will this tyre fit?
 

hello folks. presently in cameroon on the lookout for a front tyre on my r100gs. have found a 80/100 21 that is suitable for the job and whats more its actually new!! does anyone know if it will stay on the standard tubeless rim, or is it too narow? ta.

It will stay on the rim (use tube).
It's a bit slimmer but the same height.

Good luck!