It depends on the bobcat and what tire combo setup you’re running. The bobcats with the long axle tubes encountered the most serious issues. But this mostly caused by running foam filled tires and OTT
There’s needs to be room for forgiveness running foam filled or solid tires with OTT setup. Foam filled tires have no forgiveness at all, so when operating off road (as these machines were built for) in rocky environments, there is a high probability that a large enough rock too big to pass through the gaps in the tracks would get inside the tracks. Operator try’s to formate the machine to travel thus jamming the big rock between the tire and tracks. Something has to give and it’s going to be the weak area or part.
The first new holland / Deeres that came out in 94 had thin steel where the axle housings were bolted to the chassis. They often ended up bending the chassis plate area for the axle assembly. The mfg then came out with a thick plate to weld over this area to stiffen the chassis area for the drive axle housing
Bobcats with long axle tubes would get bent. These are welded in and part of the base chassis. Good luck fixing that.
So in that time I just instructed owners to be sure to run the tracks pretty lose to allow room for a rock to pass by the foam filled tire and track.
Then, brawler came out with their solid flex wheel tire setup and we sold the shit of of those. The egg shaped holes cast in the sidewalls saved weight, improved the ride and could be recapped up to four times. Their initial cost was higher than foam filled tires but paid for themselves over time several times over.
I’ve seen bent chassis, bent axle tubes and broken drive chains from running foam filled tires and OTT grousers running foam filled tires.
I highly not recommend running steel OTT with pneumatic tires either. Once a tire gets low on air, the tracks pop it off the rim. Then guess what? You gotta break the tracks down and take them off on the spot to get access to the flat tire. After one or two times with that, customers came back wanting to buy foam filled or solid flex tires.