Tiffany Cromwell (Canyon-SRAM zondacrypto) and Mark O'Brien (Trappist) clinch the 2025 title at the AusCycling Gravel National Championships in South Australia at Ponderosa Pines (Image credit: James Raison / AusCycling) The AusCycling National Gravel Championships is set to unfold in South Australia this weekend, positioned in a slot in the calendar which means some of Australia's more decorated gravel cyclists have had to make a difficult choice this year – race the world's most revered gravel event, Unbound , or chase the green and gold stripes. Defending champions Mark O'Brien and Tiffany Cromwell – a repeat winner at Unbound 100 – will be lining up in Ponderosa Pines this weekend, though 2024 victors Courtney Sherwell and Brendan Johnston – who just added another UCI Gravel World Series victory to his tally at SEVEN in Nannup earlier this month – will both be in Kansas. The latest race content, interviews, features, reviews and expert buying guides, direct to your inbox!…