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nEUROtic
28-05-2005, 06:03 PM
Took my Euro for 1000km service yesterday. They pulled down the tyre pressures from 40 down to about 32? Does anyone know why they did this?

HondaONE even said push em up 5psi to improve fuel economy. I like the handling better too. Is this gonna **** my tyres??

aaronx88
28-05-2005, 06:09 PM
Actually, too much psi will f*** your tyres. Your tyres will be worn unevenly, the centre worn out first. The correct tyre psi should be 32psi for front and 30psi for back assuming you have the 05 17inch rim.

When I bring in for service, the mechanic actually told me 35psi. But I choose to ignore him and follow that sticker beside the drivers door.

Me too would like to hear the views of euro drivers here.

Aaron

nEUROtic
28-05-2005, 06:11 PM
Yeh thats what he said as well, 35, and like i said hondaONE also says 5 more. I have the 16" Rim but its about the same.

yfin
28-05-2005, 06:13 PM
40psi cold is ok - just don't exceed the maximum psi on the tyre itself - probably 50psi.

It will wear slightly faster from the inside but the tyre runs cooler and flexes less so I doubt you will notice it wear any faster than someone running 32psi.

nEUROtic
28-05-2005, 06:16 PM
Yeah I live about 1km from the servo so im always cold pressures

yfin
28-05-2005, 06:18 PM
Yeah I live about 1km from the servo so im always cold pressures

Get your own guage - the servo guages are hopeless.

nEUROtic
28-05-2005, 06:26 PM
Well Honda said it was 40, and I had pumped it to 40. So looks good.

PNR888
28-05-2005, 06:56 PM
I am very particular with my tyre pressure. Here is my routine:
- get a good quality tyre gauge (mine is metal base with dial)
- for 16" under normal driving condition
220Kpa = 32psi for front. 210Kpa= 31.5psi for rear.
- for Constant highspeed hwy driving
260 Kpa = 38 psi for front 250Kpa= 36psi for rear
- I always do 36 or 37 psi for my tyres (cold) as I do fair bit of hwy driving.
- I think 32psi cold is a bit too low, the side of tyre tend to wear quicker, and if you are a bit slack sometimes, your tyre pressure will drop below acceptable and causing even faster tyre wear.
- To get accurate reading, measure it when the tyre is absolutely cold, take a reading (eg 30psi), then go to your good old trusty servo station, measure the tyre pressure again with your own gauge (eg. 33psi coz tyre warmed up). If you want 36psi cold, then you need to boost extra 6 psi of air in, so after pump air in, your gauage should read 39psi (warm tyre).
- the key is to get a reading when the tyre is cold.
Good luck.

Chris_F
28-05-2005, 09:14 PM
i'm shocking with my tyre pressures... they servo air pumps are horrible when tryin to figure out exact pressures. Hopefully i can find a way to get em at the right levels, maybe buy a gauge like Pnr888 suggested.

V205
28-05-2005, 11:36 PM
My philosophy for tyre pressure is use the highest pressure possible that doesn't cause the middle part of the tyre to wear at a faster rate (due to over inflation). This is geared towards better handling being the priority.

The alternative is using the lowest pressure that doesn't cause the outside edges of the tyre to wear at a faster rate (due to under inflation). This is geared towards better comfort being the priority.

However, the 1st option is better IMO because tyre looses air, so it will lose pressure and still maintain in ok wear pattern until the next air-pump, as oppose to the 2nd option loosing air causing underinflation and more tyre heat / wear and loss of handling performance.

Slugoid
29-05-2005, 12:50 AM
I have those pen pressure gauges and they only cost like $10 at Kmart, and they are quite accurate. I go to those servo's with the digital tyre pumps and they are only 0.5-1 psi off, so if you don't have your own gauge, go to those instead.

I have been using 40 psi for around half a year and they have stopped the outside edges of my tyres wearing out. Ironic, cos the reason why my outside edges were wearing out in the first place was because I was using the recommended pressure on the placard....32 front and 30 rear.

Some people may call me crazy for putting in 40 psi, but I really like it. Makes the car handle much better, even tyre ware (from my half year observation), less screeching when I corner hard, and generally more responsive. Haven't noticed any increase in distance when braking, in the wet or dry. I suggest you guys give it a try and maybe, try to prove me wrong on this. If not 40 psi, try something like 35 or 35 psi. Even at those pressure, you will notice a big difference.

