I picked up this Klein Quantum Race in February without wheels or chain - from a picker through a charity store. Just spent a couple weeks riding it, and I'm impressed.
It's a smooth and efficient ride, with none of the harshness that a couple of folks had suggested.
MAYBE even nicer than my Cannondales - though my newest Cannonball is a '94 2.8, so not a contemporary comparison.

Got a question for the Klein experts. Reading through the Klein catalogs, it looks like they speced their frame sizes in odd numbers.
https://www.vintage-trek.com/Trek-Fis.../1998klein.pdf
This one's stamped (in a different stamp than the rest of the serial number) as a 60 and several of the dimensions are neither between 59 and 61 and outside both of those. Crank height is high, standover is low, and top tube is short. Custom frame or just an odd day?

I have to admit that I was happy that it didn't have the propitiatory Klein headset or BB, but the touches like rear entry dropout and internal cable routing are very nice. I guess Trek was "helping" them even though the bikes were still being made in Washington.

The catalog claims that it's a 18 pound bike, but I found it an HONEST 20.0 pound bike, which makes it my lightest bike - including two molded carbon fiber frames.

More photos here




More photos here