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Tire wear
- Thread starter padu
- Start date
What bike, what track, corner exit (on the gas hard), what pace (lap times), using warmers? I can tell me rears going by how easily it will spin and if the front slides and it has a substantial amount of laps on it (I'm usuall on takeoffs) I toss it. Two days with alot of laps at tmp will kill a tire, heck one day without flipping will kill 1/2 a tire (depending on pace).
padu
Well-known member
2009 zx6r Laps in the 1.26 mark to 1.28 , Yes warmers used, I found the back broke lose twice existing the corner and the front washed once in the corner, Tires have 2 track days on them, I was runnning 28psi on them when it i felt the tires wash, At it was at the end of the day, Tires look used butnot killed, Just wondering if the tires have to many heat cycles ?
The number of laps is the important information that is missing.
Suspension issues could be revealing themselves(what type of suspension setup is being used?)
Suspension issues could be revealing themselves(what type of suspension setup is being used?)
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+1. Who told you to set your pressures at that?
FriendlyFoe
Well-known member
I'm assuming you're running those times at tmp? Track and configuration is useful information, grand bend long track thats a very quick lap, tmp not so much.
If you're running at TMP, that track eats tires. I run around 1:23's there and cooked the left side of a power one in two days. With the power ones it's a good indicator that you're almost at the end of the tire when both tire sipes dissapear on the outside as seen in the picture below. You'll know the tires done because the bike will try to high side you. The michelins do truly fall off like a cliff.
If you're pushing fronts at the end of the day i'm betting it's because you were getting tired and putting weight on the bars. I put 3 days at tmp and another 3 at grand bend on a power one front before i tucked the front trying to be a trail braking hero, the tire still had lots of grip left in it. Actually you're probably feeling the front flex but not push because of too low psi.
You might also want to know that the michelin tire rep at the track (wayne - kennedy motorsports) recommends 30psi **cold** for the front power one, 34/35 hot seems insanely high to me and i've been bumping it down a little, but you probably want to be running higher then 28 warm in a power one. Dont take my word on it (seriously dont because i wont take responsibility for you falling down lol), talk to the vendor you bought those tires from and see what they say. Cant give you a psi for rear because i'm on a 160 rear and its not the same.
If you're running at TMP, that track eats tires. I run around 1:23's there and cooked the left side of a power one in two days. With the power ones it's a good indicator that you're almost at the end of the tire when both tire sipes dissapear on the outside as seen in the picture below. You'll know the tires done because the bike will try to high side you. The michelins do truly fall off like a cliff.
If you're pushing fronts at the end of the day i'm betting it's because you were getting tired and putting weight on the bars. I put 3 days at tmp and another 3 at grand bend on a power one front before i tucked the front trying to be a trail braking hero, the tire still had lots of grip left in it. Actually you're probably feeling the front flex but not push because of too low psi.
You might also want to know that the michelin tire rep at the track (wayne - kennedy motorsports) recommends 30psi **cold** for the front power one, 34/35 hot seems insanely high to me and i've been bumping it down a little, but you probably want to be running higher then 28 warm in a power one. Dont take my word on it (seriously dont because i wont take responsibility for you falling down lol), talk to the vendor you bought those tires from and see what they say. Cant give you a psi for rear because i'm on a 160 rear and its not the same.
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padu
Well-known member
LAps I have no idea to be honest and for suspension im ok as john has set the bike up for tmp,
padu
Well-known member
I have read thats what the tires should be at, They seem ok on that psi, TO be honest Ive run between 28 and 31 I think I had them down to 28 to get them to hook up more, only did 8 or 9 laps
padu
Well-known member
I'm assuming you're running those times at tmp? Track and configuration is useful information, grand bend long track thats a very quick lap, tmp not so much.
If you're running at TMP, that track eats tires. I run around 1:23's there and cooked the left side of a power one in two days. With the power ones it's a good indicator that you're almost at the end of the tire is when both tire sipes dissapear on the outside as seen in the picture below. You'll know the tires done because the bike will try to high side you. The michelins do truly fall off like a cliff.
If you're pushing fronts at the end of the day i'm betting it's because you were getting tired and putting weight on the bars. I put 3 days at tmp and another 3 at grand bend on a power one front before i tucked the front trying to be a trail braking hero, the tire still had lots of grip left in it. Actually you're probably feeling the front flex but not push because of too low psi.
You might also want to know that the michelin tire rep at the track (wayne - kennedy motorsports) recommends 30psi **cold** for the front power one, 34/35 hot seems insanely high to me and i've been bumping it down a little, but you probably want to be running higher then 28 warm in a power one. Dont take my word on it (seriously dont because i wont take responsibility for you falling down lol), talk to the vendor you bought those tires from and see what they say. Cant give you a psi for rear because i'm on a 160 rear and its not the same.
My tires look the same, but not as worn down on the left side, I wear the right more at tmp, Cant see how you killed the left side like that tmp only has like 3 lefts, I think you might be right I was just tired or its something else not the tire, The tire looks good,
Depending on your bike, but i just put in a generic Gixxer and i got 30 PSI for the front and 22 for the rear.
http://michelin-power.com/
You can get a rough idea of what pressures to run using the Michelin link.
As mentioned, contact Wayne at Kennedy motorsports for the correct pressures for TMP.
Was he there with you?
FriendlyFoe
Well-known member
Sorry that picture was taken immediately after flipping it, the left side of the tire in that pic is what the right looked like after 3 days at TMP. If the sipes are gone on the outside of the right you're going to run out of grip soon, and suddenly. Depending on the condition of your front buy a new rear now and take them both off as a set, or if you still have tread on the right maybe flip it before your next day and put one more day on the rear.
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The power one should actually use a lot less rear pressure than that.
I raced on them in the WERA endurance series a couple of years ago and we were using about 23psi in the rear.
23-21 rear pressure is recommended
and 30PSI front.
You're off on the pressure settings, this could be the source of your problem.
I raced on them in the WERA endurance series a couple of years ago and we were using about 23psi in the rear.
23-21 rear pressure is recommended
and 30PSI front.
You're off on the pressure settings, this could be the source of your problem.
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padu
Well-known member
I remember reading something like 28 for the street and lower for the track. As for john at the track no he was with me. My suspension is 25mill ohlins and a stock rear shock set stag and setting to my weight but its 100 percent stock
padu
Well-known member
I Just did mine fast with b compound thats what I run and got 1.5 bar for rear I think thats 22 or 23 psi, I might be wrong and front shows 2.1 bar
padu
Well-known member
These are cold numbers right? and I take it ur running a 1000cc bike, I find 23 low for a 600cc bike, Bike dosent make power to need to hook up that hard, I know when I went to tmp with a s1000rr I needed to lower it a bit has the bike would sometimes light the rear tires up.
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