Have you tried contacting Sarah in the office?
We normally stock this compound and these sizes. There was a shortage of the 600's for a while back in the summer, but I "think" the factory made another run of them. It is not a popular compound and may be phasing out. I just spoke with a Hoosier rep over the weekend @ PRI and I know they are going to streamline a lot of their product line so they can better meet demand of the more popular moving tires.
Give us a call and Sarah can tell you what we've got here.
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Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cut
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www.CarlsonMotorsports.com
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32 years of service to the karting industry ~ 1Cor 9:24
Linden, IN
765-339-4407
bcarlson@CarlsonMotorsports.com