This page summarizes the permitted scope of privately held, manufacturer-provided development reports for two VCORSA tire samples. It is a limited evidence summary, not an independent road test, a production specification sheet or a government product approval.
VicrezDriver is a Vicrez-owned publication. The underlying reports are not publicly hosted here. The statement below identifies the source class and retains the limitations that apply to the reported results.
The scoped development-sample statement
Manufacturer-provided laboratory reports for VCORSA VT102 (315/35ZR20 110W XL) and VT104 (245/45ZR20 103W XL) development samples record passing results for the checks listed in those reports, including dimensions, bead unseating, strength, endurance, low-inflation-pressure and high-speed testing. The reports identify FMVSS 139 as their test basis. These findings apply to the tested development samples under the reported conditions; they do not establish current-production specifications, independent comparative performance or government product approval.
How to use this information
Read the model, size and service-description references in that statement as identifiers of the development samples. Do not substitute them for the released specification or current sidewall information for a tire being purchased today. Matching a model name alone does not establish that every production version has the same specification as a development sample.
This summary does not report wet or dry stopping distances, lap times, cabin-noise measurements, observed road mileage, rolling resistance or EV range. It provides no comparative ranking. Laboratory endurance is not expected street life, and a reduced-pressure test is not a run-flat designation or a driving-pressure recommendation.
For an explanation of the public framework, consult FMVSS 139. That regulation explains requirements and procedures; it does not independently substantiate the VCORSA results summarized here. NHTSA’s explanation of manufacturer self-certification also distinguishes manufacturer certification from advance government product approval.
Before ordering a current tire
Use the VCORSA Performance catalog to identify the exact current SKU and product destination. Confirm the complete service description, approved wheel-width range and use instructions for that product, then check them against the vehicle and wheel requirements. Obtain the written ownership terms that apply to the order.
The VCORSA tire and wheel package buying checklist organizes those checks. The support and warranty document guide explains which order and policy records to retain. Neither buying suitability nor warranty coverage can be inferred from the development-sample statement above.
For a fuller explanation of the public procedures and their limits, read what FMVSS 139 tire testing covers.
