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It is a bit of an endorsement for RawHyde to switch tires on their bikes. It is vitally important that they use a tire that works in dirt and gives them the most bang for the buck. They are teaching people that have never ridden off road so there must be confidence in the tire grip.
They were originally on Sava knobbies in those were discontinued and they switched to Mitas. So bikes got the knobby versions and others got E07s until the E07 Plus came out I. Wet head sizes. There were mounting 110/150 tires on wet heads as no other sizes from Mitas were available until the Plus came out.