Loosing traction control bad when's raining?

[Rp1990]

1) 245/35/20

2) idk bec I didn't masure it

3) 225/45/17 I think for 2004 maxima SL

4) wet condition only at passed 45 mph

5) almost 7,000 miles

i haven't done tires rotation n wheel balance.

 

[HTSS_TR]

Diameter of 245/35/20 is about 26.75"
Diameter of 225/45/17 is about 25.00"

The diameter of the tire on 20" wheel is about 7% larger than the OE size. This may be the problem with the car loosing traction/control at high speed. When you change the wheels/tires you need to stay within 2-3% of OE diameter.

The safest upgrade is +1, from 225/45/17 to 225/40/18 or 235/40/17. It improves performance/handling by a good margin with little suffering in stiffer ride.

 

[CapriRacer]

Originally Posted By: Rohan
1) 245/35/20

2) idk bec I didn't masure it

3) 225/45/17 I think for 2004 maxima SL

4) wet condition only at passed 45 mph

5) almost 7,000 miles

i haven't done tires rotation n wheel balance.


I am sure some of you are wondering why it is I always go back to the vehicle tire placard. This is a good example.

First, the original tire size for a 2004 Nissan Maxima SL was 225/55R17 95V - and the pressure specified on the placard was 33 psi.

If that tire was replaced by a 245/35R20 - which happens to be 95 Load Index in an Extra Load, then that means the tire requires more inflation pressure than what is on the vehicle tire placard - 39 psi.

Underinflated tires are more prone to wet traction issues - and that might completely explain Rohan's problem. But Rohan didn't measure the inflation pressure like I asked him - nor did he actually look at the vehicle tire placard to see what was written there. Folks, if you expect help, you've got to supply reliable information. Otrherwise, we are guessing.

 

[Rp1990]

@ caprRacer: I know psi of tires is below 35. So do u want me to put it to 40 psi?

I had 40 psi but tires shop took out air they tld me I only need 35 psi I said okay.

Btw that's nice explaining my friend.

 

[Rp1990]

I forgot I also have bc racing coilover

 

[rshunter]

First thing is to reset your pressures to the 39psi that CapriRacer recommended. Most tire "techs" seem to think every car tire on the planet needs to be at 35psi. They're wrong...

Second is to check the tire sidewalls and ensure that the rotation arrows are pointing the correct direction. That means that if the arrow is above the axle centerline, it points toward the front of the car. If the arrow is below the centerline when you're looking at it, it should be pointing toward the rear of the car.

Make sure those two points are handled first, then report back.

 

[Rp1990]

I check the psi at the pump station n is was showing me:

Front Left: 20
Front Right: 28-30
Both rear same: 30

later I made them all closer is to 40 psi.

 

[rshunter]

Originally Posted By: Rohan
I check the psi at the pump station n is was showing me:

Front Left: 20
Front Right: 28-30
Both rear same: 30

later I made them all closer is to 40 psi.

That should help a lot. Next is to verify that the tires were mounted with the correct direction of rotation.

 

[Rp1990]

How I know if tires facing correct direction? Pictures would be helpful to me.

 

[HTSS_TR]

If your tires are uni-directional, take a look at the arrows on the tire, it should be clock-wise for passenger side tires and counter clock-wise for driver side tires.

 

[rshunter]

Originally Posted By: Rohan
How I know if tires facing correct direction? Pictures would be helpful to me.

...if the arrow is above the axle centerline, it points toward the front of the car. If the arrow is below the centerline when you're looking at it, it should be pointing toward the rear of the car.

Take a look at the tire HERE. When you look at your tires, from the front of the car, the tread should look like that. If the tread looks that way when you're standing behind the car, then it's mounted the wrong way.

 

[Rp1990]

Can somebody show me picture of it which way is supposed to be. It'll be good for me since I'm not good at English.

Btw my car is more stiffer than before after I put air to 40 psi. Lol

 

[HTSS_TR]

Look at this picture from Tirerack.com showing the Sumitomo HTR A/S P01 in large size (full screen photo).
http://www.tirerack.com/tires/BigPic.jsp?sidewall=Blackwall&tireMake=Sumitomo&tireModel=HTR+A%2FS+P01+%28H%26V%29&partnum=26VR6HTRAS&vehicleSearch=false&fromCompare1=yes

This tire is on driver side, the arrow is near the bottom it shows counter clockwise rotation.

If this is on the passenger side it rotates the wrong way, to be corrected the arrow should point to opposite direction, i.e., clockwise.

If you look at the tires on the front of the car, bout front tires should have the tread pointing at the same direction.

 

[Rp1990]

Okay I did look at both pics n I'll keep u posted tommor.

 

[Rp1990]

My question is if they mount the tire backward then won't be flaken name discreption will be inside. I mean the name n other tire size will be inside.

Like is supposed to be showing outside flaken.

I hope u understood me?

I did look at the tires but pattern of the tire confusing me but flaken name is outside like u we know when we park the car n somebody wanna look what brand of tire I have later they'll see flaken brand. If not then is inside that mean mounted backward. Am I correct?

 

[rshunter]

The same info is on both sidewalls...

 

[HTSS_TR]

Originally Posted By: Rohan
My question is if they mount the tire backward then won't be flaken name discreption will be inside. I mean the name n other tire size will be inside.

Like is supposed to be showing outside flaken.

I hope u understood me?

I did look at the tires but pattern of the tire confusing me but flaken name is outside like u we know when we park the car n somebody wanna look what brand of tire I have later they'll see flaken brand. If not then is inside that mean mounted backward. Am I correct?

Can you post pictures of all 4 tires on the car, driver front and rear and passenger front and rear, then we will be able to tell if they are correctly mounted.

 

[MCompact]

Coilovers and 20" wheels on a Maxima...

 

[rshunter]

Originally Posted By: MCompact
Coilovers and 20" wheels on a Maxima...

Oh well, it could be a Civic with a fartcan and an F1 rear wing...

 

[MCompact]

Originally Posted By: rshunter

Oh well, it could be a Civic with a fartcan and an F1 rear wing...


True enough...