The 2020 KTM 790 Duke is a middleweight naked bike with a potent 799ccc parallel-twin engine, making the machine ideal for carving canyons or apexes. Front Tire: 120/70ZR-17: Rear Tire: 180 Front Tire (Full Spec) Front Suspension Size (in/mm) 1.7 / 43 2019 KTM Adventure 790 R. $13,499 MSRP. 2019 KTM Adventure 1090 R. $14,999 MSRP. Part #: 644629 Mfg Part #: 4074600. exact fit. Semi-Sintered V Brake Pads - FA244V EBC. $35.14. Part #: 1907486 Mfg Part #: FA244V. Results per Page. Viewing Results 1 - 40 of 117. Prev Next. Shop for 2020 KTM 790 Adventure R products at Dennis Kirk. Gets that tire moved further to the rear a bit which makes more clearance between the tire and swingarm and lengthens the wheelbase slightly. Here is a quick breakdown of the rpm differences: 16/45 to 15/45 = 6.67% higher rpm for given speed in any gear. 16/45 to 15/47 = 11.4% higher rpm for given speed in any gear. 9NjVn.