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Roues et pneus
10 Roues et pneus
10.1 Roues
10.1.1 Principes de base
La roue est constituée du moyeu, des rayons et de la jante.
Le pneu est monté sur la jante de la roue. En fonction du modèle,
il y a une chambre à air dans le pneu. La roue et le pneu montés
à l’avant constituent la roue avant. La roue et le pneu montés à
l’arrière constituent la roue arrière.
Quand on utilise une chambre à air, il y a un ruban sur la jante
servant à protéger la chambre à air du fond de la jante et des
écrous de rayons.
Quand il n’y a pas de chambre à air, on utilise des « boyaux »
pour les vélos de course ou des pneus UST (UST = Universal
System Tubeless) pour les VTT.
Fig. : Section de roue avec pneus (exemple)
1 Rayon
2 Jante
3 Ruban de jante
4 Flanc de jante
5 Chambre à air
6 Enveloppe
7 Surface de roulement
1
2
4
5
6
7
3
Les roues sont soumises à d’importantes sollicitations en raison du
poids du cycliste et des bagages ainsi que de l’état de la chaussée.
Faites contrôler et recentrer les roues par votre vélociste, à
l’issue de la phase de rodage (au plus tard, au bout de 300 km,
15 heures d’utilisation ou 3 mois, selon le cas).
Contrôlez régulièrement les roues après la phase de rodage.
Si vous ne disposez pas des connaissances spécifiques ni des
outils nécessaires, faites contrôler et recentrer éventuellement
les roues par votre vélociste.
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