A directional arrow tells the installer which way a tire must roll when the vehicle moves forward. OUTSIDE identifies the sidewall that must face away from the vehicle. Check these as separate instructions before deciding where a tire belongs.
For VCORSA owners, the useful starting point is the exact tire in front of you: its model, full size and actual molded markings. A tread photo or a product-family name cannot answer every mounting question. Use this guide to prepare a clear record for a qualified tire professional.
Read the arrow and the sidewall wording separately
An arrow associated with a rotation instruction concerns rolling direction. OUTSIDE or INSIDE wording concerns the tire’s orientation across the vehicle. Neither is a shortcut for approving the complete tire, wheel and vehicle combination.
This distinction is documented in Porsche’s mounting-marking explanation on page 3 of bulletin 67/21, which also describes tires carrying both types of instruction. That bulletin covers specified 2005–2008 Boxster/Cayman applications; its fitment tables do not approve VCORSA tires for those vehicles.
| Marking you find | What to have confirmed | Useful question for the installer |
|---|---|---|
| A rotation-direction arrow | Correct rolling direction during forward travel | “Can you show me how this arrow applies at this wheel position?” |
| OUTSIDE or INSIDE | Correct outward and inward sidewall | “Which side of this exact tire belongs away from the vehicle?” |
| Both types of instruction | Both requirements together | “Does this position satisfy every marking on this tire?” |
| Wording you cannot read or identify | The actual manufacturer’s instruction | “Please identify this before deciding how to mount or move the tire.” |
An asymmetric tread has different inner and outer portions. The practical mounting check is the prescribed sidewall orientation. For an OEM example, Tesla’s Model Y manual directs that tires marked OUTSIDE have that sidewall facing outward. This explains the wording, rather than establishing suitability for another vehicle.
What our VCORSA reference photo actually shows
The supplied, unaltered VCORSA product photo above shows INSIDE near the lower-right portion of the sidewall. That is the side being photographed; it is not a photograph of a tire installed on a vehicle. The separate arrow and OUTSIDE cards in the article’s header illustration explain concepts and are not additional markings on this tire.
Use a real photograph of your own tire for a service question. Include one wider image to establish which tire you photographed, then a readable close-up of the relevant wording. Keep the images together so a close-up cannot become detached from its tire identity. If the opposite side is inaccessible, ask the shop to document it during service; do not crawl under an unsupported vehicle.
For the size, load and speed information beside these markings, use our tire-size and sidewall guide. Copy the complete designation from each tire, rather than assuming that every tire in a set has the same specification.
Why grooves that look different need a closer check
A concern such as “the left and right tread look different” is worth bringing to the installer. Make the question specific: identify the tire, its current corner and the markings you can actually read. Ask the shop to reconcile those observations with the applicable instructions.
Do not change a mounting decision just to make two tread photographs look alike. Equally, do not dismiss an apparent mismatch because the tire was recently installed. Leave the issue open until the professional can explain the relevant markings and confirm the installation.
Rolling direction and maintenance rotation are different
The tire rolling as the car travels is one meaning of rotation. Moving tires between vehicle positions as maintenance is another. A correct mounting orientation is only part of deciding whether a proposed position change is suitable.
USTMA explains that directional or asymmetric designs and different front/rear sizes can restrict ordinary rotation patterns; the vehicle instructions determine the applicable arrangement. Pressure requirements must also match the new positions after a permitted move. See its passenger and light-truck tire care manual, printed page 19.
Ask for a plan that identifies the actual assemblies, not just a diagram labeled “four tires.” Record front and rear wheel specifications as well as tire sizes. A front/rear size difference, a wheel difference or an additional manufacturer restriction needs an explicit answer before a proposed move is approved.
Take this confirmation record to the shop
This is an owner-to-installer worksheet. It records a discussion; it does not replace the professional’s inspection or the applicable service procedure. Print this section or copy its fields into your service notes.
| Record field | What to enter |
|---|---|
| Vehicle and setup | Year, model, trim, relevant suspension/brake/wheel changes |
| Tire identity | Brand, model, full size and service description for each tire |
| Current position | Left front, right front, left rear, right rear, or unmounted |
| Markings observed | Exact wording; arrow if present; associated photo filenames |
| Information still missing | Unreadable side, uncertain symbol, or documentation requested |
| Installer’s decision | Required orientation and permitted positions; any restrictions |
| Supporting instructions | Manual, product information or written clarification used |
| Follow-up | Unresolved item, responsible contact, date and final answer |
A useful handoff sounds like this: “Here are the photographs and the exact tire details. Please confirm the mounting markings and the position plan for my current vehicle setup, and note any question that needs manufacturer clarification.”
If you have just received the tires, combine this record with the VCORSA delivery and installation checklist. Save identification photographs with your tire registration and recall record so they remain useful after installation.
Common questions
Is a VCORSA tire directional just because of its tread pattern?
Check the markings and current instructions for the exact model and size. This article’s single reference photo does not classify the entire VCORSA range. If the information is incomplete, send the identity and photographs to Vicrez support and your installer for clarification.
What if I can see INSIDE on an installed tire’s outward-facing side?
Ask a qualified tire professional to check it before further driving. Provide the location and a readable photo. Have the shop determine and correct the installation rather than trying to reverse or remount the tire yourself.
Does correct orientation explain uneven wear?
It answers one installation question. It does not diagnose wear or prove the rest of the setup is correct. Bring the history and photographs to the shop; our uneven tire-wear guide helps organize that separate discussion.
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