Niemiecki sprinter otworzył i zamknął rywalizację w wyścigu. Impey został pierwszym od 2013 roku kolarzem spoza Australii, który wygrał klasyfikację generalną.
Szósty etap to 90km po ulicach Adelajdy, na które składało się w sumie 20 okrążeń. Kolarze mogli walczyć na dwóch premiach górskich i dwóch premiach lotnych. 
Tuż po starcie zaatakowała dość spora grupka 13 kolarzy, ale peleton nie dał jej odjechać. Nieco dłuższa akcja pojawiła się na czwartej rundzie, gdy najpierw odjechał Mickael Cherel (AG2R La Mondiale), a za nim pogonili Koen de Kort (Trek-Segafredo) i Manuele Boaro (Bahrain-Merida). Przewaga Francuza osiągnęła nawet 30 sekund, ale na następnym okrążeniu było już po wszystkim.
Na piątym kółku zaatakowali Truls Korsaeth (Astana) i Logan Owen (EF Education First – Drapac p/b Cannondale), a po chwili dojechał do nich Laurent Didier (Trek-Segafredo). Na podjeździe pod premię górską na ósmym okrążeniu trio się rozpadło i na czele pozostał jedynie Owen. Po kilku kilometrach doskoczył do niego Ben O’Connor (Dimension Data). Tym razem przewaga wzrosła nawet powyżej dwóch minut nad peletonem oraz minutę nad goniącym samotnie Antoine Duchesne (FDJ).
Na szesnastej rundzie Owen zaatakował i zostawił O’Connora. Samotna eskapada również się jednak nie powiodła – kolarz EF Education First – Drapac został złapany dwa okrążenia przed końcem. W końcówce kibice podziwiali pasjonującą walkę pomiędzy kolejnymi zespołami o dominację w peletonie. Wydawało się, że wygrali ją kolarze Quick-Step Floors rozprowadzający Elię Vivianiego, ale najszybszy był Andre Greipel (Lotto-Soudal), który o pół koła wyprzedził Caleba Ewana (Mitchelton-Scott) i Petera Sagana (BORA-hansgrohe).
W klasyfikacji generalnej triumfował Daryl Impey (Mitchelton-Scott), który pokonał Richiego Porte (BMC), chociaż obu zmierzono ten sam czas. Trzeci był Tom-Jelte Slagter (Dimension Data).
?? IT'S GREIPEL ON THE LINE ??@CalebEwan is pipped at the post by the great @AndreGreipel, who now has 18 stage wins at the #TDU!!! What a finish to Be Safe Be Seen @MACofSA Stage 6!! pic.twitter.com/P2O3BHThww
— Santos Tour Down Under ?? (@tourdownunder) January 21, 2018
Wyniki ostatniego etapu:
| 1 | Andre Greipel (Ger) Lotto Soudal | 2:01:19 | |
| 2 | Caleb Ewan (Aus) Mitchelton-Scott | ||
| 3 | Peter Sagan (Svk) Bora-Hansgrohe | ||
| 4 | Phil Bauhaus (Ger) Team Sunweb | ||
| 5 | Elia Viviani (Ita) Quick-Step Floors | ||
| 6 | Steele von Hoff (Aus) UniSA-Australia | ||
| 7 | Simone Consonni (Ita) UAE Team Emirates | ||
| 8 | Mads Pedersen (Den) Trek-Segafredo | ||
| 9 | Carlos Barbero Cuesta (Spa) Movistar Team | ||
