ŠKODA Octavia A7 (2013–2020) is one of the most popular models on the Russian market, but even its owners often encounter problems when selecting rims. The main headache is center hole (DIA), which many people confuse with PCD or overhang. An error of just 1-2 mm can lead to the steering wheel wobbling, accelerated wheel bearing wear, or even the inability to install the disc on the hub.
In this article we will analyze exact dimensions of the central hole for all modifications Octavia A7 (including RS and Scout), we’ll explain why you can’t blindly trust the inscriptions on disks, and we’ll show you how to choose the right hub spacers if your disk doesn’t fit DIA. You will also find out what hidden options affect compatibility - they are not indicated either in catalogs or on disc labels.
What is the center hole of the disc and why is it more important than PCD
Central hole (designated as DIA or Center Bore) is the diameter of the seat on the disk, which is put on hub (protrusion) of the hub. Unlike PCD (bolt patterns), where an error of ±0.5 mm is allowed, here any gap leads to problems:
- 🔧 Steering wheel beating at speeds over 80 km/h, the disc “walks” on the hub, creating an imbalance.
- 🚗 Accelerated wear wheel bearings and ball joints due to uneven load.
- ⚠️ Spontaneous unscrewing bolts (nuts) when driving over uneven surfaces.
On Octavia A7 hub hub has conical shape, so the disk should fit tightly on it, without play. If the DIA of the disk is larger than the hub, the disk is “wobbly”; if it is smaller, it cannot be installed without grooves or hub spacers.
⚠️ Attention: Some “craftsmen” advise boring the disk hole on a lathe. This unacceptable for cast and forged wheels - the structure of the metal is disrupted, which leads to cracks under load.
Official center hole dimensions for ŠKODA Octavia A7
The manufacturer clearly regulates the parameters for all modifications Octavia A7 (2013–2020), including 2017 facelift. The data is valid for petrol and diesel versions, as well as for Octavia RS and Scout:
| Modification | Central hole (DIA), mm | PCD (bolt pattern) | Reach (ET), mm |
|---|---|---|---|
| Octavia A7 (all bodies: liftback, station wagon) | 57,1 | 5×112 |
38–45 |
| Octavia RS (gasoline/diesel) | 57,1 | 5×112 |
35–42 |
| Octavia Scout (all terrain) | 57,1 | 5×112 |
40–47 |
| Octavia A7 FL (facelift 2017–2020) | 57,1 | 5×112 |
38–45 |
Please note: 57.1 mm - this is nominal size. In practice, an error of ±0.1 mm, but no more. Discs with DIA 57,0 or 57,2 may cause installation problems.
- Steel stamped
- Cast light alloy
- Forged
- Others
Why do they write “DIA 66.6” on the discs, but they fit Octavia A7?
This is the most common question among owners. The fact is that many disks (especially aftermarket) have universal center hole, designed for several models VAG. For example, a disk with the inscription DIA 66,6 suitable for:
- 🚘 Audi A4/A6 (hub 66.6 mm)
- 🚗 VW Passat B8 (hub 66.6 mm)
- 🔧 ŠKODA Superb 3 (hub 66.6 mm)
But how does he sit down? Octavia A7 with hub 57.1 mm? Here are used plastic or metal spacer hubs (they are also centering rings), which make up the difference. For example:
| DIA disk | Hub hub Octavia A7 | Required spacer |
|---|---|---|
| 66.6 mm | 57.1 mm | Ring 57,1→66,6 (thickness ~4.75 mm) |
| 72.6 mm | 57.1 mm | Ring 57,1→72,6 (thickness ~7.75 mm) |
Important: the spacer must be exact in size and made of durable material (preferably aluminum or steel). Plastic rings can become deformed under high loads.
Before purchasing spacer hubs, measure the hub diameter Octavia A7 caliper. There are cases when the hub is worn out and its actual size is less than 57.1 mm (for example, 56.9 mm).
How to correctly measure the center hole of the disc and hub hub
Do not trust the inscriptions on the disk - it is better to double-check yourself. You will need caliper (or even a ruler if you don't have a tool).
Measure hole diameter on disk (inner diameter)
Measure diameter hub hub (protrusion outer diameter)
Check the data with the compatibility table
If the difference is more than 0.2 mm, select spacer hubs -->
Step by step instructions:
Remove the wheel and clean the hub from dirt.
