Hi
New member here. Purchased a Used Approved 2020 base Cayman 6 weeks ago and just joined the PCGB..
This is my first Porsche and we did not get off to a very happy start because I had to make a warranty claim almost immediately. However that was dealt with efficiently by my local OPC and has now been fixed (I hope!).
I now have a query about tyres. I’m more curious than anything else.
The car has 20 inch wheels fitted with Pirelli PZero’s all round.
The offside rear tyre is less worn than the nearside. I understand that this due to the tyre being replaced due to suffering a non-repairable puncture. (See image).
The offside rear tyre has a very thin grooved tread on the outside shoulder of the tyre. There do not appear to be any wear bars in this groove. This groove is entirely absent from the outside shoulder of the nearside tyre. Possibly worn away?
Now comes the numpty question. Is the nearside tyre legal?
The reason I ask is that the legal requirement is the tread has to have a minimum of 1.6 mm depth across the central 75% part of the tyre. If my calculations are correct the central 75% starts and ends 33 mm from the sides of the tyre.
If that is indeed the case, it suggests that the tyre is illegal as the thin grooved tread on the outside shoulder of the tyre is entirely absent.
BTW. Before I purchased the car I asked the OPC for the tread data used as part of the 111 point check and they only provided it for the 4 other grooves for all the tyres.
New member here. Purchased a Used Approved 2020 base Cayman 6 weeks ago and just joined the PCGB..
This is my first Porsche and we did not get off to a very happy start because I had to make a warranty claim almost immediately. However that was dealt with efficiently by my local OPC and has now been fixed (I hope!).
I now have a query about tyres. I’m more curious than anything else.
The car has 20 inch wheels fitted with Pirelli PZero’s all round.
The offside rear tyre is less worn than the nearside. I understand that this due to the tyre being replaced due to suffering a non-repairable puncture. (See image).
The offside rear tyre has a very thin grooved tread on the outside shoulder of the tyre. There do not appear to be any wear bars in this groove. This groove is entirely absent from the outside shoulder of the nearside tyre. Possibly worn away?
Now comes the numpty question. Is the nearside tyre legal?
The reason I ask is that the legal requirement is the tread has to have a minimum of 1.6 mm depth across the central 75% part of the tyre. If my calculations are correct the central 75% starts and ends 33 mm from the sides of the tyre.
If that is indeed the case, it suggests that the tyre is illegal as the thin grooved tread on the outside shoulder of the tyre is entirely absent.
BTW. Before I purchased the car I asked the OPC for the tread data used as part of the 111 point check and they only provided it for the 4 other grooves for all the tyres.
![5874B161E82F40A3A0994EE3F17F6636.jpg](https://www.porscheclubgb.com/forum/legacymedia/upfiles/112323/5874B161E82F40A3A0994EE3F17F6636.jpg)
![DB7350F26B6D44CBAB5174F7AF59FC2E.jpg](https://www.porscheclubgb.com/forum/legacymedia/upfiles/112323/DB7350F26B6D44CBAB5174F7AF59FC2E.jpg)