Jump to content


Photo

Correct tyre load rating-what is the minimum for 240/260z?


  • Please log in to reply
3 replies to this topic

#1 sydney mike

sydney mike

    Senior Member

  • Members
  • PipPipPipPipPip
  • 610 posts
  • Location:Sydney
  • Tagline:Certified Wheel whore.

Posted 25 May 2014 - 01:00 AM

My tyre placard is faded and unread-able so just want to confirm the load rating for my 260z. Judging from the info I have found, the minimum load rating is 1280lbs which equates to 580.598kg. Load index 89=580kg so therefore the Zed must go to 90 as a minimum?

The current tyres on my 16x8's are 205 55 16 with 91 load so while they are too narrow for the 8" rim, the load is ok. I don't want to run stretched tyres anymore and have read a few posts saying on the 16x8's the best size is to run 225 45 16. But from what I can see, there aren't much to choose from in this size and most of what I can see is load 89.

I have been checking out what other Zeds are running, alot with the 16's are running 205 50's and some 15's with 205 55 with 86 or 87 load.

I know alot of mods we perform on our cars aren't "legal" but what I am concerned about is safety-is a 89 tyre going to be dangerous? If so might go to 225 50 16 which has 92 load.

So can someone confirm the minimum? Discuss.

cheers, Mike.

#2 Triptych

Triptych

    Advanced Member

  • Members
  • PipPipPip
  • 351 posts
  • Location:Brisbane, QLD
  • Tagline:77 GS30

Posted 26 May 2014 - 07:28 AM

This was posted by Scoota awhile back.

This is straight off my 75 260Z Tyre placard 5jX14 with two tyre sizes
175 hr 14 Maximum load 1230 lbs
195 10vr14 Maximum load 1280 lbs

#3 1600dave

1600dave

    Senior Member

  • Members
  • PipPipPipPipPip
  • 607 posts
  • Location:Newcastle,NSW

Posted 26 May 2014 - 10:57 AM

Personally, I 'd round 580.589 down to 580 in the conversion from pounds to kg, and then happily run an 89-rated tyre.

I guess to be 110% legal, you may be correct, but will half a kilo load rating difference make it unsafe ? I highly doubt it.

#4 sydney mike

sydney mike

    Senior Member

  • Members
  • PipPipPipPipPip
  • 610 posts
  • Location:Sydney
  • Tagline:Certified Wheel whore.

Posted 26 May 2014 - 01:27 PM

This was posted by Scoota awhile back.

This is straight off my 75 260Z Tyre placard 5jX14 with two tyre sizes
175 hr 14 Maximum load 1230 lbs
195 10vr14 Maximum load 1280 lbs


Thanks Triptych, I did see that post. On modern cars, for example my missus' CRV it gives the stock wheel & tyre combo and 102T, the 102 load rating and T speed rating. So if I was to get aftermarket wheels and tyres I know I cannot go lower than 102 and slower than T.

So with the Zed's placard it has the two tyre wheel combo's with 1230lbs (558kg) for the 175hr14 in which 88 load is ok. The other combo 195vr14 1280lbs(580.6kg). If you follow the rule of minimum you would round up and get a load rating of 90 which would make 89 illegal.

Did the 260z come out in Australia with steel wheels and 175's? If so, you can use the 88 load for legality.

So my question is, do we follow the 88 or the 90?

Personally, I 'd round 580.589 down to 580 in the conversion from pounds to kg, and then happily run an 89-rated tyre.

I guess to be 110% legal, you may be correct, but will half a kilo load rating difference make it unsafe ? I highly doubt it.


Dave I totally agree with you, just curious on the legality.

cheers, Mike




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users