Hey guys

i want to know if the tyre pressure as stated on the placard are a bit too low. I have a Manual V6 TE and I've got Dunlop 205/65R15 94V SP SPORT 300E. The guys at Beaurepairs said 34 at the front and 32 at the back, which more than what the tyre placard suggest.

What do guys think and what are your tyre pressure for stock tyres?

mid 30's especially for long trips...

Yep as s_tim_ulate said mid 30's are good

most manufacturers tyre specs are there for comfort/noise not for economy.

On my 17s i put in 38 all round and on my 15's i put 32 all round

Tom

205's 36 all round my advice :cool:

damnit now i gotta put my psi up to 36 :rant: lol

Tom

My KJ runs 38/36 around town with 1-2 passengers.

40/38 when highspeed highway work or when all the seatbelts are used.

Hey guys

i want to know if the tyre pressure as stated on the placard are a bit too low. I have a Manual V6 TE and I've got Dunlop 205/65R15 94V SP SPORT 300E. The guys at Beaurepairs said 34 at the front and 32 at the back, which more than what the tyre placard suggest.

What do guys think and what are your tyre pressure for stock tyres?
I used 36 front and rear. Speaking of looking at your placard. Do you know what load rating it says because chances are those tires of yours aren't the right rating.

I used 36 front and rear. Speaking of looking at your placard. Do you know what load rating it says because chances are those tires of yours aren't the right rating.
Yep, I think he's got the wrong rating as well. The standard magna requires (I know its stupid) a
load rating of 95. The later (TJ) sports and VRX requires 94.

Mine's pumped to 40 alround.

i have these stock bridgestone RE 92, suusally pump them to 34 psi, not sure if i should pump up anymore for fuel economy? anyway someone told me, if you pump up too much its easy to lose control or grip or soemthing?

i have these stock bridgestone RE 92, suusally pump them to 34 psi, not sure if i should pump up anymore for fuel economy? anyway someone told me, if you pump up too much its easy to lose control or grip or soemthing?
OK. Here's some info on tyres:

1. Tyres heat up not due to friction on the road surface (unless you are doing a burnout). Tyres
heat up due to the flexing of the steel belts used to strengthen the tyres. Under inflation causes
excessive flexing of the steel belts which causes eventual over inflation and blowout.
2. Underinflated tyres also cause vibrations at higher speeds.
3. Underinflation uses more petrol.
4. Underinflation causes loss of traction during heavy braking (during heavy braking, the centre
of the tyre pulls in towards the wheel so that the bottom of you tyre looks like w when looked
from front or back.) The more pressure the less pronounced the w shape.
5. Over inflation causes loss of traction during normal driving with only the centre of the tyre
touching the road. But, is better for wet roads.

Between 36 and 40 is the recommended pressure, especially for low profile tyres.

Hope the above helps.

P.S. Anyone care to add to the above list?

5. Over inflation causes loss of traction during normal driving with only the centre of the tyre touching the road. But, is better for wet roads.

Overinflation causes balooning above (bulges like a motorcycle tyre),
and the middle of the thread wears out first. It doesn't improve wet grip.

For a passenger car tyre, its overinflation only when you jack it to 80-100psi+.

Anything 40ish is fine.

For a passenger car tyre, its overinflation only when you jack it to 80-100psi+.

Anything 40ish is fine.
That depends on the tyres. I'm sure you'll find that many tyres have a recommended max pressure 40ish. I know mine are around the 40odd mark and they are 98's.

Overinflation causes balooning above (bulges like a motorcycle tyre),
and the middle of the thread wears out first. It doesn't improve wet grip.

For a passenger car tyre, its overinflation only when you jack it to 80-100psi+.

Anything 40ish is fine.
What I meant to say is overinflation reduces chance of aquaplaning. Wide tyres are actually bad
for aquaplaning hence why the introduction of dual tyres (like those one the backs of trucks).

well I must say I think you're all using too much pressure - I'm running standard Magna sport rim 16" tyre size and use 29F/26R around town, with an extra 2lbs added for highway work.

What I meant to say is overinflation reduces chance of aquaplaning. Wide tyres are actually bad
for aquaplaning hence why the introduction of dual tyres (like those one the backs of trucks).
ahh, depends who you believe. :) Think one of our cars still has some ancient
Dunlop Aquajet or thereabouts tyre with a big fat 1" wide groove in the middle
that "makes it work like 2 skinnier tyres". Good old early-1990s marketing...


Higher pressures also reduce tire roll on the rim, less chance of the bead rolling off
the rim in heavy cornering and causing sudden severe deflation (tubeless tyres).

36 front and rear for the exact same tyres on a TR..

I run mine at 38 allround, Verada wagon. I think the placard states 34 or 36 psi for full load plus 4 psi for sustained high speed running. No tyre wear issues with these pressures, nor can I detect any handling or braking issues. Then again, it's still running the OE Bridgestones, which I hate with a passion and would swap them if I had the money today. As a matter of interest I run 46psi front and 60 psi rear in my L300 work van, FedEx van.

i have 19s and i run 42psi in front and 40 in rear..

yeah the van tyres are 45psi all around, how much can you pump that up to if you got full loads quite often? 14' bridgestones