| 10 | Mads Würtz Schmidt (Den) Katusha-Alpecin | ||
| 11 | Pierre Latour (Fra) AG2R La Mondiale | ||
| 12 | Dries Devenyns (Bel) Quick-Step Floors | ||
| 13 | Mickael Cherel (Fra) AG2R La Mondiale | ||
| 14 | Diego Ulissi (Ita) UAE Team Emirates | ||
| 15 | Jasha Sütterlin (Ger) Movistar Team | ||
| 16 | Gorka Izagirre Insausti (Spa) Bahrain-Merida | ||
| 17 | Jon Izagirre Insausti (Spa) Bahrain-Merida | ||
| 18 | Domenico Pozzovivo (Ita) Bahrain-Merida | ||
| 19 | Egan Arley Bernal Gomez (Col) Team Sky | ||
| 20 | George Bennett (NZl) LottoNL-Jumbo | ||
| 21 | Lukasz Wisniowski (Pol) Team Sky | ||
| 22 | Ruben Guerreiro (Por) Trek-Segafredo | ||
| 23 | Robert Gesink (Ned) LottoNL-Jumbo | ||
| 24 | Nathan Earle (Aus) UniSA-Australia | ||
| 25 | Rudiger Selig (Ger) Bora-Hansgrohe | ||
| 26 | Jay McCarthy (Aus) Bora-Hansgrohe | ||
| 27 | Sam Oomen (Ned) Team Sunweb | ||
| 28 | Chris Hamilton (Aus) Team Sunweb | ||
| 29 | Nathan Haas (Aus) Katusha-Alpecin | ||
| 30 | Enrico Battaglin (Ita) LottoNL-Jumbo | ||
| 31 | Luis León Sánchez (Spa) Astana Pro Team | ||
| 32 | Georg Preidler (Aut) Groupama-FDJ | ||
| 33 | Tom Jelte Slagter (Ned) Dimension Data | ||
| 34 | Mark Renshaw (Aus) Dimension Data | ||
| 35 | Axel Domont (Fra) AG2R La Mondiale | ||
| 36 | Daryl Impey (RSA) Mitchelton-Scott | ||
| 37 | Mitchell Docker (Aus) EF Education First-Drapac p/b Cannondale | ||
| 38 | Maurits Lammertink (Ned) Katusha-Alpecin | ||
| 39 | Salvatore Puccio (Ita) Team Sky | ||
| 40 | Fabio Sabatini (Ita) Quick-Step Floors | ||
| 41 | Marc Soler (Spa) Movistar Team | ||
| 42 | Richie Porte (Aus) BMC Racing Team | ||
| 43 | Adam Hansen (Aus) Lotto Soudal | ||
| 44 | Lars Ytting Bak (Den) Lotto Soudal | ||
| 45 | Brendan Canty (Aus) EF Education First-Drapac p/b Cannondale | ||
| 46 | Daniel Oss (Ita) Bora-Hansgrohe | ||
| 47 | Matteo Montaguti (Ita) AG2R La Mondiale | ||
| 48 | Nelson Oliveira (Por) Movistar Team | ||
| 49 | Yukiya Arashiro (Jpn) Bahrain-Merida | ||
| 50 | Jens Debusschere (Bel) Lotto Soudal | ||
| 51 | Danilo Wyss (Swi) BMC Racing Team | ||
| 52 | Manuele Mori (Ita) UAE Team Emirates | ||
| 53 | Patrick Bevin (NZl) BMC Racing Team | ||
| 54 | Michael Valgren Andersen (Den) Astana Pro Team | ||
| 55 | Alex Frame (NZl) Trek-Segafredo | ||
| 56 | Ben O’Connor (Aus) Dimension Data | ||
| 57 | Manuele Boaro (Ita) Bahrain-Merida | ||
| 58 | Marco Marcato (Ita) UAE Team Emirates | ||
| 59 | Fumiyuki Beppu (Jpn) Trek-Segafredo | ||
| 60 | Eros Capecchi (Ita) Quick-Step Floors | ||
| 61 | Pavel Kochetkov (Rus) Katusha-Alpecin | ||
| 62 | Mathew Hayman (Aus) Mitchelton-Scott | ||
| 63 | Ben Gastauer (Lux) AG2R La Mondiale | ||
