I measured the lugs and they are from .8 to about .95". I am assuming its a worn out 1" track. I'm just looking for a 'guarantee' that the 1.175" studs won't chew up the tunnel or coolers. If someone has run this size with no problems, please let me know. If there is a chance of a problem I'll leave it unstudded. This is my trail sled, not a racer so looking for reliability. Thanks