I have a mountain bike (specialized status 160) that I use for enjoying bike parks, which for those who are not familiar, are basically like ski resorts for mountain bikes (and many of them are in the winter). They can be pretty intense places with jumps, drops, and steeps.

My "park rig" has a very rearward bias. I was able to make it more balanced with an offset bottom bracket (bottom bracket = bearing assembly that threads into the bike frame, holding the cranks in place), moving the cranks 2.5mm forward. You wouldn't think that such a small difference in crank position could make much difference in ride balance, but upon testing I do feel it really brought the bike to life for me and my riding style.

My dilemma is this: with the cranks offset, there now can be a torque about the center of the bottom bracket, which could cause it to slip. The torque is in the direction of loosening. I will hit features up to a 6' drop to flat landing. I don't know what that translates to in terms of peak impact force. To get a ballpark though, I've seen some research papers saying gymnasts landing tricks can generate up to 13x their body weight momentarily (that would by 2600 lbs for me). With a 2.5mm lever arm that would be 29 n*m or 21 lb-ft of torque. I don't want this this to slip on me.

The bottom bracket is a 1.37"x24 threads per inch, and I think it threads in about an inch. My thought is that blue Loctite might not be enough, or might be borderline in being able to hold up to a rough landing without slipping. Permatex orange might be a good option. Red should definitely hold up, but it would not be removable without potentially destroying the heat treat on the aluminum frame. I could go further still and just go ahead and use epoxy or something - my safety might be more important than making the modification reversable. It's not a hugely expensive frame anyway. Then one could make the argument that the bottom bracket slipping could be a good thing or at least not a bad thing, extra one time use suspension in a particularly severe landing! Haha.

I did use blue loctite successfully without slippage, but I avoided any big air time or drops to flat during the time I was testing it. Removing it felt like it was probably more than 21 lb-ft of torque (going by feel, conveniently the wrench I was using is just about a foot long).

I think this whole thing is a big overthink, but I thought to ask here because I figured someone has come across a similar problem in an engineering situation before.