| 64 | Niklas Eg (Den) Trek-Segafredo | ||
| 65 | Tiago Machado (Por) Katusha-Alpecin | ||
| 66 | Thomas Scully (NZl) EF Education First-Drapac p/b Cannondale | ||
| 67 | Tom Bohli (Swi) BMC Racing Team | ||
| 68 | Simon Gerrans (Aus) BMC Racing Team | ||
| 69 | Scott Davies (GBr) Dimension Data | ||
| 70 | Maarten Wynants (Bel) LottoNL-Jumbo | ||
| 71 | Nans Peters (Fra) AG2R La Mondiale | ||
| 72 | Owain Doull (GBr) Team Sky | ||
| 73 | Cameron Meyer (Aus) Mitchelton-Scott | ||
| 74 | Enric Mas (Spa) Quick-Step Floors | ||
| 75 | Rubén Fernandez (Spa) Movistar Team | ||
| 76 | Michael Mørkøv (Den) Quick-Step Floors | ||
| 77 | Matthieu Ladagnous (Fra) Groupama-FDJ | ||
| 78 | Koen de Kort (Ned) Trek-Segafredo | ||
| 79 | Alex Porter (Aus) UniSA-Australia | ||
| 80 | Laurent Didier (Lux) Trek-Segafredo | ||
| 81 | Riccardo Minali (Ita) Astana Pro Team | ||
| 82 | Daniel Moreno Fernandez (Spa) EF Education First-Drapac p/b Cannondale | ||
| 83 | Marcel Sieberg (Ger) Lotto Soudal | ||
| 84 | Jacobus Venter (RSA) Dimension Data | ||
| 85 | Nicholas Dlamini (RSA) Dimension Data | ||
| 86 | Alex Edmondson (Aus) Mitchelton-Scott | 0:00:12 | |
| 87 | José Gonçalves (Por) Katusha-Alpecin | 0:00:13 | |
| 88 | Mike Teunissen (Ned) Team Sunweb | 0:00:16 | |
| 89 | Lachlan Morton (Aus) Dimension Data | 0:00:18 | |
| 90 | William Clarke (Aus) EF Education First-Drapac p/b Cannondale | ||
| 91 | Valerio Agnoli (Ita) Bahrain-Merida | ||
| 92 | Nuno Bico (Por) Movistar Team | ||
| 93 | Chad Haga (USA) Team Sunweb | ||
| 94 | Antoine Duchesne (Can) Groupama-FDJ | ||
| 95 | Florian Sénéchal (Fra) Quick-Step Floors | ||
| 96 | Rohan Dennis (Aus) BMC Racing Team | ||
| 97 | Simon Clarke (Aus) EF Education First-Drapac p/b Cannondale | ||
| 98 | Miles Scotson (Aus) BMC Racing Team | ||
| 99 | Timothy Roe (Aus) UniSA-Australia | ||
| 100 | Laurens De Vreese (Bel) Astana Pro Team | ||
| 101 | Michael Storer (Aus) Team Sunweb | ||
| 102 | Stijn Vandenbergh (Bel) AG2R La Mondiale | 0:00:30 | |
| 103 | Tom Leezer (Ned) LottoNL-Jumbo | 0:00:37 | |
| 104 | Nikias Arndt (Ger) Team Sunweb | 0:00:40 | |
| 105 | Jhonatan Restrepo (Col) Katusha-Alpecin | 0:00:42 | |
| 106 | Rui Alberto Faria da Costa (Por) UAE Team Emirates | 0:01:05 | |
| 107 | Ramunas Navardauskas (Ltu) Bahrain-Merida | 0:01:09 | |
| 108 | Artyom Zakharov (Kaz) Astana Pro Team | 0:01:10 | |
| 109 | Thomas De Gendt (Bel) Lotto Soudal | 0:01:20 | |
| 110 | Jaime Castrillo (Spa) Movistar Team | ||
| 111 | Davide Cimolai (Ita) Groupama-FDJ | ||
| 112 | Scott Bowden (Aus) UniSA-Australia | ||
| 113 | Maciej Bodnar (Pol) Bora-Hansgrohe | ||
