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Is the bead really that tight that it can maintain the position long term? I'm surprised that dropping the clutch on a M7 car with drag radials (or even Cup2) on a prepped track and it hooks, that the tire doesn't turn on the wheel.
Or has anyone experienced rotation of the rubber after installing?
You could also experience it on the fronts from braking, in theory, though I've never seen that.
I only run road cources so don't know about drag racing.
My Cup tires and slicks do complete 360 degree+ rotations after 5 - 6 on track sessions when not mounted using an old racers trick. I mark the valve stem position after coming off track to show doubters how much they move/rotate. Even with knurled wheels you get significant slippage when mounted as a regular street tire.
This is why it's a waste of money to balance track tires if you're a fast driver.
I have my slippage down to minimal to none by using the race car trick of using "heavy" duty hair spray as the mounting lubricant. Spray the bead to wet it when mounting and slippage "usually" solved. Don't scrimp on the spray but also don't overdo it.
FWIW, even using hair spray I don't have my track tires balanced as they pick up too much track rubber to make the balance effective for more than the first session...
Anti tire slip knurling beads machined into the wheels! A must have for sticky tires and aggressive brakes. Some reported almost a full 360% slip with Hoosier on other wheels. Our wheels documented about only 2” after track testing at Buttonwillow, local race track in California. Attachment 48353726
Is the bead really that tight that it can maintain the position long term? I'm surprised that dropping the clutch on a M7 car with drag radials (or even Cup2) on a prepped track and it hooks, that the tire doesn't turn on the wheel.
Or has anyone experienced rotation of the rubber after installing?
You could also experience it on the fronts from braking, in theory, though I've never seen that.
You can chalk the valve stem on each tire and see what happens. We used to do that all the time for airing down when we would play off road in our Jeeps.
Bead locks originated because of drag racing to stop this from happening.
Anti tire slip knurling beads machined into the wheels! A must have for sticky tires and aggressive brakes. Some reported almost a full 360% slip with Hoosier on other wheels. Our wheels documented about only 2” after track testing at Buttonwillow, local race track in California.
Does the knurl raise up from the original bead seat dimension or is the wheel machined to tolerance and the knurl is inset below the bead seat?
Anti tire slip knurling beads machined into the wheels! A must have for sticky tires and aggressive brakes. Some reported almost a full 360% slip with Hoosier on other wheels. Our wheels documented about only 2” after track testing at Buttonwillow, local race track in California.
Khoa,
As you know the wheels I bought from you are knurled but I still get slippage of 360+ degrees. Problem is the paint over the knurling diminishes the friction capability of the knurling.
Best solution would be to knurl after they are painted. However, I know this won't happen as buyers would bitch that their new wheels don't have pretty painted beads. Another option is to sand/blast/grind the paint off the knurling but this is a pain in the *** and if you're not careful you can reduce/smooth the knurling.
As stated above using hair spray as the bead mounting lubricant typically solves the problem. I buy the cheapest "heavy" duty hair spray at Dollar General or Wal Mart and I'm usually good to go.
As you know the wheels I bought from you are knurled but I still get slippage of 360+ degrees. Problem is the paint over the knurling greatly diminishes the friction capability of the knurling.
Best solution would be to knurl after they are painted. However, I know this won't happen as buyers would bitch that their new wheels don't have pretty painted beads. Another option is to sand/blast/grind the paint off the knurling but this is a pain in the ***.
As stated above using hair spray as the bead mounting lubricant typically solves the problem. I buy the cheapest "heavy" duty hair spray at Dollar General or Wal Mart and I'm usually good to go.
Rick
True, maybe sand it back down after the powdercoating for very extreme conditions and drivers.
As cars get heavier and stickier tires, more slip will occur. It’s physic. I know GTR slips no matter what you do, according to customers.
As you know the wheels I bought from you are knurled but I still get slippage of 360+ degrees. Problem is the paint over the knurling diminishes the friction capability of the knurling.
Best solution would be to knurl after they are painted. However, I know this won't happen as buyers would bitch that their new wheels don't have pretty painted beads. Another option is to sand/blast/grind the paint off the knurling but this is a pain in the *** and if you're not careful you can reduce/smooth the knurling.
As stated above using hair spray as the bead mounting lubricant typically solves the problem. I buy the cheapest "heavy" duty hair spray at Dollar General or Wal Mart and I'm usually good to go.
Rick
You can also try duct tape. Sounds stupid but it will increase the bead seat area and put more pressure on the tire.
Or they can mask off the knurling from the powder coat or clear coat, I make sure that is done on all my aftermarket wheels, it will stop wheel tire slippage, or you're wasting money because you won't get the best grip from your knurling if you don't
Or they can mask off the knurling from the powder coat or clear coat, I make sure that is done on all my aftermarket wheels, it will stop wheel tire slippage, or you're wasting money because you won't get the best grip from your knurling if you don't
Whether they slip an inch or 360 makes no difference, the balance will be off. I didn't think of grinding the powder coat off the knurling, I will definitely do that next time I change tires.
Is the bead really that tight that it can maintain the position long term? I'm surprised that dropping the clutch on a M7 car with drag radials (or even Cup2) on a prepped track and it hooks, that the tire doesn't turn on the wheel.
Or has anyone experienced rotation of the rubber after installing?
You could also experience it on the fronts from braking, in theory, though I've never seen that.
I get it all the time with my track wheels. The fronts slip from braking and the rears slip from acceleration (accelerating from low 50s to 154) with no drag race starts. I have had the both front and rear tires slip 180 degrees or more.
Here are pictures I took two years ago while running at the Glen.
I believe once the rims and the tires get hot they just slip. And they do get very hot after a 10 minute or more run. I used to get slippage on my C5s and the C6Z as well.
As you know the wheels I bought from you are knurled but I still get slippage of 360+ degrees. Problem is the paint over the knurling diminishes the friction capability of the knurling.
Best solution would be to knurl after they are painted. However, I know this won't happen as buyers would bitch that their new wheels don't have pretty painted beads. Another option is to sand/blast/grind the paint off the knurling but this is a pain in the *** and if you're not careful you can reduce/smooth the knurling.
As stated above using hair spray as the bead mounting lubricant typically solves the problem. I buy the cheapest "heavy" duty hair spray at Dollar General or Wal Mart and I'm usually good to go.
Rick
I removed the paint from the bead area on two sets of Signature wheels and reduced slippage to almost nothing. One knurled set of 18's with Hoosiers and one set of 19/20 (no knurling) with Cup 2's. I ran the Hoosiers at VIR on Monday and had less than 1/4" slip on a couple of tires - front and rear and zero slip on one. No slip so far on the Cup 2's.
for about $30. if you install rim locks on yours wheels your tires will never spin on your rims and bugger up your balance.even 400rwhp with a sticky tire will cause your tires to spin on the rim on street or track.383vett is correct
I removed the paint from the bead area on two sets of Signature wheels and reduced slippage to almost nothing. One knurled set of 18's with Hoosiers and one set of 19/20 (no knurling) with Cup 2's. I ran the Hoosiers at VIR on Monday and had less than 1/4" slip on a couple of tires - front and rear and zero slip on one. No slip so far on the Cup 2's.
The Knurling only works if there is no paint or powdercoat on the knurled part. We do all of powder coating in house so we can control it. Another thing that we learned is that if your tire shop uses a soapy blue lubricant to put your race tires on, they may rotate no matter what..
03-22-2018, 12:54 PM
Why don't our tires turn on the rims?
