Ruota 20" posteriore

  *******   *****    *****    *****       *    *******  
       *   *     *  *     *  *     *     **    *        
      *    *     *  *        *     *    * *    *        
     *      *****   *         ******   *  *    ****     
    *      *     *  *              *  *******  *        
   *       *     *  *     *       *       *    *        
  *         *****    *****    ****        *    *