Michelin pilot road 4 gt

Discussion in 'General VFR Discussions' started by pzpz, May 14, 2018.

  1. pzpz

    pzpz New Member

    Country:
    Israel
    Joined:
    Aug 22, 2016
    Messages:
    27
    Likes Received:
    1
    Trophy Points:
    3
    I bought a motorcycle pilot road 4 gt (25.2016) and have been riding it for the last year

    Its cracked at center all around the tire !!!


    see attached photo.


    1. Is it safe to ride the tire ?

    2. What is the reason for this ? ( I”v been riding pr4 for years and years, replacing them 1 set per year – never seen this before on any of my tires).

    3. could this be a defect in the tire gum mixture ? or some other defect

    4. was there a recall at 25/16 ?


    Regards

    Ze’ev

    IMG_20180509_092442.jpg IMG_20180511_084327.jpg IMG_20180511_084340.jpg
     

    Attached Files:

    Last edited: May 16, 2018
  2. mofo

    mofo New Member

    Country:
    United States
    Joined:
    Jul 11, 2011
    Messages:
    1,128
    Likes Received:
    34
    Trophy Points:
    48
    Location:
    Orange County Ca.
    Map
    That is weird. Looks to me like the tires are way older than 25/16. Curious as to what Michelline has to say about that.
     
  3. Trakrat

    Trakrat New Member

    Country:
    United States
    Joined:
    Mar 25, 2018
    Messages:
    44
    Likes Received:
    8
    Trophy Points:
    8
    Location:
    South Texas
    I'd call them up. Never seen that before unless its an undercover road 5 3D printer error
     
  4. pzpz

    pzpz New Member

    Country:
    Israel
    Joined:
    Aug 22, 2016
    Messages:
    27
    Likes Received:
    1
    Trophy Points:
    3
    Unfortunately Michelin did not bother to get back to me !!!!:dislike:
    Seems to me its a Michelin rubber defect (that also what a local car tire specialist thought it may be)

    At first glance, it lookd like dry rot.
    But this does not correlate with the date or the cut pattern (straight lines, vertical to the road directions, only at the center, all around)
    The date 25/16 is correct, i bought the set at 08/16 - with rubber smelling like it just out of the oven. they were very fresh.
     
  5. Trakrat

    Trakrat New Member

    Country:
    United States
    Joined:
    Mar 25, 2018
    Messages:
    44
    Likes Received:
    8
    Trophy Points:
    8
    Location:
    South Texas
    I went with Pirelli Angel GT's and just got them this week. They seem very sticky compared to the aging michellins power rs 2ct's I had. So far good!
     
  6. 34468 Randy

    34468 Randy Secret Insider

    Country:
    United States
    Joined:
    Dec 18, 2007
    Messages:
    12,670
    Likes Received:
    857
    Trophy Points:
    158
    Location:
    Chilliwack, BC Canada
    Map
    I just checked my rear tire, PR4, and it is beginning to show the same cracks, just not nearly as bad as yours. I think I will give them a call sometime soon to see what Michelin says. When I speak to them, I will make them aware of this thread and that it does not seem to be an isolated problem.

    I don't think other tires have that sip that runs around the middle of the tire so maybe it is just the rubber breaking away from constant 90 degree stress along that groove. Maybe a tread design flaw?
     
  7. 34468 Randy

    34468 Randy Secret Insider

    Country:
    United States
    Joined:
    Dec 18, 2007
    Messages:
    12,670
    Likes Received:
    857
    Trophy Points:
    158
    Location:
    Chilliwack, BC Canada
    Map
    I just thought I would update my status on these tires. I got back from Mexico a couple months ago and the tires served me well even going off onto a road I have no business being on. I am about to go pick up my rear wheel which I just had the tire changed due to wearing out. I don't know the mileage on this tire, but guestimate it lasted as long as any of the others I have had on this bike. At 218,000 km, I have had many sets of tires now. I have lost track of how many tire changes now.

    I mentioned I saw similar cracks developing in my tires. They did not get any worse and had no affect on the handling or life f the tire. I am replacing the tire with the same one.
     
Related Topics

Share This Page