PNR888
29-05-2005, 08:26 AM
My philosophy for tyre pressure is use the highest pressure possible that doesn't cause the middle part of the tyre to wear at a faster rate (due to over inflation). This is geared towards better handling being the priority.

The alternative is using the lowest pressure that doesn't cause the outside edges of the tyre to wear at a faster rate (due to under inflation). This is geared towards better comfort being the priority.

However, the 1st option is better IMO because tyre looses air, so it will lose pressure and still maintain in ok wear pattern until the next air-pump, as oppose to the 2nd option loosing air causing underinflation and more tyre heat / wear and loss of handling performance.

Totally agree with you. :thumbsup: I always go for the 1st option described above.

fortec@sprint.net.au
10-08-2005, 09:38 PM
I use 37 psi front and 35 psi rear. Front higher than rear due to front wheel drive and weight. Have tried the full range 40/38 to 32/30 and found 37/35 works best.

I pump it higher than factory spec as less rolling resistance and also helps prevent the Euro bottoming out on deep gutters/driveways

leungie
11-08-2005, 12:51 AM
What's the general recommendation for 18s? the same as above?

EuroAccord13
11-08-2005, 12:57 AM
For my 18s (225/40R18) I run 35 Front and 33 Rear, my 16s (225/50R16) I run 36 Front and 34 Rear...

If you are going to the track, the recommendation is like 45-50psi to ensure your sidewall doesn't break at cornering...

Suntzu
11-08-2005, 11:25 AM
For my 225/40/R18 Im running 40 front 37 rear. Im really happy with handling and fuel efficient with this setting. At 33psi front it felt vague to me and now its precise. I only check mine every month or two so I need a little extra for losses.

nexace
11-08-2005, 02:02 PM
I use 37 psi front and 35 psi rear. Front higher than rear due to front wheel drive and weight. Have tried the full range 40/38 to 32/30 and found 37/35 works best.


Thanks! :)

V205
11-08-2005, 02:58 PM
Hi there,

I've also been using extra 2 PSI in the front tyres of my FWD hondas.

I was interested in your opinion of why you'd pick 37F/35R over 36F/34R or 38/36R.

Thanks.


I use 37 psi front and 35 psi rear. Front higher than rear due to front wheel drive and weight. Have tried the full range 40/38 to 32/30 and found 37/35 works best.

I pump it higher than factory spec as less rolling resistance and also helps prevent the Euro bottoming out on deep gutters/driveways

coladuna
11-08-2005, 06:55 PM
I never put in below 35PSI.
The servo I use is not close to my place so I'm only able to measure it when the tyres are warmed up. Therefore, I usually put in around 38psi for the front tyres and 36psi for the rear. Sometimes I go up to 40psi/38psi.

V205
11-08-2005, 07:37 PM
Mine was delivered from dealer with 45 PSI on all 4.

I started from 36F/34R, felt a bit soft. Then I moved to 40F/38F and currently still on that pressure. After a few weeks.. I think they may be a bit on the hard side, will try the in between of 38/36 and see how that goes.

VirIIx
12-08-2005, 12:08 PM
i sit between 38 and 40

Eurotony
12-08-2005, 12:49 PM
I have just worn out the OEM tyres at 43k by running at 32 front & 31 rear. Actually only the outside edges of the tyres were worn due to the low pressure, still plenty of meat in the middle.
The tyre dealer suggested running the higher of the 2 pressures on the tyre placard because here in Australia we tend to run higher speeds than in Japan.

I am now running 38 all round on the 16" rims with the Dunlop 2050 tyres, seems fine so far. :)

VirIIx
12-08-2005, 03:58 PM
Eurotony,

what do you mean by 'we run higher speeds than in Japan'?

are you referring to the speed limit?

Eurotony
12-08-2005, 04:24 PM
Eurotony,

what do you mean by 'we run higher speeds than in Japan'?

are you referring to the speed limit?

Yes apparently that is correct, I'm told that in japan the open road speed limit is 80km's & we can run to 110k's in most states. That's why he said to use the higher placard limit.

aaronng
12-08-2005, 04:33 PM
Awww... what about the doriftoooooo team? I've seen videos where they do over 100km/h, but the speed limit on the crappy road with cracks was 40km/h.

