I have a Dahon Mariner, can I replace 20x1.6" tyre with 20x1.79?
Yes and no.
The width of the tyre is like clothes sizes. What they state is not an exact fit. A brand's 1.79&quot; might measure 1.9&quot; wide and a different brand's 1.79&quot; might measure 1.65&quot;.
You need to have a look at your current setup, check how much extra space you have and decide whether the new tyre will fit. Again, if you think it might be a tight fit, having a wider than stated tyre (virtual 17.9&quot; measuring 1.9&quot;) may not work.
Having mudgards also affects what width tyre you can use.
So I suggest you look at how much room you have to increase tyre size, and take it from there.