I use IRC tubes. Here is info on the OEM tubes and IRC replacements:
OEM CST Tires
Front - 100/90-18
Rear - 130/70-17
OEM Tubes (For OEM CST Tires)
Front - 3.00/3.25-18
Rear - 130/70-17
IRC Tubes (For OEM CST Tires)
Front - IRC T20062
Rear - IRC T20051
Joe
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2017 BMW F800GS Adventure
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