Rear Bump stops

[Singtoe]

I have one from a 96 SR5 (the large one) and one from a 99 limited (the small one).

Which is better?

 

[Gerdo]

The tall one will be softer when the axle comes in contact with it.
The short one will allow more flex before contact, the tall one would limit flex.
I would go with the short one if rock crawling and the tall one if high speed desert running.

I rock crawl and have the short ones. At full flex I just barely touch them and only when it's just tucking one wheel and full droop on the other.