Metric size for front tire!!

[t0mmy]

Hi Guys,

I'm looking for a replacement tire for my front Dunlop K81. Its a 3.60, 18incher. Does anyone out there know the metric convertion for this slag? I've been looking at conversion charts online and It doesn't mention 3.60, just 3.5-4.0

Am I safe to go with the 3.50 or will I be struggling to wrap that round the rim?

Many thanks!

 

[XSLeo]

First question. is 3.60 somewhere between 3.50 and 4.00?
To convert inches to mm multiply the inches by 25.4 because 25.4 mm is an inch.
So a 3.60 inch tire is 3.6 inches x 25.4 = 91.44 mm Or just call it a 90. Metric sizes also give the aspect ratio and rim size. So the 3.60-18 becomes a 90/90-18.
A 4.00-18 tire will be a 100/90-18.
Either tire size should be fine.
Leo

 

[Pork Chop]

I have 3.0x18 on the front and it is fine.

 

[johnboy]

closest size is listed at 3.50 would be a 100/80 or 90-18
3.75 to 4.00 =110/ -18