Specialized bike dating
It was the smallest frame they offered (I think 14.5” or 15.5” – will check) and due to its size it has a u brake on the back (under the chain stay) for heel clearance.
This is where the limits of the skinny legged fork start to become apparent: the seals bind slightly as the legs flex, especially when you’re braking on descents...
I have just acquired a old Rock Hopper of by brother.
The bike was originally bought new by my dad and if we remember correctly it would be around 91 or 92.
Even Specialized technical will date it by it components and colour.
I am sure between us we can find it in the brochures/dealer cats and ID it, but a picture would help.