I know it is politically incorrect to suggest this BUT, there is almost never a good reason to be wearing a seat belt on a tractor. There is only one kind of circumstance where it helps protect you and that is where you need the ROPS to prevent being crushed in a roll-over. In that rare event, you should wear the seat belt, only when you are in danger of rolling the tractor over. In my opinion I should NEVER be operating my tractor where there is significant likelihood of rolling the machine. I have never seen any plausibility argument, much less "proof," that you should wear a seat belt on a tractor. In a car or truck where many high speed objects are around you all the time -- absolutely wear the belt ! On a tractor, NO. I also hold the opinion that a seat belt on a tractor is predominantly a butt covering exercise demanded by lawyers working for the manufacturers.