Hello everyone!

I have just got myself a CB750F Boldor 1982 that I will try to give a scrambler look.
To do that I would like to fit a knobly rear tire. But how large (wide) can i go?

Since I have disc brakes rear, there is a strut for the caliper where it seems to be tight.
Maybe someone have a good solution for a rework of the strut maybe?

Some photos of my bike and the strut for the caliper.

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