| 114 | Sam Welsford (Aus) UniSA-Australia | 0:01:31 | |
| 115 | Matteo Bono (Ita) UAE Team Emirates | 0:01:46 | |
| 116 | Robert Wagner (Ger) LottoNL-Jumbo | 0:02:04 | |
| 117 | Daan Olivier (Ned) LottoNL-Jumbo | 0:02:10 | |
| 118 | Zakkari Dempster (Aus) UniSA-Australia | ||
| 119 | Peter Kennaugh (GBr) Bora-Hansgrohe | ||
| 120 | Sam Bennett (Irl) Bora-Hansgrohe | 0:02:19 | |
| 121 | Oscar Gatto (Ita) Astana Pro Team | 0:02:43 | |
| 122 | Truls Engen Korsaeth (Nor) Astana Pro Team | ||
| 123 | Chris Lawless (GBr) Team Sky | 0:03:23 | |
| 124 | Logan Owen (USA) EF Education First-Drapac p/b Cannondale | 0:04:26 | |
| 125 | Damien Howson (Aus) Mitchelton-Scott | 0:04:46 |
Końcowa klasyfikacja generalna:
| 1 | Daryl Impey (RSA) Mitchelton-Scott | 20:03:34 | |
| 2 | Richie Porte (Aus) BMC Racing Team | ||
| 3 | Tom Jelte Slagter (Ned) Dimension Data | 0:00:16 | |
| 4 | Diego Ulissi (Ita) UAE Team Emirates | 0:00:20 | |
| 5 | Dries Devenyns (Bel) Quick-Step Floors | ||
| 6 | Egan Arley Bernal Gomez (Col) Team Sky | ||
| 7 | Gorka Izagirre Insausti (Spa) Bahrain-Merida | ||
| 8 | Luis León Sánchez (Spa) Astana Pro Team | 0:00:23 | |
| 9 | Ruben Guerreiro (Por) Trek-Segafredo | ||
| 10 | Robert Gesink (Ned) LottoNL-Jumbo | 0:00:24 | |
| 11 | George Bennett (NZl) LottoNL-Jumbo | ||
| 12 | Jon Izagirre Insausti (Spa) Bahrain-Merida | ||
| 13 | Pierre Latour (Fra) AG2R La Mondiale | ||
| 14 | Domenico Pozzovivo (Ita) Bahrain-Merida | ||
| 15 | Sam Oomen (Ned) Team Sunweb | ||
| 16 | Chris Hamilton (Aus) Team Sunweb | ||
| 17 | Enric Mas (Spa) Quick-Step Floors | ||
| 18 | Ben O’Connor (Aus) Dimension Data | 0:00:26 | |
| 19 | Jay McCarthy (Aus) Bora-Hansgrohe | 0:00:29 | |
| 20 | Mickael Cherel (Fra) AG2R La Mondiale | ||
| 21 | Nathan Earle (Aus) UniSA-Australia | ||
| 22 | Brendan Canty (Aus) EF Education First-Drapac p/b Cannondale | ||
| 23 | Scott Davies (GBr) Dimension Data | 0:00:45 | |
| 24 | Daniel Moreno Fernandez (Spa) EF Education First-Drapac p/b Cannondale | 0:00:57 | |
| 25 | Cameron Meyer (Aus) Mitchelton-Scott | 0:01:01 | |
| 26 | Michael Valgren Andersen (Den) Astana Pro Team | 0:01:12 | |
| 27 | Lars Ytting Bak (Den) Lotto Soudal | 0:01:22 | |
| 28 | Georg Preidler (Aut) Groupama-FDJ | 0:01:26 | |
| 29 | Eros Capecchi (Ita) Quick-Step Floors | 0:01:28 | |
| 30 | Rohan Dennis (Aus) BMC Racing Team | 0:01:46 | |
| 31 | Laurent Didier (Lux) Trek-Segafredo | 0:01:57 | |
| 32 | Peter Sagan (Svk) Bora-Hansgrohe | 0:02:25 | |
| 33 | Adam Hansen (Aus) Lotto Soudal | 0:03:04 | |
| 34 | Marc Soler (Spa) Movistar Team | 0:03:09 | |
| 35 | Rui Alberto Faria da Costa (Por) UAE Team Emirates | 0:03:11 | |
