You might be Ok with corn starch , unless the tire gets hot . When corn starch gets hot it absorbs moisture from the atmopsphere better , heat increases the corn starches ability to absorb moisture and air is 30% moisture, Knobbies generate a lot of heat on the road., Wet and warm the cornstarch can crosslink and turns to glue.
Does the opposite of what was intended . The glue on envelopes is cornstarch. . I have taken out tubes and wondered what that sticky gunk stuff was and pinned it down to corn starch
I thought the carcinogenic suspect of Talc was still debatable , I'm sure we ride through much worse dust than that.on an average desert ride
you can iuse cornstarch powder
I prefer the talc
from a cloud of dust we race, through it we ride on a narrow dangerous trail, then into the dust we return faster than ever, across the finish line
04 KTM 950 S
04 KTM 525 EXC street plated