Padangų slėgis "trackdays'am"
Posted: 17 Apr 2008, 10:32
Prasom nepatinget paskaityt zemiau Avon padangu speco nuomone apie padangu slegius trackdays'ams (btw - kaip lietuviskai "trackday"?? gal sukuriam koki termina?):
Another widely held misconception is that the psi recommendations are the maximum the tyre can take. They're not. The figure only tells at what pressures the tyres were tested at for all-round use. You could actually safely inflate a tyre up to around 50psi if you really wanted to, although it wouldn't do you much good. But the biggest area for debate has to be track days. If you've ever been to one it's almost certain someone has told you you'll be best off reducing your tyre pressures. You get more grip that way, they tell you. Smith has radically different advice. You should leave them alone, he says. Racing tyres are of a totally different construction and stiffness to road tyres so they need less pressure to maintain the carcass shape. That's where the rumours and bad advice comes from. If you drop the psi in road tyres you will get more movement in the tread pattern. They will heat up too much and that will eat into tyre wear. You'll almost certainly ruin a set in a day without gaining any advantage in grip. " Smith says he's known people to drop their rear tyre to just 22psi when heading for the track. His advice is to leave your tyres alone, saying a good tyre at standard pressures will give more grip than you need on a track day because you almost certainly won't be going as fast or for as long as racers. Track surfaces offer much better grip than the road, too - another reason for leaving your tyre pressures the same for the ride to the track as for the ride around it.
Another widely held misconception is that the psi recommendations are the maximum the tyre can take. They're not. The figure only tells at what pressures the tyres were tested at for all-round use. You could actually safely inflate a tyre up to around 50psi if you really wanted to, although it wouldn't do you much good. But the biggest area for debate has to be track days. If you've ever been to one it's almost certain someone has told you you'll be best off reducing your tyre pressures. You get more grip that way, they tell you. Smith has radically different advice. You should leave them alone, he says. Racing tyres are of a totally different construction and stiffness to road tyres so they need less pressure to maintain the carcass shape. That's where the rumours and bad advice comes from. If you drop the psi in road tyres you will get more movement in the tread pattern. They will heat up too much and that will eat into tyre wear. You'll almost certainly ruin a set in a day without gaining any advantage in grip. " Smith says he's known people to drop their rear tyre to just 22psi when heading for the track. His advice is to leave your tyres alone, saying a good tyre at standard pressures will give more grip than you need on a track day because you almost certainly won't be going as fast or for as long as racers. Track surfaces offer much better grip than the road, too - another reason for leaving your tyre pressures the same for the ride to the track as for the ride around it.
