The EAI Cycling duo conquered the 116km fourth stage, which featured a spectacular 2 000m plunge off the Drakensberg escarpment into KwaZulu-Natal, in a time of 4:24:09.
They charged into the finish at Winterton Country Club a full six minutes and 15 seconds clear of Cannondale-Blend’s Waylon Woolcock and Darren Lill who had shared the overnight lead with them.
The FedGroup-Itec team of Max Knox and Kevin Evans chased Woolcock and Lill to the line to round out the top three a second later.
The crucial stage win cements Rabie and Combrinck’s position at the top of the leaderboard with an overall time of 16:46:53.
Woolcock and Lill drop to second in the standings in 16:53:08, with Evans and Knox ascending to the overall podium in 17:04:43.
After another frosty start in the Free State, the top three teams set a steady pace on the first few climbs, shedding the rest of the field within the first 10 kilometres.
With Woolcock starting to struggle on the ascent up to the Great Wall My China plateau, Rabie and Combrinck used the opportunity to attack and open a gap on their opponents.
They led the charge down Sollie’s Folly and by the first waterpoint at the bottom of Bezuidenhout’s Pass, 44km into the stage, they had extended their lead to a minute and a half.
By the second waterpoint at the 77km mark, the elastic had snapped, with EAI more than three and a half minutes ahead of the chasing teams.
They played it safe on the technical sections but then put the hammer down on the flat roads to open up an unassailable lead towards the finish.
Former road sprinter Rabie, who showed his mountain biking ability over the past four days, said he and Combrinck were very happy with their win.
“We worked well as a team and rode within ourselves today, so that we have something left in the tank for the rest of the tour.”
Rabie said they would certainly not be resting on their laurels in the remaining stages of the Old Mutual joBerg2c and would work hard to preserve their lead.
“With mountain biking, the one thing I’ve learned is that you can have half an hour gap and it doesn’t mean anything. One bad mechanical and that’s it.”
In the mixed category, the stage ended in a dead heat between overall leaders Robyn de Groot and David Cooke (Biogen Toyota) and Yolande de Villiers and Franso Steyn (Sasol Racing Mixed) as both teams crossed the line in 5:07:42.
Stage three winners Leana de Jager and Johan Labuschagne (Sasol Racing) took third on the day in 5:15:21.
Disaster struck however when Cooke was forced out of the race with a suspected broken collarbone.
He and De Groot currently lead the general classification in a combined time of 17:57:07, with De Villiers and Steyn their nearest challengers in 17:58:04.
De Jager and Labuschagne move down into third overall in 18:05:18.
Women’s race leaders Amy McDougall and Janine King (Valencia Girls) took their third consecutive win in 5:32:32 (19:05:15) as the stage podium echoed the overall one.
They opened up a comfortable one-hour overall lead over Brenda Potts and Sarah van Heerden (Old Mutual), who followed them home in 6:06:49 (20:05:34), with Heidi Buttiens and Siegrid van Bever finishing third in 6:42:54 (21:39:37).
The 98km fifth stage is from Winterton to Kamberg on Tuesday.
Men: 1. Johann Rabie & Gawie Combrinck (EAI Cycling) 4:24:09; 2. Waylon Woolcock & Darren Lill (Cannondale-Blend) 4:30:24; 3. Max Knox & Kevin Evans (FedGroup-Itec) 4:30:25; 4. Louis-Bresler Knipe & Craig Boyes (Contego) 4:46:13; 5. Hanco Kachelhoffer & Chris Wolhuter (Karan Beef) 4:46:15
Women: 1. Janine King & Amy McDougall (Valencia Girls) 5:32:32; 2. Sarah van Heerden & Brenda Potts (Old Mutual Girlz) 6:06:49; 3. Heidi Buttiens & Siegrid van Bever (Reevax Ladies) 6:42:54
Mixed: 1. Robyn de Groot & David Cooke (Biogen-Toyota) 5:07:42; 2. Yolande de Villiers & Franso Steyn (Sasol Racing) 5:07:42; 3. Leana de Jager & Johan Labuschagne (Sasol Racing) 5:15:21; 4. Hayley Smith & Darryn Purtell (Bell Equipment) 5:44:37; 5. Alison Richardson & Rob Dormehl (Avis Van Rental) 5:45:39
Men: 1. Johann Rabie & Gawie Combrinck (EAI Cycling) 16:46:53; 2. Waylon Woolcock & Darren Lill (Cannondale-Blend) 16:53:08; 3. Max Knox & Kevin Evans (FedGroup-Itec) 17:04:43
Women: 1. Janine King & Amy McDougall (Valencia Girls) 19:05:15; 2. Sarah van Heerden & Brenda Potts (Old Mutual Girlz) 20:05:34; 3. Heidi Buttiens & Siegrid van Bever (Reevax Ladies) 21:39:37
Mixed: 1. Robyn de Groot & David Cooke (Biogen-Toyota) 17:57:07; 2. Yolande de Villiers & Franso Steyn (Sasol Racing) 17:58:04; 3. Leana de Jager & Johan Labuschagne (Sasol Racing) 18:05:18