Added explain bloc for Wheels

src/App.css

@@ -14,7 +14,6 @@
 .table-centered>tbody>tr>td{text-align:center}
 
 figure{
-  margin:10px;
   padding:10px;
   background:#fff;
   border:1px solid #dadada;

src/components/Wheels/index.js

@@ -1,6 +1,7 @@
 import React, { Component } from 'react';
 import { Container, Row, Col, Table, FormGroup, Input, Button } from 'reactstrap';
 import Result from "./results"
+import Explain from "./explain"
 
 import 'bootstrap/dist/css/bootstrap.min.css';
 import '../../App.css';
@@ -243,6 +244,7 @@ Calculez vos futures jantes et futurs pneus en ligne
           :
           (null)
         }
+        <Explain />
       </Container>
     );
   }