Nov 14, 2018 · As mentioned in a previous post, I went from the stock 80/100-21 to a 90/100-21 on my trail ridden CRF250X. So a 10mm increase in width and, a 10mm increase in sidewall height. Quite a bit more rubber so meaning: more sidewall height to flex, increased weight and rolling inertia. Difference was immediately noticeable, Feb 15, 2018 · Sizes are 90/90-21 (hard only), 90/100-21 front. 120/90-18, 140/80-18 rear sizes. New Mousse design New mousses are being developed for this tyre – they should be available now with different compounds for hard pack, medium and extreme conditions. Front and rear tread patterns enhance water evacuation and wet grip. Bias-ply construction helps deliver a smooth ride for enhanced comfort. Offset center groove for enhanced straight-line stability. Dunlop performance in a great value package. The D404 is not recommended to be used on Harley-Davidson motorcycles. Apr 28, 2017 · Just put the 90/90 front tire on my Vegas as the older ones came with a 80/90if you have a 80/90 throw it out and buy a 90/90night and day difference in handling and fit and finish even looks better Nylon Thread Size 33 / Tex 35 / Govt. AA - Use needle Sizes 80/12 to 90/14. Nylon Thread Size 46 / Tex 45 / Govt. B - Use needle Sizes 90/14 to 100/16. Nylon Thread Size 69 / Tex 70 / Govt. E - Use needle Sizes 100/16 to 110/18. Please note: Size 69 is the thickest size nylon thread most home sewing machines can handle. 150/90-R15 tires are 2.46 inches (62.4 mm) smaller in diameter than 90/100-R21 tires and the speedometer difference is 8.8% 100/90-R19 tires are 0.71 inches (18 mm) larger in diameter than 90/90-R19 tires and the speedometer difference is 2.7%. 120/70-R21 tires are 0.94 inches (24 mm) larger in diameter than 80/90-R21 tires and the speedometer difference is 3.4%. Pirelli Scorpion Extra X Dirt Bike Front and Rear Motocross Tires Set with Keychain (80/100-21 F 110/90-19 R) 4.7 out of 5 stars 371. $154.99 $ 154. 99. Apr 29, 2003 · I was reading a thread over at Flat Rate Tech that mentioned this subject which inspired my question. An interesting response in the thread was that Ford uses 75W-90 for fuel economy over 80W-90, and that the difference in the weight has little to do with axle load or anything else. That explantion seems consistent with the idea that there cfXNR.