loppy

hey guys any one know tyre pessures 215 45 17 on a M.Y 2000 classic thanks guys

budd

iTrader: (5)

I tend to use 32psi all round, but it depends on the type of tyre, load and driving, changing the pressure a few psi either way can 'tweek' the handling to suit you, so I'd get hold of a decent gauge and experiment a little.

Suberman

...If you want to keep to specification. It's located at the driver's door jam. But i believe MY00 classics do not come with 215/45R17 stock? In that case, you'd have to experiment alittle.

loppy

cheers guys i have gone with 32 around so i guess i wasnt far out !!

TonyBurns

iTrader: (3)

Yup 215/40/17 or 205/45/17, the 215/45/17 is completely wrong for a classic and you should be running one of the first 2 tyre sizes or it will put your speedo out (if it under reads its illegal, it can only over read by 10% or its illegal).

I use to run 32f 30r on my 215/40/17 on my first classic, that was pretty much what most people ran, you can run as low as 28 on the rear or as high as 34 on the front.

Tony

Bungleaio

iTrader: (1)

Sorry to thread hijack but can any recomend a pressure for 225/40/18 on a hawk WRX.

Cheers

loppy

so tony what difference to the speedo reading will a 215 45 17 be compared to a 205 45 17 as they both have the same 45 profile, and just for reference the speedo reading is ok , the 45 profile tyre stood slightly higher than the 205 50 16 that's was fitted where as the 40 profile tyre stood a considerable amount lower, i had both profiles rimmed up to check and besides the 40 profile looked stupid in the arch as it is standard ride height!!!, i thought the RB5 could run the 45 profile or the 40 so how does that work with the speedo?? thanks for the pressure advice..
Steve

gallois

45 is 45% of the width, so 45% of 205mm or 215mm, overall the difference is 9mm in diameter, the 215 is larger by 1.46%. A larger tyre will make the speedo under-read. with your new tyre, 30mph indicated will actually be 30.4mph, 60mph indicated will actually be 60.9mph.

source - http://www.kouki.co.uk/utilities/vis...ize-calculator

loppy

gallois, cheers for that web site link what a cool thing!! either with 40 or 45 the speedo reading is slightly different one way or another, at least iam not that far out for the speed cameras!!! i thought it was pretty much the same and this has confirmed it.. i love my 45s!!!
cheers mate Steve

b0x

While I can't answer you I can tell you that tyre pressures aren't an exact science.

Set a good average pressure (eg 32 all round, as above) then experiment with a few psi over and under. Do it an axle at a time, and have a good hoon in-between (any excuse ) and find out what works for your tyres and driving tyre

MaDaSS

I went from 215/45/17 at 32 front and 30 rear as per door sticker to 225/40/18's I now run at 33 front and 31 rear. Fine for me! LOL

corradoboy

Tyre pressures are based on the weight of the vehicle, hence why there is usually a quoted figure for partially loaded (2 people and minor luggage) and fully loaded (4 people and full luggage). Although changing tyre sizes for wider tracks, lower profiles and bigger diameters changes the internal volume of the tyre, it is not enough of a variable on the handling characteristics of the car to be a concern in any way as greatly as weight changes things. The general rule is to start at the manufacturers recommended pressures and vary it slightly to suit your personal preference and driving style, or to compensate for any irregular wear you may notice over time.

With regards to speedo's, THIS is a useful tool. The legality of how accurate your speedo is is only applicable to vehicle manufacturers, and any variance after manufacture whether through failure, wear and tear or alterations would never come under scrutiny, unless it were to be used as part of a legal proceeding, which is unlikely.

b11fyn

iTrader: (1)

Hi Bungleaio,,, i have 225/40/18 tyres on a wrx sti prodrive, & i have 36psi front & 34psi rear, i have been usin these pressure`s for years with no problems or tyre wear.

hope this helps

shaun...

corradoboy

No tyre wear in two years Does your car hover ?