90/90-R21 tires are 0.71 inches (18 mm) larger in diameter than 80/90-R21 tires and the speedometer difference is 2.6%. For example, an 85% AFUE gas furnace utilizes 85% of the gas to generate heating energy, while 15% goes to waste. Similarly, a 90% AFUE heater utilizes 90% of the fuel towards useful heating while 10% goes to waste. Wasted fuel usually ends up as soot, smoke, and misdirected heat that eventually escapes the house via the chimney.
Which tyre size would be best - 100/90/18, 90/90/18, 100/80/18? 1.3K Views Follow Question Add Answer 8 Answers Dillip | 2 years ago. The recommended tyre size for Honda SP 125 is Front:-80/100-18
DrThumper. With Michelin tires you can go one size higher, as previously mentioned they measure from on top of the knobs. As far as the original question, Khris, go with the 90/90, it will have a lower sidewall for less flexing.your a big guy, you don't want the front tire to flex sideways.
3350 posts · Joined 2009. #23 · Apr 18, 2021 (Edited) I used 90/100 Michelin Enduro tyres for years,but my 500 came with a Metzeler 90/90 front. It didn't give as much comfort as the 90/100's but was more accurate,could change lines faster and best of all I hardly ever lost the front end.
The 350 is delivered with a 90/90/21 and a 140/80/18 in Europe. While it depends on your riding style, liking or just the playground where you ride you can put on a 80/100 or even 90/100 front tyre. Get a 140 rear, no problem. You will find out that a 100/100/18 Dunlop MX52 is as wide as a 140/80/18 Golden Tyre. 120/70-R14 tires are 0.24 inches (6 mm) larger in diameter than 90/90-R14 tires and the speedometer difference is 1.1%.

80/90-R21 tires are 0.94 inches (24 mm) smaller in diameter than 120/70-R21 tires and the speedometer difference is 3.4%.

16. 100/16. 110. 18. 110/18. The size is written as a series of numbers with the European number first, a backslash, and then the American number. For example, 90/14 is a common needle size for sewing where 90 is the European needle size, and 14 is the American size.
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  • 90 100 vs 90 90