menkster
Posts: 6
Joined: Mon Jan 09, 2017 9:01 pm
Delivery Date: 01 Jan 1917

Re: 55+ psi tire pressure... any reason for that?

Tue Jan 10, 2017 10:23 pm

LeftieBiker wrote:So, Menkster, can you verify that 35psi maximum is actually stamped on the tires? Maybe they are Chinese bargain basement units, in which case I'd replace them.


Did this photo count as verification?
Image

I'm conflicted whether to call them low quality or high quality because on one hand, they claim to be max 35 psi... on the other hand, they seem to be running fine on 55 psi as opposed to exploding...

RonDawg
Posts: 2651
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Delivery Date: 11 Jan 2013
Leaf Number: 027089
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Re: 55+ psi tire pressure... any reason for that?

Tue Jan 10, 2017 10:38 pm

menkster wrote:
LeftieBiker wrote:So, Menkster, can you verify that 35psi maximum is actually stamped on the tires? Maybe they are Chinese bargain basement units, in which case I'd replace them.


Did this photo count as verification?
Image


Image isn't coming through. Google+ isn't very friendly about linking. Use something else like imgur.

I'm conflicted whether to call them low quality or high quality because on one hand, they claim to be max 35 psi... on the other hand, they seem to be running fine on 55 psi as opposed to exploding...


That's a lot like saying that it must be safe to drive at 80 in a 50 zone in the rain, I do it all the time with no problems...

If the sidewalls really do say 35 psi max, as Leftie said those are probably crap tires. Your car was probably a lease return and since the OEM Bridgestone Ecopias are well known for not making it to the 3 year mark of most leases, the last person to have it likely put the cheapest crap he/she could find that met NMAC's inspection standards since the car wasn't going to be a keeper. Or the dealer who ultimately sold the car did that to boost his profits but still be able to boast "new tires" in the ad.

Either way, you'll want to replace them sooner than later, and lower the tire pressure NOW. You don't want to find out just what the tire's limits are when you hit a minor bump or obstacle on the road that wouldn't flatten it at the proper tire pressure, and now you're hurtling out of control towards that bus thanks to a blowout.
Blue Ocean 2012 Leaf SV, lost that 1st bar on 11/21/2015 at 26,435 miles.
Lease returned on 12/23/2015. Final LeafStat figures: 225 Gids, 17.44 kWH, SOC 91.89%, SOH 82.36%, 69.49% HX, 54.57 Ahr, battery temp 61.8 F
Now driving a 2015 VW eGolf SEL

Nagorak
Posts: 60
Joined: Fri Jan 06, 2017 9:12 pm
Delivery Date: 03 Jan 2017
Leaf Number: 417128

Re: 55+ psi tire pressure... any reason for that?

Tue Jan 10, 2017 11:13 pm

Yeah, I wouldn't run with an extra 20 psi in the tires. There's overinflating and then there's OVERINFLATING.

I'd drop them down to around 40 psi if I were you, or maybe 45 if you're daring.
Last edited by Nagorak on Tue Jan 10, 2017 11:22 pm, edited 2 times in total.

Nagorak
Posts: 60
Joined: Fri Jan 06, 2017 9:12 pm
Delivery Date: 03 Jan 2017
Leaf Number: 417128

Re: 55+ psi tire pressure... any reason for that?

Tue Jan 10, 2017 11:21 pm

LeftieBiker wrote:So, Menkster, can you verify that 35psi maximum is actually stamped on the tires? Maybe they are Chinese bargain basement units, in which case I'd replace them.


Unless range is an issue, it'd probably be most economical to just run the tires until they wear out and then replace them. Even if you get a bit worse efficiency, the difference probably won't be enough to cover the cost of new tires. From an environmental standpoint, it's also probably worse throwing out a perfectly good tire with its sunk energy costs, only to get slightly higher mileage.

LeftieBiker
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Re: 55+ psi tire pressure... any reason for that?

