im sure ive forgotten something.....................................................http://jalopnik.com/cars/quest ... -268186.php?autoplay=true


oh yeah illepall

No bolts on tires? Shoddy Lugs maybe?
~Bryan~

I've seen that video several times and a lot of the comments suggest the wheel nuts were overtightened. Whilst it is possible to overtighten wheelnuts I doubt it would end up with 20 of the things failing at the same time. As far as I can see that was just a simple (but very embarrassing and thankfully not very damaging) case of some numpty forgetting to tighten or torque his wheel nuts.

Does anybody actually know the likely risk of wheelnuts failing due to overtightening? I'd always assumed it was advisable not to overtighten on the grounds that you could strip a thread or potentially the increased stress could increase the chances of a nut or stud breaking over a long time period. The other thing that doesn't seem very clear to me is how overtight do they have to be overtight?

I tried googleing but gave up after came across a 'road safety' site that said apparently one must check ones wheelnuts every 30 minutes or 25 miles :doh:

explanation is given on the verry same page if u scroll down a bit

"From what I understand from people that were there, lugnuts with the wrong thread for the studs were used. There was enough engagement with the threads to hold the wheels on until there was a sideways load, then they stripped out."

Quote from ajp71 :

I've seen that video several times and a lot of the comments suggest the wheel nuts were overtightened. Whilst it is possible to overtighten wheelnuts I doubt it would end up with 20 of the things failing at the same time. As far as I can see that was just a simple (but very embarrassing and thankfully not very damaging) case of some numpty forgetting to tighten or torque his wheel nuts.

Does anybody actually know the likely risk of wheelnuts failing due to overtightening? I'd always assumed it was advisable not to overtighten on the grounds that you could strip a thread or potentially the increased stress could increase the chances of a nut or stud breaking over a long time period. The other thing that doesn't seem very clear to me is how overtight do they have to be overtight?

I tried googleing but gave up after came across a 'road safety' site that said apparently one must check ones wheelnuts every 30 minutes or 25 miles :doh:

A friend of mine (a mechanic) says 10-14 Nm are enough... I always tighten my wheel with 12 Nm with a torque wrench and never had any problems...

And I swear I've seen this video on the forums before...

et tu, ajp? So now when I see BBT post, I think it's Tristan. This time I thought, "HA! I know that's BBT!" And it wasn't....

I find it hard to believe that all lugnuts would come off at the exact same time, or more that there were only one left on each wheel and all 4 wheels came off at the exact same time. But then again, I have only had loosely torqued lugnuts once on one wheel, and I knew it the moment they loosened rather than when the wheel fell off.

Quote from bbman :

A friend of mine (a mechanic) says 10-14 Nm are enough... I always tighten my wheel with 12 Nm with a torque wrench and never had any problems...

And I swear I've seen this video on the forums before...

12 Nm... thats just over hand tight, i would say 100 Nm at least

Quote from andybarsblade :

12 Nm... thats just over hand tight, i would say 100 Nm at least

Is it? He told me in kilo, and as moving 1 kg = 1N and I always adjust the wrench to 12, I thought it'll be 1:1 with Nm as well... So multiply it with 10 then...

Quote from bbman :

Is it? He told me in kilo, and as moving 1 kg = 1N and I always adjust the wrench to 12, I thought it'll be 1:1 with Nm as well... So multiply it with 10 then...

1kg is 9.81N (on Earth at least).

So 10-14 should be 98 to 137Nm.

Anyone courageous enough to post 'lug torque adjustment' into the improvement suggestions?

Make it zero by default, give no mention about it in the patch Y release note and spectate some hilarious T1 action during the first hours.

Quote from andybarsblade :

12 Nm... thats just over hand tight, i would say 100 Nm at least

id say exactly 100 ... at least thats what we always used when i worked in a garage

as for overtightening in general ... whatever that was hed have to overtighten them to the point where the thightening alone rips the thread off the screws to get that effect

Quote from spankmeyer :

Anyone courageous enough to post 'lug torque adjustment' into the improvement suggestions?

Make it zero by default, give no mention about it in the patch Y release note and spectate some hilarious T1 action during the first hours.

best idea ever

I always tighten the 4 nut single seaters to 40lb/ft (54Nm) 120lb/ft (162Nm), no idea where those figures came from but the wheels don't seem to fall off or the threads strip very often so it must be about right

Proper torque settings for ANY nut is always the same...."shear ...then back half-a-turn"!!

This is from the same source as the dictionary of fine measurements that has terms like "a smidgen", a "gnats gnadger", and a "hairs breadth".

So now you know