Graining Nitto's

[Black Boss]

Spent the weekend at NCM. Cold temps in the morning on Saturday so I ran on the Michelin PSS. Put a brand new set of NT01's on for the afternoon, once the temps got into the 40's. Lap times were improved 6+ seconds with the combination of Tires and temps. Ran the NT01's Sunday am in warmer temps and couldn't match lap times. Checked the tires and found the right front was blistered, grained and badly worn across 2/3 of the tread:



Re mounted the PSS's and ran faster, than on the grained front. Will post video and times later.....

Looks like Nitto will replace the Tire.

 

[Grant 302]

Looks like a pressure issue...as if it was way overinflated. What were the hot pressures and temps? Doesn't look like 'blistering' to me since all those remaining patches in the center sections are where the grooves or sipes are. Wierd.

 

[Black Boss]

Looks like a pressure issue...as if it was way overinflated. What were the hot pressures and temps? Doesn't look like 'blistering' to me since all those remaining patches in the center sections are where the grooves or sipes are. Wierd.

I thought the same -- but hot pressure was never higher than 37. Left front got to 38, and does more work on a clockwise circuit. I verified temps real time (using Orange TPMS) and adding 2 psi to static pressures after cool down.

Weird as you say.....

 

[VoodooBoss]

Are your alignment, wheel bearings and dampers in good condition?

 

[Steelhorse]

No blisters, I would talk to Nitto and see what they say.

 

[ArizonaBOSS]

I have never seen an NT01 do that. Hopefully it's just a bad tire; if not, better look at your alignment.

 

[superhero]

I'm going with a bearing issuie.

 

[steveespo]

Nick is this track clockwise? Right front shouldn't take that much abuse. Did you feel vibrations, tire just looks weird for being 3 sessions old. Glad Nitto is standing behind it because that looks like defect more than anything to me.
Steve

 

[Black Boss]

Yes Clockwise circuit, but lots of turns (23) so the right gets a work out too, although as Steve points out, the left is in great shape and does even more work. Toe was adjusted (by Steve -- Thanks!) to zero, at prior event. Judging by wear on wear markers Camber is still about 2.8 degrees. I still need to confirm alignment, but ran 3 sessions on worn Nitto's at last event with no issues....

No play in bearing or hub. I'm going with rubber defect. Nitto has agreed to replace......