Posts : 873 Join date : 2011-01-31 Age : 52 Location : somewhere in the north sea
Subject: tyre sizes and pressures Wed 5 Oct - 20:33
Wondering what the correct tyre size and pressure should be for the different models
Would the speedo not be affected if you run the inncorrect ratio ?
baldy
Posts : 5677 Join date : 2010-03-16 Age : 53 Location : Just resting my finger in this hair trigger.....
Subject: Re: tyre sizes and pressures Wed 5 Oct - 20:41
225/40/18s stick about 32psi
phil555
Posts : 2461 Join date : 2010-03-16 Age : 51
Subject: Re: tyre sizes and pressures Wed 5 Oct - 20:43
All depends on your wheel size TBH. I run 215/35/18 with 33 psi in the front & 31 psi in the rear on my Classic type R.
wrx/uk/ppp
Posts : 873 Join date : 2011-01-31 Age : 52 Location : somewhere in the north sea
Subject: Re: tyre sizes and pressures Wed 5 Oct - 20:44
Yeah but is there not a difference between classic and newage ?
phil555
Posts : 2461 Join date : 2010-03-16 Age : 51
Subject: Re: tyre sizes and pressures Wed 5 Oct - 20:48
wrx/uk/ppp wrote:
Yeah but is there not a difference between classic and newage ?
Yeah. Baldy is running the Newage 18" set up.
wrx/uk/ppp
Posts : 873 Join date : 2011-01-31 Age : 52 Location : somewhere in the north sea
Subject: Re: tyre sizes and pressures Wed 5 Oct - 20:55
yeah me 2 and mine are 225/40/18 which i think is correct to keep the speedo in line just wondering about the psi?
and if i was running 17s which profile would be correct ?
phil555
Posts : 2461 Join date : 2010-03-16 Age : 51
Subject: Re: tyre sizes and pressures Wed 5 Oct - 20:58
PSI is a matter of choice IMO. Sure I was running 225/40/17 or 235/40/17 on my old Blobeye.
wrx/uk/ppp
Posts : 873 Join date : 2011-01-31 Age : 52 Location : somewhere in the north sea
Subject: Re: tyre sizes and pressures Wed 5 Oct - 21:08
yeah my potenzas on my 17s are 215/40/17 and correct and my 18s are 225/40/18 just thinking that if profile is lower say 35 instead of 40 your speedo will be out and register wrong ?
and have to look into psi/s as think mine might be too hard lol
phil555
Posts : 2461 Join date : 2010-03-16 Age : 51
Subject: Re: tyre sizes and pressures Wed 5 Oct - 21:09
wrx/uk/ppp wrote:
yeah my potenzas on my 17s are 215/40/17 and correct and my 18s are 225/40/18 just thinking that if profile is lower say 35 instead of 40 your speedo will be out and register wrong ?
and have to look into psi/s as think mine might be too hard lol
Our speedo will be out by a few MPH if you run the incorrect profile.
KushBex
Posts : 1487 Join date : 2010-03-20 Age : 53 Location : Durham
Subject: Re: tyre sizes and pressures Wed 5 Oct - 21:15
Hey Keith, There is a good tyre size calculator here that tells you exactly what the differences are between sizes:
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