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For any type of off road driving in the UAE you need to reduce your 4x4 tire pressure. For mountains and wadi it's easy to reduce between 20-25 PSI irrespective of the tire brand, shape, type and load. For sand the tire pressure deflation is little bit tricky and if you follow below steps, you can decode this better. Before that you also need to understand that why deflation for off road driving is so important: Deflated tires are hard to sink in or dig in the sand due to lesser resistance. Deflated tires increase the sand flotation to reduce the load on Engine, 4x4 and Transmission. By deflating tire pressure you increase the footprint, that help you stabilize & offer better directional control. Image shows the two tires track: One with 35 PSI (left) and other with 12 PSI (right). Finding a perfect tire pressure for off road driving for your specific tire and 4x4 is based on bit of learning and experiments. Of course the lower the tire pressure better it is for dune bashing, climbing and self recoveries but too low is also dangerous for popping the tire out of its wheel. You can follow the below chart, if you are totally new to off road driving as an indication (ONLY). If you have a pop out on normal driving, then increase 1 PSI next time to find the best tire pressure for your 4x4. If your 4x4 is Long Wheel Base (LWB) with full load then increase 1-2 PSI more than below indications. Type/Brand of Tire Regular Driving Intermediate Driving Self-Recovering All HT Tread (Highway Tread) Dunlop Grandtrek Bridgestone Dueler Yoko Geolander HT Michelin Latitude Pirelli Scorpion Goodyear HT 14 PSI 12 PSI (Avoid sharp steering) 8-10 PSI (Inflate after recovery) All MT Tread (Mud Terrain Tread) Mickey Thompson MT BF Goodrich MT Cooper STT - MT Nitto Trail Grappler MT Toyo Open Country MT Dick Cepek Extreme 12 PSI 10 PSI (Avoid sharp steering) 6-8 PSI (Inflate after recovery) All AT Tread (All Terrain Tread) Yoko Geolander AT Michelin Pilot A/S3 Hankook Dynapro 10-12 PSI 8-10 PSI (Avoid sharp steering) 4-6 PSI (Inflate after recovery) Disclaimer: If you can't find your tire brand in the list then rely on HT / MT / AT section to be 90% safe. For knowing how to deflate the tires, please speak to any of the Marshal or senior member to show you how its done properly. There are more than a couple of ways and tools off-roaders use to deflate depending on their choices. All tools, ways and method are correct as far as you achieve the correct tire pressure. If you are new to offroading, I highly suggest to double check the tire pressure twice once you are done. Borrow the fellow offroader tire pressure gauge and check again, as many times your new gauge might go wonky and give false readings. Once you are 100% sure that your gauge is correct always, then you are fine to rely on your own readings. PLEASE DON'T DEFLATE WITH KEY AND STOPWATCH AND ASSUME IT'S 14 PSI. Secondly, always check / adjust tire pressure again after 30 minutes of sand driving as it might increase due to the heat and stress. If you are facing constant refusal at the beginning of any drive, I bet your 14 PSI has shot up to 18 PSI and you need to reduce the tire pressure more to bring it down to 14 PSI. This happens on almost every newbie drive, so it's fine and proven gazillions of time.