WenmarOpen by Wenmar Pro

Service bulletin No. 39-20

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10180468
Published by NHTSA2020-10-01
Manufacturer's numberNo. 39-20
Manufacturer's date2020-09-08
NHTSA componentWHEELS

NHTSA's summary

List of approved wheels and tires for the 718 GT4 and Spyder models.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Wheels

Vehicles listed
PORSCHE CAYMAN2020
PORSCHE redundant BOXSTER2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.