Wed Jan 11, 2017 12:21 am

My concern was with the idea of cheap tires that had been severely overinflated for a significant length of time. I wouldn't trust them not to blow out even at the rated pressure.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

jjeff
Posts: 1383
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Delivery Date: 13 Jul 2014
Leaf Number: 422121
Location: MSP MN

Re: 55+ psi tire pressure... any reason for that?

Wed Jan 11, 2017 7:01 am

I also can't see the photos but it's pretty straight forward, if the OP has read the tires and they do indeed say 35lbs max on the sidewall, I'll take their word for it, I mean tires of many years ago use to max out at 35lbs and possibly cheap Chinese tires still do(OP, what brand are they?) that said since they probably are "cheap" tires it would be one more reason to not over inflate them. Sure they haven't blown yet, but do you want it to happen when going 70mph down a busy freeway :shock: no I'd immediately lower the pressure to no more than max inflation pressure when cold. Don't worry about what they get to warm, max inflation pressure is always cold and they assume the tires will get to a higher pressure when warm, that part is built in the spec. What you don't want is to over inflate the tires when cold, then they'll get even more over inflated when hot.
I believe exactly what someone else said, the car was a lease return and either the previous owner got the cheapest POS they could to pass the inspection or possibly the seller did the same, to be able to advertise "new" or slightly new tires, but I'd more suspect my first scenario.
Leftie biker made a valid point too, it's just how safe you feel with possible sub standard tires, I mean a set of 4 new "good" tires is probably going to cost you close to $500 mounted and balanced, thats your call.....
2012 SL purchased used 2/'16
2013 S w/QC purchased new
Juicebox Premium 60a L1/L2 EVSE, Ebusbar 16a L1/L2 EVSE
'12 EVSEupgrade'd 20a L1/L2 EVSE, '13 EVSEupgrade'd adjustable 6-20a L2, 6-13a L1 EVSE
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GE Durastation 30a

powersurge
Posts: 673
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Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: 55+ psi tire pressure... any reason for that?

Wed Jan 11, 2017 7:14 am

I know I sound like a broken record, but...

Don't replace anything, and just leave things alone at 35psi and drive the car until you need new ones.. why spend $$$ that you don't need to spend????

RonDawg
Posts: 2651
Joined: Sat Jan 12, 2013 3:46 am
Delivery Date: 11 Jan 2013
Leaf Number: 027089
Location: SoCal

Re: 55+ psi tire pressure... any reason for that?

Wed Jan 11, 2017 7:21 am

powersurge wrote:I know I sound like a broken record, but...

Don't replace anything, and just leave things alone at 35psi and drive the car until you need new ones.. why spend $$$ that you don't need to spend????


Because the OP's safety, and the safety of others, is important. Leftie rightfully mentioned concerns about using such a tire if it's been severely overinflated for so long. Another thing I'm concerned about is whether these tires have a sufficient load rating for a car as heavy as the Leaf. With such a low max pressure printed on the sidewalls, there's a good chance they're not.
Blue Ocean 2012 Leaf SV, lost that 1st bar on 11/21/2015 at 26,435 miles.
Lease returned on 12/23/2015. Final LeafStat figures: 225 Gids, 17.44 kWH, SOC 91.89%, SOH 82.36%, 69.49% HX, 54.57 Ahr, battery temp 61.8 F
Now driving a 2015 VW eGolf SEL

menkster
Posts: 6
Joined: Mon Jan 09, 2017 9:01 pm
Delivery Date: 01 Jan 1917

Re: 55+ psi tire pressure... any reason for that?

Wed Jan 11, 2017 11:33 am

Thanks for the tips about image posting!
I'll try this again...
Image

menkster
Posts: 6
Joined: Mon Jan 09, 2017 9:01 pm
Delivery Date: 01 Jan 1917

Re: 55+ psi tire pressure... any reason for that?

Wed Jan 11, 2017 11:42 am

Thanks everyone! I'll definitely at least lower the pressure as opposed to keeping the current inflation. I had also wondered about the effects of prolonged overinflation... of course better safe than sorry and just replace, but easier said than done (or spent). :| At the same time, the visual of having a tire blow out then careening into oncoming traffic is quite visceral...

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