MICHELIN offers you this inner tube size 110/100-18 or 110/100-18 or 120/90-18 or 130/90-18 in thickness 4mm. This reinforced inner tube will fit on many front wheel of motocross, enduro. Thanks to its big thickness it will be resistant no matter the shock and even in case of pointed object. We strongly recommend this tube for those who want to be safe in the long run.