I'm a big fan of b stone ultra hd tubes. I ran them in my drz and never got a flat. I ride rocky rooty nasty new england terrain that loves to pinch flat tubes. My drz weighed close to 500 lbs with my and all my gear on it. I usually ran 10 to 12 psi. I ran one tube on the back for three years!! bstone uhd all the way!! Some guys don't like the weight of the UHD's tho.
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