| 36 | Niklas Eg (Den) Trek-Segafredo | 0:05:24 | |
| 37 | Maurits Lammertink (Ned) Katusha-Alpecin | 0:06:16 | |
| 38 | Simon Clarke (Aus) EF Education First-Drapac p/b Cannondale | 0:06:28 | |
| 39 | Manuele Mori (Ita) UAE Team Emirates | 0:06:34 | |
| 40 | Stijn Vandenbergh (Bel) AG2R La Mondiale | 0:06:53 | |
| 41 | Simon Gerrans (Aus) BMC Racing Team | 0:07:06 | |
| 42 | Timothy Roe (Aus) UniSA-Australia | 0:07:42 | |
| 43 | Yukiya Arashiro (Jpn) Bahrain-Merida | 0:09:00 | |
| 44 | Marco Marcato (Ita) UAE Team Emirates | 0:09:57 | |
| 45 | Owain Doull (GBr) Team Sky | 0:10:30 | |
| 46 | Valerio Agnoli (Ita) Bahrain-Merida | 0:10:34 | |
| 47 | Lachlan Morton (Aus) Dimension Data | 0:11:01 | |
| 48 | Michael Storer (Aus) Team Sunweb | 0:11:02 | |
| 49 | Ben Gastauer (Lux) AG2R La Mondiale | 0:11:20 | |
| 50 | Rubén Fernandez (Spa) Movistar Team | 0:11:24 | |
| 51 | Enrico Battaglin (Ita) LottoNL-Jumbo | 0:11:43 | |
| 52 | Koen de Kort (Ned) Trek-Segafredo | 0:12:00 | |
| 53 | Laurens De Vreese (Bel) Astana Pro Team | 0:12:41 | |
| 54 | Mike Teunissen (Ned) Team Sunweb | 0:12:47 | |
| 55 | Nathan Haas (Aus) Katusha-Alpecin | 0:13:45 | |
| 56 | Nikias Arndt (Ger) Team Sunweb | 0:13:46 | |
| 57 | Danilo Wyss (Swi) BMC Racing Team | 0:13:47 | |
| 58 | Tiago Machado (Por) Katusha-Alpecin | 0:13:50 | |
| 59 | Nelson Oliveira (Por) Movistar Team | 0:14:18 | |
| 60 | Mathew Hayman (Aus) Mitchelton-Scott | 0:15:30 | |
| 61 | Daniel Oss (Ita) Bora-Hansgrohe | 0:15:43 | |
| 62 | Miles Scotson (Aus) BMC Racing Team | 0:16:09 | |
| 63 | Fumiyuki Beppu (Jpn) Trek-Segafredo | 0:16:22 | |
| 64 | Salvatore Puccio (Ita) Team Sky | 0:16:32 | |
| 65 | William Clarke (Aus) EF Education First-Drapac p/b Cannondale | 0:16:34 | |
| 66 | Jhonatan Restrepo (Col) Katusha-Alpecin | 0:17:02 | |
| 67 | Nuno Bico (Por) Movistar Team | 0:17:15 | |
| 68 | Maarten Wynants (Bel) LottoNL-Jumbo | 0:17:19 | |
| 69 | Daan Olivier (Ned) LottoNL-Jumbo | 0:17:46 | |
| 70 | Steele von Hoff (Aus) UniSA-Australia | 0:18:32 | |
| 71 | Artyom Zakharov (Kaz) Astana Pro Team | 0:18:36 | |
| 72 | Jasha Sütterlin (Ger) Movistar Team | 0:19:55 | |
| 73 | Tom Leezer (Ned) LottoNL-Jumbo | 0:20:18 | |
| 74 | Tom Bohli (Swi) BMC Racing Team | 0:20:20 | |
| 75 | Michael Mørkøv (Den) Quick-Step Floors | 0:21:05 | |
| 76 | Alex Edmondson (Aus) Mitchelton-Scott | 0:22:55 | |
| 77 | Caleb Ewan (Aus) Mitchelton-Scott | 0:23:01 | |
| 78 | Carlos Barbero Cuesta (Spa) Movistar Team | 0:23:27 | |
| 79 | Matteo Montaguti (Ita) AG2R La Mondiale | 0:23:34 | |
| 80 | Matthieu Ladagnous (Fra) Groupama-FDJ | 0:23:46 | |
