Hi All, My local dealer has some tubes and says they will be fine - but figured I would ask here - on my KTM 200 EXC the tires sizes are as follows: Front is 90/90-21 - can I use a 80/100-21 tube with no issues? Rear is 110/100-18 - can I use a 120/100-18 tube with no issues? TIA
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