185/70-R14 tires are 3.68 inches (93.5 mm) smaller in diameter than 235/75-R14 tires and the speedometer difference is 13.2%. Tools & Tech: 175-65R14 tire size comparison with 1010tires.com Tire Size calculator. Use our tire calculator to compare tire sizes based on tire diameter, radius, sidewall height, circumference, revs per mile and speedometer difference. 185/75-R14 tires are 0.1 inches (2.5 mm) smaller in diameter than 175/80-R14 tires and the speedometer difference is 0.4% 6472. Better Fuel Economy Factory Ratios Increased Power. vs 185/65-14 vs 185/70-14 vs 175/65-14 vs 185/65-15. 185/70-R14 tires are 0.55 inches (14 mm) larger in diameter than 175/70-R14 tires and the speedometer difference is 2.3%. Jan 23, 2017 · As Swift Vxi rather comes in R14 165/80 as stock Size and people go on to upsize rather go in to. > Upsize Wheels to 15 Inch. > Also simultaneously upsize Tyre to 185/65. This is rather the optimum size for Increased Grip, Handling and is what also there in Swift Zxi Model. However - where you intend to retain existing 14 Inch Wheels and only JK UX ROYALE 175/65 R15. Tubeless. Rs. 4325. View December Offers. JK UX ROYALE 175/70 R14. Tubeless. Rs. 4120. View December Offers. JK UX ROYALE 175/65 R14. 185/65-R15 tires are 0.82 inches (20.9 mm) larger in diameter than 175/70-R14 tires and the speedometer difference is 3.4%. 185/70-R14 tires are 0.14 inches (3.5 mm) smaller in diameter than 175/75-R14 tires and the speedometer difference is 0.5%. 155/65 r14 -2.3% 165/60 r14 -2.8% 165/70 r14 +3% 175/60 r14 -0.7% 175/65 r14 +2.3% 185/55 r14 -1.9% 185/60 r14 +1.4% 195/60 r14 +3.5% 205/55 r14 +1.9% 185/60-R14 tires are 0.09 inches (2.4 mm) larger in diameter than 175/70-R13 tires and the speedometer difference is 0.4% zssk.