| 81 | Thomas Scully (NZl) EF Education First-Drapac p/b Cannondale | 0:24:01 | |
| 82 | Elia Viviani (Ita) Quick-Step Floors | 0:24:12 | |
| 83 | Mitchell Docker (Aus) EF Education First-Drapac p/b Cannondale | 0:24:22 | |
| 84 | Nans Peters (Fra) AG2R La Mondiale | 0:24:45 | |
| 85 | José Gonçalves (Por) Katusha-Alpecin | 0:24:58 | |
| 86 | Jacobus Venter (RSA) Dimension Data | 0:25:27 | |
| 87 | Patrick Bevin (NZl) BMC Racing Team | 0:27:13 | |
| 88 | Zakkari Dempster (Aus) UniSA-Australia | 0:28:13 | |
| 89 | Simone Consonni (Ita) UAE Team Emirates | 0:28:20 | |
| 90 | Matteo Bono (Ita) UAE Team Emirates | 0:28:25 | |
| 91 | Peter Kennaugh (GBr) Bora-Hansgrohe | 0:28:40 | |
| 92 | Manuele Boaro (Ita) Bahrain-Merida | 0:29:06 | |
| 93 | Pavel Kochetkov (Rus) Katusha-Alpecin | 0:29:24 | |
| 94 | Chad Haga (USA) Team Sunweb | 0:30:35 | |
| 95 | Mark Renshaw (Aus) Dimension Data | 0:30:48 | |
| 96 | Andre Greipel (Ger) Lotto Soudal | 0:31:08 | |
| 97 | Thomas De Gendt (Bel) Lotto Soudal | 0:31:21 | |
| 98 | Antoine Duchesne (Can) Groupama-FDJ | 0:33:18 | |
| 99 | Nicholas Dlamini (RSA) Dimension Data | 0:33:40 | |
| 100 | Lukasz Wisniowski (Pol) Team Sky | 0:33:55 | |
| 101 | Alex Porter (Aus) UniSA-Australia | 0:34:27 | |
| 102 | Axel Domont (Fra) AG2R La Mondiale | 0:35:10 | |
| 103 | Oscar Gatto (Ita) Astana Pro Team | 0:35:45 | |
| 104 | Riccardo Minali (Ita) Astana Pro Team | 0:35:46 | |
| 105 | Fabio Sabatini (Ita) Quick-Step Floors | 0:36:12 | |
| 106 | Florian Sénéchal (Fra) Quick-Step Floors | 0:36:16 | |
| 107 | Jaime Castrillo (Spa) Movistar Team | 0:37:01 | |
| 108 | Rudiger Selig (Ger) Bora-Hansgrohe | 0:38:14 | |
| 109 | Marcel Sieberg (Ger) Lotto Soudal | 0:39:07 | |
| 110 | Truls Engen Korsaeth (Nor) Astana Pro Team | 0:39:09 | |
| 111 | Damien Howson (Aus) Mitchelton-Scott | 0:39:39 | |
| 112 | Maciej Bodnar (Pol) Bora-Hansgrohe | 0:39:51 | |
| 113 | Robert Wagner (Ger) LottoNL-Jumbo | 0:41:09 | |
| 114 | Mads Würtz Schmidt (Den) Katusha-Alpecin | 0:41:24 | |
| 115 | Chris Lawless (GBr) Team Sky | 0:41:25 | |
| 116 | Mads Pedersen (Den) Trek-Segafredo | 0:41:33 | |
| 117 | Logan Owen (USA) EF Education First-Drapac p/b Cannondale | 0:41:46 | |
| 118 | Jens Debusschere (Bel) Lotto Soudal | 0:41:49 | |
| 119 | Scott Bowden (Aus) UniSA-Australia | 0:43:13 | |
| 120 | Phil Bauhaus (Ger) Team Sunweb | 0:45:21 | |
| 121 | Alex Frame (NZl) Trek-Segafredo | 0:47:29 | |
| 122 | Sam Bennett (Irl) Bora-Hansgrohe | 0:53:09 | |
| 123 | Ramunas Navardauskas (Ltu) Bahrain-Merida | 0:55:28 | |
| 124 | Sam Welsford (Aus) UniSA-Australia | 0:56:34 | |
| 125 | Davide Cimolai (Ita) Groupama-FDJ | 0:59:55 |
