I sold and installed tires for a few years as long as the deformation is an indention,it's ok. It's caused by the overlapping of the sidewall reinforcing material-- less flex when doubled up.
If the deformation protrudes or bulges outward, stop by your tire dealer and get it checked out ASAP this is usually a separation in the making,not a good thing.
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99,QC,3500,Sport Black,4x4,Auto,3. 54,Anti-spin,Camper pkg,Carpet delete,all options except leather.
Silencer ring?? We don't need no stinking silencer ring!!!
Self installed goodies,
OEM Running boards,Mud flaps&Bed liner, Tinted windows,Jacobs E-Brake,BD Torque Loc. Whimpy stock class 4?? hitch fell off-replaced it with a Super Hitch(1200# tongue,15000# trailer) on the house from DC thanks for the recall!!
Installing-Trailer brake controller.
Next-BD Pressure loc and one of those really cool mag hytec transmission pans.