I'm using 36psi warm. I guess I'll go pump it up more.

fortec@sprint.net.au
13-08-2005, 05:59 PM
No particular reason for picking 37/35 over say 38/36. Just do some experiments. I tried 40/38 one week, then 38/36 the next, etc. Just find 37/35 suits my driving. I also find that I need the tyres need checking/pumping weekly. I lose about one PSI each week

V205
13-08-2005, 06:59 PM
Is this on stock euro 16" or 17"?


No particular reason for picking 37/35 over say 38/36. Just do some experiments. I tried 40/38 one week, then 38/36 the next, etc. Just find 37/35 suits my driving. I also find that I need the tyres need checking/pumping weekly. I lose about one PSI each week

fortec@sprint.net.au
15-08-2005, 07:41 PM
This is on stock Euro 16".

Not sure what the equivalent would be on 17", suggest you start at 37/35 and experiment

tanalasta
09-06-2006, 12:16 AM
Anyone else have experience with stock 17"? My dealer was kind enough to release the car with 25PSI on my front tyres. It felt like a flat tyre on the freeway.

Bastards.

I find I also lose about 1-2PSI a week. Especially in the front tyres. Am going to go back when my car is cold and pump up to 34/32.

Slugoid
09-06-2006, 01:39 AM
I said 40 PSI a year ago, but I think that's a tad too much, and not suitable for some tyres :p. Try going at least 35-38 PSI cos I reckon that range is the best for most tyres in the Euro. Under 35 PSI for me feels a bit sluggish. Should play around and see what you like.

For those experiencing loss of pressure over short periods of time, try getting metal valve caps. Stops air leaks better than the stock plastic ones. You can get them from any automotive shops in a wide range of colours :D

tanalasta
09-06-2006, 09:18 AM
What a difference temperature makes. Pumped my slightly warm (I let them cool for only about half an hour) to 33/31 and it felt a bit sluggish. Just yesterday.

Today, went back cold with a 9 degree temperature outside and it read significantly lower. Heck, the front was almost 28!

Had them pumped to 34/32 (taking into account it's Winter) and I'm loving it so far. Stock Potenza's 17"

aaronng
09-06-2006, 10:29 AM
Too low a pressure also means the tyre doesn't seal as well to the rim when compared to higher pressures. So those with pressures below 28 and are losing pressure, just pump it up to 33-35.

Also check if you have any bolts or screws that might have stabbed your tyres. LOL

GEN46L
10-06-2006, 07:59 PM
One thing I'm surprised about is that no one has mentioned the use of NITROGEN.
I fill my 40 Series 17's to 35 PSI with NITROGEN due to the Stability of Pressures over all heat ranges. With Normal Air it changes state quickly when it warms up and pressures increase. If you run them at 32 PSI cold they will run a few PSI higher when hot. That's why they recommend to only check or adjust tyre pressure when cold. If you check them when Hot and there is 32 PSI in them then when cold they may be only at 28 or 29 PSI which is too low and will cause wear to the Outer edges. If you set the tyre pressures too high when cold it will wear in the centre. Excessively high cold tyre pressures (45+) can also cause a harsh ride and some times a very fast vibration throught he steering. The harsher the ride the more wear & tear on Suspension Components as well. The contact patch on the road is less therefore making the tyre less efficient in Wet & Dry Road Conditions. The centre of the tyre runs a lot hotter so there is less heat disipation across the tread. Too Low a cold pressure (<28) can cause excessive load on Balljoints and Suspension Bushes. Excessive wear to outer edges, Less contact patch on the road, less heat disipation. The tyre compound temperature on the edges get's too high which can cause tread separation. Friction Supply exceeds Friction Demand, The list goes on & on. Oh yeah it will also affect Fuel Consumption as well.

FILL WITH NITROGEN @ 35 PSI.:thumbsup:

hotout
10-06-2006, 09:18 PM
I've run 42 psi all round with a Potenza 195/60 15 on my 92 Accord and now 40 psi on my 2005 VTi Accord, no problems with centre wear at all....

PS I've done a total of 110,000 km on them

you'll probably only get centre wear problems if you exceed the max psi on your tyre.

yfin
10-06-2006, 10:03 PM
FILL WITH NITROGEN @ 35 PSI.:thumbsup:

Putting aside some of the unproven claims that have been said about nitrogen by marketers (eg doubling tyre life) - the problem I have with nitrogen is that I can't make minor pressure adjustments (without paying for another nitrogen fill) to suit my driving. The Honda sports suspension I have is quite harsh with anything more than 32 psi around Melbourne. So I find 32 works in town. On long trips, however, where there are long periods of highway driving I like to pump the tyres up to 40psi so the tyres run cooler and also to improve emergency braking (just in case ;)).