Measure the diameter of the hub hub (the protrusion that the disc fits onto). On Octavia A7 it must be
57.1 ±0.1 mm.Measure the inner diameter of the center hole of the disk. If the disk is already installed, you can measure the gap between the hub and the edge of the hole (should be
0 mm).If you haven't purchased the disc yet, check its labeling. For example, the inscription
DIA 57,1orCB 57,1means compatible with Octavia A7.
The photo below shows an example of the correct fit of the disk on the hub (on the left) and incorrectly (on the right), where the gap is visible:
Photo examples of disk landing
In the correct photo, the disk sits tightly on the hub without gaps. On the wrong one, a gap of 1–2 mm is visible between the hub and the edge of the hole, which will lead to beating.
⚠️ Attention: If you are buying used wheels, be sure to check geometry of the central hole. Used discs may be deformed (oval) due to impacts or improper use.
Top 5 mistakes when selecting disks based on the central hole
Even experienced car owners make mistakes, which later result in vibrations or breakdowns. Here are the most common:
Ignoring spacer hubs. Many people believe that if the disc “fits” onto the hub, then everything is in order. But even the minimum play in
0.5 mmwill lead to runout at high speeds.Buying universal disks without checking. Discs with inscription
DIA 66,6/72,6require the mandatory installation of centering rings.Use of plastic hubs. They deform when heated and loaded, which leads to wheel imbalance.
Not taking into account hub wear. Over time, the hub hub can be “cut off” to
56.8–56.9 mm, and a disk with DIA57,1will not sit tightly.Self-growing disc. This disrupts the structure of the metal and can lead to cracks.
To avoid problems, always check with manufacturer's catalogs (for example, ET, BBS, Ronal) or use online compatibility configurators.
If the disk does not fit tightly onto the hub, do not “hammer” it under any circumstances. This will lead to deformation of the seat and microcracks.
Compatibility of drives from other models VAG with Octavia A7
Many owners Octavia A7 trying to save money by buying disks from other models Volkswagen Group. But there are nuances here:
| Donor model | DIA, mm | Compatible with Octavia A7 | Notes |
|---|---|---|---|
| VW Golf 7 | 57,1 | ✅ Full | Same hub, but check offset (ET) |
| Audi A3 8V | 57,1 | ✅ Full | Fits without modifications |
| VW Passat B8 | 66,6 | ⚠️ Partial | Spacer hubs required 57,1→66,6 |
| ŠKODA Superb 3 | 66,6 | ⚠️ Partial | Likewise Passat B8 |
| Seat Leon 3 | 57,1 | ✅ Full | Identical parameters |
Important: even if DIA matches, check offset (ET) and rim width. For example, disks from Audi S3 have ET 35–38, which may be too little for Octavia A7 (optimally 38–45).
What to do if the disk does not fit in the center hole
If you have already purchased a disk with the wrong DIA, there are several options:
Buy spacer hubs. The most correct and safe way. Cost - from 300 to 1500 rubles per set (depending on the material).
Turn the disc on a lathe. Acceptable only for steel wheels! Cast and forged parts cannot be sharpened.
Return the disc to the seller. If the disc is new and does not meet the stated parameters, you have the right to an exchange under the Law “On the Protection of Consumer Rights”.
Never use old-fashioned methods such as wrapping electrical tape around the hub or placing washers - this will lead to emergency situation at high speed.
When purchasing spacer hubs, take a set of aluminum or steel with anodized coating. Plastic and silumin wear out quickly.
FAQ: Frequently asked questions about the center hole Octavia A7
Is it possible to install wheels with DIA 66.6 mm without hub spacers?
No, this will lead to steering wheel beating and accelerated bearing wear. Be sure to use centering rings 57,1→66,6.
What happens if the central hole of the disk is 1 mm larger than the hub?
The disc will “walk” on the hub, which will cause vibrations at speeds from 60 km/h and uneven tire wear. Over time this can lead to unscrewing bolts.
Will discs fit? Octavia A5 on Octavia A7?
No, y Octavia A5 hub hub 57.0 mm, and A7 — 57.1 mm. The difference is 0.1 mm may seem insignificant, but in practice the disk will not fit tightly.
Can spacer hubs from other cars be used?
Only if their sizes match exactly with the required ones (for example, 57,1→66,6). Spacers from VW Passat or Audi A4 will be suitable if they are designed for the same range.
How to check if the disk is seated correctly on the hub?
After installing the wheel, rock it with your hands in a horizontal plane. If there is backlash — the disc is not centered correctly. Also check the gap between the hub and the edge of the hole (should be 0 mm).