Tyre Pressure?
Discussion
I know its been asked many times before but the search function has not been working all weekend and I could do with an answer.
Fitted so3's on the rear on friday. The Manual says 24psi for so2's and I think I heard of people running at 23 etc but the guy who fitted them said that seemed too low and I got scared.
Currently at 26 but what would you recommend.
Fitted so3's on the rear on friday. The Manual says 24psi for so2's and I think I heard of people running at 23 etc but the guy who fitted them said that seemed too low and I got scared.
Currently at 26 but what would you recommend.
Fleshlight, there was a whole posting relating to this issue - searched for it under my profile as I was asking the question you just asked. Seems only more recent replies are held on members profiles.
Anyway, the handbook says 24 psi rear on SO2s - '98 Griff - I've had SO3s front and back for 3 years, rears on last set running at 24.
I got 16k miles out of those, but wear was in centre of tyre, 1/3rd of width, edges 1/3 each were fine.
Asking other Griff/Chim owners, and on here, the conclusion was that the rigidity of the sidewall is greater on SO3s than SO2s, meaning 24 psi is over inflated. This means that the centre portion of the tyre gets more wear as it is convex in shape rather than flat.
I now run rears at 22, hoping to get 20k miles out of this pair (or more!) - I was told by the dealer I bought from 4 1/2 years ago I might stretch to 12k miles if I was careful.
I do like to enjoy the acceleration and slidy tail occasionally, not tracked the car as yet; probably 4000 of those miles were long motorway journeys, the rest playing on shorter trips.
Hope this helps you. (I also run the fronts 2 psi lower than SO2 handbook spec). If I find the post, I will put the url in for you.
G
As promised, a useful link here - www.pistonheads.com/gassing/topic.asp?t=144674&f=13&h=0&hw=tyre+pressure
Hopefully this also is of help.
>> Edited by grm500 on Tuesday 6th September 15:07
Anyway, the handbook says 24 psi rear on SO2s - '98 Griff - I've had SO3s front and back for 3 years, rears on last set running at 24.
I got 16k miles out of those, but wear was in centre of tyre, 1/3rd of width, edges 1/3 each were fine.
Asking other Griff/Chim owners, and on here, the conclusion was that the rigidity of the sidewall is greater on SO3s than SO2s, meaning 24 psi is over inflated. This means that the centre portion of the tyre gets more wear as it is convex in shape rather than flat.
I now run rears at 22, hoping to get 20k miles out of this pair (or more!) - I was told by the dealer I bought from 4 1/2 years ago I might stretch to 12k miles if I was careful.
I do like to enjoy the acceleration and slidy tail occasionally, not tracked the car as yet; probably 4000 of those miles were long motorway journeys, the rest playing on shorter trips.
Hope this helps you. (I also run the fronts 2 psi lower than SO2 handbook spec). If I find the post, I will put the url in for you.
G
As promised, a useful link here - www.pistonheads.com/gassing/topic.asp?t=144674&f=13&h=0&hw=tyre+pressure
Hopefully this also is of help.
>> Edited by grm500 on Tuesday 6th September 15:07
grm500 said:
Fleshlight, there was a whole posting relating to this issue - searched for it under my profile as I was asking the question you just asked. Seems only more recent replies are held on members profiles.
Anyway, the handbook says 24 psi rear on SO2s - '98 Griff - I've had SO3s front and back for 3 years, rears on last set running at 24.
I got 16k miles out of those, but wear was in centre of tyre, 1/3rd of width, edges 1/3 each were fine.
Asking other Griff/Chim owners, and on here, the conclusion was that the rigidity of the sidewall is greater on SO3s than SO2s, meaning 24 psi is over inflated. This means that the centre portion of the tyre gets more wear as it is convex in shape rather than flat.
I now run rears at 22, hoping to get 20k miles out of this pair (or more!) - I was told by the dealer I bought from 4 1/2 years ago I might stretch to 12k miles if I was careful.
I do like to enjoy the acceleration and slidy tail occasionally, not tracked the car as yet; probably 4000 of those miles were long motorway journeys, the rest playing on shorter trips.
Hope this helps you. (I also run the fronts 2 psi lower than SO2 handbook spec). If I find the post, I will put the url in for you.
G
>> Edited by grm500 on Tuesday 6th September 14:16
I replaced the rear SO3's on my Griff recently .... with 2 more SO3's and noticed that the centre half of the tread pattern was completely worn. I assumed that the previous owner had upped the pressure for track days as I know he did them ...... but maybe I am wrong !
A word of caution, I use a racing high accuracy Tyre gauge, I checked all the other tyre gauges I own and found a 15 psi variation, petrol station gauges are just as crap, don't believe any of em
I run SO3s 22f 24r wear & handling OK but my SO2s were much better, I'm going toyos next
OZb
I run SO3s 22f 24r wear & handling OK but my SO2s were much better, I'm going toyos next
OZb
Gassing Station | Griffith | Top of Page | What's New | My Stuff