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Old 04-13-2020, 02:39 AM   #1
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Tyre pressures

Gents, Help required. I cannot for the life of me get the tyre pressures for my 2006 Boxster 987 as I have 16" wheels on the front.
Tyre sizes are Rear--265/35/18. Front 235/40/16. Can anyone help please

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Old 04-13-2020, 04:47 AM   #2
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That's because the 987.1 (2005-2008) never came from the factory with 16" wheels. 17" was the smallest on a 987.1. Do the front and rear wheels match?

I would suggest 30 psi for your fronts, then keep an eye on wear. Watch to see if both edges or the center show wear. The former means not enough air, the latter too much.

My second 'I would suggest' finding a pair of 18" fronts for a 987.
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Old 04-13-2020, 05:05 AM   #3
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Originally Posted by phill View Post
Gents, Help required. I cannot for the life of me get the tyre pressures for my 2006 Boxster 987 as I have 16" wheels on the front.
Tyre sizes are Rear--265/35/18. Front 235/40/16. Can anyone help please
28psi Front

34psi Rear

While I KNOW what are the fronts... the rears you may want to double-check... for I run 16 all around, and you've an odd setup.

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Old 04-14-2020, 07:38 AM   #4
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Originally Posted by husker boxster View Post
That's because the 987.1 (2005-2008) never came from the factory with 16" wheels. 17" was the smallest on a 987.1. Do the front and rear wheels match?

I would suggest 30 psi for your fronts, then keep an eye on wear. Watch to see if both edges or the center show wear. The former means not enough air, the latter too much.

My second 'I would suggest' finding a pair of 18" fronts for a 987.
Yes all wheels match and it runs beautifully grips like xxx well you know what. I am very happy with the performance I am getting just could not find any pressures. Thanks for your reply.
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Old 04-14-2020, 07:40 AM   #5
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28psi Front

34psi Rear

While I KNOW what are the fronts... the rears you may want to double-check... for I run 16 all around, and you've an odd setup.

thanks for your reply. Yes I can confirm the rears are 18" and it runs and grips so well. I thought it odd but he ho if it works don't fix it. Just a concern about the pressures I should be running.
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Old 04-17-2020, 05:25 AM   #6
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Pick a set pressure say 30psi. Take the car on a long run and check pressures. If pressure has risen by more then 10 % original pressure was to low ~ if gone up by less then 10% original pressure to low. Will take some Time but you’ll find the correct pressure
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Old 04-17-2020, 07:44 AM   #7
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Pick a set pressure say 30psi. Take the car on a long run and check pressures. If pressure has risen by more then 10 % original pressure was to low ~ if gone up by less then 10% original pressure to low. Will take some Time but you’ll find the correct pressure
Driving generates heat and pressures will go up from that 3-4 deg normally.

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