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hpi_guy
Junior Member
United Kingdom
401 Posts |
 Posted - 07 January 2012 : 21:28:14
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Anyone else experiencing very good wear on blue minipins, these are mine after 10 race meetings  |
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frecklychimp
Average Member
852 Posts |
Posted - 08 January 2012 : 07:46:21
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Mine are like that after 5 meetings... you're spending far too much time on your roof!
Will be trying belting tape in the next set to help stop ballooning under power and hopefully slow down wear rate in the middle of tyre.
Last winter a set of Kourse Kings lasted the whole indoor winter season on a silly quick 4WD SCT and were still useable for a fair few outdoor meetings... think those days have gone with super grippy carpet and new Schumacher tyres having less life. |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 08 January 2012 : 08:09:56
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| What inserts have you got? I have yellow inserts with blue tyres , they seem pretty hard and don't balloon |
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frecklychimp
Average Member
852 Posts |
Posted - 08 January 2012 : 08:29:00
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Fastrax Yellow inserts and Schumacher Blue Minipins... as you have.
Your tyres must be ballooning on power as the centre is worn more than the outers... under weight of car the bottom of tyre/pins should be pretty much flat with floor surface and therefore a more even wear across tyre would be expected.
its the same result as putting too much air in a real car tyre... its a well known fact that Schumacher SCT tyres were all reported as ballooning under development/testing stage but the design was not changed or final production... its not a major problem... belting tape job is easy to do... but let me test it before rushing out to waste money on something that may not make any drastic improvement. |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 08 January 2012 : 08:54:01
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| They may be ballooning a small amount but when I pick the car up and accelerate then there is virtually no ballooning |
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David Smeaton
New Member
United Kingdom
81 Posts |
Posted - 09 January 2012 : 13:23:58
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| Don't forget that when you lift a car off the ground and rev it there is no load on the motor so it will keep accelerating. When a car is on the track the wheels spin a lot slower than when the car is off the ground. Uneven tyre wear is normally caused by camber & toe in settings; assuming the edge with 2 full rows of spikes is the inner edge then you olook to have slight negetive camber which is correct. |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 09 January 2012 : 16:56:49
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| I think that the right hand side of the picture (the side with more spikes) is on the outside of the truck |
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davecorah
Junior Member
United Kingdom
342 Posts |
Posted - 09 January 2012 : 18:05:25
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| you should be wearing the inside of the tyre more as david smeaton said meaning that you would have more spikes left on the outside so you should be correct there will, negative camber is what you need normally 1-3 degrees, positive camber is not good, increasing your negative camber can help with grip roll if you get it, your tyres will balloon out with the motor you have will, might not be extreme but it will be doing it, (only on the rear) belting the inside of the tyre is a way to stop the rubber from stretching out by not allowing it to move, like mark said though let him try it first, then let someone show you a proper way to do it if you decide to, from the look of your tyres its not ballooning to bad and they are wearing very similar to how mine were so you may not benefit as much, i belive mark is running 6.5t in his sct which through the 2wd will cause more ballooning than your 8.5t does in yours |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 09 January 2012 : 18:23:12
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| I heard that usin gaffer tape on the inside of the tyres stops the ballooning |
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davecorah
Junior Member
United Kingdom
342 Posts |
Posted - 09 January 2012 : 18:57:07
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| that is one method just needs doing right or it makes little to no difference and can make the tyre really unbalanced weight wise |
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frecklychimp
Average Member
852 Posts |
Posted - 09 January 2012 : 19:19:18
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Where did you hear that one?
I heard that filling your tyres with jelly is better than foam inserts, it has to be the more expensive Rowntrees brand as supermarket own brand breaks up under hard cornering... Strawberry compound is a good starter, blackcurrant compound works best on high grip tracks and orange compound only works on clay tracks!
I'm sure you could use any tape, sellotape, insulation tape, masking tape... but using something thats designed for the job, is graded and can be compared within the industry will help far more and if it works then a consistent quality will be required... B&Q gaffa tape may be a completely different material to 3M stuff that is 5 times the price, for example.
All tyres balloon under load on the cars whilst on the track... the Schumacher SCT tyres have stiff sidewalls with reinforcement and no strengthening ribs etc around the middles... so they stretch under heavy load and balloon, it can be seen whilst cars are on track... also the sidewall diameters front to back are different on SCT tyres/wheels, which means the tyres are under different loads/forces from side to side, which will affect the wear patterns/grip characteristics too.
the minispikes were worse for it under pre-production testing, which is why the drivers were favouring harder blues over yellows... its not a bad thing but belting tape could help control it and give an advantage or better wear rate, so worth trying.
Nope Dave, it's a 9.5T LRP X12 in the back of the truck and has been since the ball diff gear melted with 6.5T on its second meeting, plus it was really screwing up the handling coming out of corners and making front end too light, its much quicker now with a tamer motor.
i've noticed all the Schumacher SCT tyres ae pretty much wearing in the same way at the club on driven wheels... middles going quickly with 2/3 rows barely touched either side |
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ianholt
Average Member
United Kingdom
750 Posts |
Posted - 09 January 2012 : 19:44:35
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| Mine are the same. I have had about 6 club nights and 2 sunday meetings on the same set of mini pins and they are still ok but they are wearing in the middle. |
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