Yes , both inners on my 9870 have done the same. 40ft header and hopper ext probably doesn’t help . Removed the rims and broke the bead on the valve stem side and removed the stem . Drilled end of crack the prepped the crack with grinder and welded them up . Used a file and Dremel to clean up stem hole , put a little silicone on stem and installed it . Guess I’ll find out if it fixes it after harvest this year. New rims at jd $3500 each and they sold 7 last year alone! Combine is new to me so don’t know how long it has been like that, took about 2 weeks for them to lose air tho.