Suntzu
11-06-2006, 10:39 PM
Ive got 18x7 speedys on mine and I run 41psi on the front and 38 psi on the rear. Very precise handling/ braking. Good on fuel. Works for me. I would never run less than 36psi.

tanalasta
11-06-2006, 11:31 PM
After a good day's drive - I'm happy with 34 front / 32 rear. It was a 5 degree night when I filled up my tyres, cold (petrol station within 2 minutes).

I would hesitate to fill up to 40PSI cold ... on a hot day it could come close to 45-50PSI.

Potenza's 225/45R17

Would not fill with Nitrogen. I check my tyre pressure every 1-2 weeks. And always let some air out accidentally with my tyre gauge. Imagine how much that'd cost me in Nitrogen!

EuroDude
09-08-2006, 11:28 AM
Get your own guage - the servo guages are hopeless.


So true, except for those digital ones :thumbsup:

ps. shouldnt this thread be in the euro section?

blk05gli
14-10-2006, 09:38 PM
yep, thats right, thats the reading i had on my front left tyre when i bough my car from the dealer.

i run 38 F & R for city driving and its all good.

aaronng
14-10-2006, 10:07 PM
So true, except for those digital ones :thumbsup:

ps. shouldnt this thread be in the euro section?
The digital one at the BP near my place is consistently off by 2 psi. At least it is consistent.

tony1234
15-10-2006, 12:19 AM
I run nitrogen 38 all round.seems to be a good all round pressure.It cost $20 for 4 tyres.I take it back every 3 mths for top up (loses approx. 2 pound).costs me nothing!!I've used it before for 4 yrs.Seems to prolong life of tyres.

Slugoid
15-10-2006, 06:39 PM
I run nitrogen 38 all round.seems to be a good all round pressure.It cost $20 for 4 tyres.I take it back every 3 mths for top up (loses approx. 2 pound).costs me nothing!!I've used it before for 4 yrs.Seems to prolong life of tyres.

Interesting....tell me more about this. So $20 for 4 tyres...how many times can you take it back for free?? Wouldn't mind trying some for my track tyres.

tony1234
15-10-2006, 06:54 PM
Interesting....tell me more about this. So $20 for 4 tyres...how many times can you take it back for free?? Wouldn't mind trying some for my track tyres.
I just go back every 3-4 mths.for a check and they top it up.Most Bob Jane tyre shops have it.i got it from the Tempe store.:thumbsup:

Omotesando
17-10-2006, 12:31 AM
I run on the 17" roughly 35F and 34R.

I just like more tyre grip, but without it being so low that it handles like jelly.

I'm very very happy with the tyre pressure as it is now. Any higher and it doesn't want to corner that well!

EuroAccord13
17-10-2006, 01:55 PM
I run 225/50R16 and I pump 36 front and 34 rear...

Less on a super hot day...

aaronng
17-10-2006, 03:17 PM
I need high tyre pressure to prevent my rims from getting damaged from the road construction here. 37psi F/R 205/55 R16

tony1234
17-10-2006, 06:21 PM
I think you need to run 2psi higher in the front than you do in the rear.The guy that did my suspension mods and tyres said to put at least 2-4 psi more than the tyre placard says on the drivers door.

aaronng
17-10-2006, 07:12 PM
2psi higher in the front so that you have safer handling. :)

My tyre placard says 32psi front and rear.

tony1234
17-10-2006, 07:38 PM
2psi higher in the front so that you have safer handling. :)

My tyre placard says 32psi front and rear.
I think it's due to more weight being over the front wheels.Mine says 32psi ft.30 rear.:confused:

aaronng
17-10-2006, 08:02 PM
I think it's due to more weight being over the front wheels.Mine says 32psi ft.30 rear.:confused:
Since I am running above the stock 32psi, I don't need to have the front tyres higher by 2psi since the 37psi will support the weight.

Weird on the difference though... Hmm, I wonder if it is because the 06 suspension is softer than the 03-05 Euros.

tony1234
18-10-2006, 07:00 AM
Since I am running above the stock 32psi, I don't need to have the front tyres higher by 2psi since the 37psi will support the weight.

Weird on the difference though... Hmm, I wonder if it is because the 06 suspension is softer than the 03-05 Euros.
I suppose so.I reckon the 06 suspension is softer than 03-05!!!