount. For clear identification, compare the frame prefix on the vehicle with the table.
| Model |
Frame prefix |
Model Year |
Frame Number |
| Vespa 98 |
V98 |
1946–1947 |
1–18079 |
| Vespa 125 |
V1T–V15T |
1948–1950 |
1–104096 |
| Vespa 125 |
V30T–V33T |
1950–1952 |
104097–251820 |
| Vespa 125 |
VM1T |
1952–1953 |
1001–85870 |
| Vespa 125 U |
VU1T |
1953 |
1001–7001 |
| Vespa 125 |
VM2T |
1953–1954 |
85871–176014 |
| Vespa 125 |
VN1T |
1954–1955 |
1001–50100 |
| Vespa 125 |
VN2T |
1956–1957 |
50101–125600 |
| Model |
Frame prefix |
Year of Manufacture |
Frame Number |
| Vespa 150 |
VL1T |
1954–1955 |
1001–17000 |
| Vespa 150 |
VL2T |
1955–1956 |
17,001–93,101 |
| Vespa 150 |
VL3T |
1956–1957 |
93102–132737 |
| Vespa 150 |
VB1T |
1957–1958 |
1001–99700 |
| Model |
Frame prefix |
Year of Manufacture |
Frame Number |
| Vespa 125 VNA |
VNA1T |
1957–1958 |
1001–68031 |
| Vespa 125 VNA |
VNA2T |
1958–1959 |
68032–116431 |
| Vespa 125 VNB |
VNB1T |
1959–1961 |
1001–89850 |
| Vespa 125 VNB |
VNB2T |
1961 |
1001–34699 |
| Vespa 125 VNB |
VNB3T |
1961–1962 |
34700–90395 |
| Vespa 125 VNB |
VNB4T |
1962–1963 |
90396–136485 |
| Vespa 125 VNB |
VNB5T |
1963–1964 |
1001–43240 |
| Vespa 125 VNB |
VNB6T |
1964–1966 |
1001–37028 |
| Model |
Frame prefix |
Year of Manufacture |
Frame Number |
| Vespa 150 VBA |
VBA1T |
1958–1960 |
1001–125040 |
| Vespa 150 VBB |
VBB1T |
1960–1962 |
1001–146,000 |
| Vespa 150 VBB |
VBB2T |
1962–1967 |
146001–280148 |
The years listed indicate the production period. The date of first registration may differ from this. The frame prefix, wheel mounting, and existing rim type are decisive for classification.
Important Distinctions for Vehicle Classification
Closed 8-inch wheel mounting: This classification applies to the classic internally bolted rim design of the listed models.
Vespa 125 Super VNC1T: Although it comes standard with 8-inch tires, it is not included in this classification because it uses a different, open rim design.
Vespa 150 Super VBC1T: Also not included in this classification because the wheel mounting differs from the classic closed Wideframe/VNA/VNB/VBA/VBB design.
10-inch models: Not intended for vehicles with standard 10-inch wheel mounts.
Licensed models: For ACMA, Hoffmann, Messerschmitt, and other licensed models, the actual wheel mount must be verified before ordering.
Technical Specifications
| Manufacturer |
DEXTER RACING |
| Part |
Rim for front or rear wheel |
| Rim size |
8 inches |
| Design |
Two-piece and disassemblable |
| Tire type |
TL / Tubeless Type |
| Material |
Aluminum |
| Manufacturing |
Both rim halves are CNC-machined from solid material |
| Sealing |
O-ring between the rim halves |
| Color |
Silver |
| Installation position |
Front and rear |
| Wheel Mount |
Classic closed 8-inch design for the listed models |
| Vehicle group |
Vespa Wideframe and early Largeframe models with compatible 8-inch wheel mounting |
| Disc Brake Compatibility |
Base component for DEXTER RACING DEX20158 |
| Design |
Patented |
Important notes before installation
Compare the frame prefix and existing wheel mount with the vehicle chart
Check the O-ring and sealing surfaces for damage and contamination before installation
Assemble the rim halves cleanly, evenly, and without tension
Use only a tubeless 8-inch tire suitable for the rim
Follow the rim and tire manufacturers’ specifications regarding installation, air pressure, and permissible tire size
When using with the DEXTER RACING disc brake, verify the compatibility of all components of the brake assembly
After installation, check for proper tire seating, free rotation, and airtightness
Conclusion
The DEXTER RACING 8-inch tubeless rim is a technically sophisticated solution for classic Vespa Wideframe and early Largeframe models. It retains the characteristic two-piece 8-inch design but combines it with a solid aluminum CNC-machined construction and modern tubeless tire technology.
It is particularly appealing for vehicles where the classic 8-inch wheel size is to be retained. As a compatible base component for the DEXTER RACING DEX20158 disc brake, it also enables a modern brake upgrade without having to convert the vehicle to 10-inch wheels.
FAQ on the DEXTER RACING 8-inch Tubeless Rim
Yes. The rim is designed as a TL (tubeless) type and is engineered for use with a suitable tubeless 8-inch tire.
There is an O-ring seal between the two rim halves. It seals the joint where the rim halves are bolted together for tubeless operation.
Yes. For the listed Vespa models, the rim is intended for use on both the front and rear wheels.
The key identifier is the prefix stamped into the frame before the sequential serial number, such as VNB4T or VBB2T. This frame prefix should be compared with the vehicle table. The date of initial registration alone is not always sufficient for unique identification.
Although the Vespa 125 Super VNC1T and Vespa 150 Super VBC1T come standard with 8-inch wheels, they use a different open-spoke rim design. These models are therefore not included in the vehicle compatibility list provided here.
Various licensed models use a comparable closed 8-inch wheel mount. Due to possible differences between model series, countries of manufacture, and vehicles that have already been modified, the existing wheel mount should be compared with the DEXTER RACING version before ordering.
The rim is the compatible 8-inch base component for the DEXTER RACING disc brake set DEX20158. This allows the disc brake system to be installed while retaining the classic 8-inch tire size.
Both rim halves are CNC-machined entirely from solid aluminum. It is not a conventionally pressed steel rim.
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