The street lighting
							                                
                                        
                                    
							                        
                    
                            The drive-chain adjustment
							                                
                                        
                                    
							                        
                    
                            The condition of the tyres
							                                
                                        
                                    
							                        
                    
                            The time of day
							                                
                                        
                                    
							                        
                     
	 
	