pilouface2002 a écrit : tu as l'impression que même avec la couche de parafine, les pneux tiennent mieux la route que les D252, c'est pour dire.
Petit HS mais contrairement à ce que l'on peut lire un peu partout Bridgestone n'utilise ni paraffine, ni démoulant quelconque sur ses presses de vulcanisation (moules) moto. (NB Concernant les autres marques, types de pneu, je n'ai pas d'info officielle mais ce serait étonnant que les procédés soient bien différents).
Par contre, un pneu acheté n'est pas un pneu "fini" apte à attaquer, il faut d'abord faire travailler sa structure/effectuer des cycles de chauffe, pour vulgariser la chose, "terminer la cuisson" et "écailler" la bande de roulement... Par ailleurs, le rôdage puisque l'on parle de cela, sert à placer le pneu dans les gorges de la roue...
Pour ceux qui parlent l'anglais:
Bryn Phillips,Bridgestone Motorcycle Technical a écrit :
Running tyres in:
Running tyres in takes approximately 100 miles and involves more than simply scrubbing-in the tread surface of the tyre. When tyres come out of the mould they have a smooth surface and to obtain optimum grip levels this smooth
surface needs to have it's entire surface scrubbed-in and the best way to achieve this is not to rub the surface with emery paper, but to go for a ride. The first few miles should be spent riding upright so that you have a broad band in the centre that has been scrubbed-in. You can then start
increasing your angle of lean while always keeping a portion of the scrubbed-in area in contact with road. Scrubbing-in can be achieved by an experienced rider in as few as 10 miles, but this does not mean that your tyres will be fully run-in. Running tyres in also involves seating the tyre on the wheel, and this is not achieved simply by fitting the tyre to the
wheel. Running-in also allows all of the components of the tyre to seat in against one another - by overheating a new tyre you can cause lasting damage that means the tyre may not achieve its optimum mileage. While running-in new tyres you should not subject them to hard acceleration or braking
forces.
One final point: Contrary to popular opinion BRIDGESTONE DOES NOT USE RELEASING AGENT ON ITS MOTORCYCLE TYRES. New tyres feel slippery because they are very smooth when they come out of the mould - see above. Riders who
crash on new tyres often try to blame releasing agent for the accident, but if we don't use releasing agent how can this be? Actually, very few people crash on new tyres, most riders are conscientious when running-in their new tyres, but the vast majority of those who do crash on new tyres usually
admit to leaning their bike over at low speeds - junctions and slow roundabouts are the most popular places. Think about it: when travelling at low speed and leaning over there is very little force acting upon a tyre to help it grip the road. Add in a brand new, smooth tread surface and you have a recipe for a sudden slide.