If you look at the bottom of the seat tube there is clearly a 18-23 sticker visible, indicating it is made of plain gauge hi-tensile tubing. Nothing wrong with it; I have an 18-23 Pioneer frame which rides fine - but an indication of a low-end spec, along with the "suicide" levers on the brakes. Again, I actually like them for their versatility in hand positions. The bulk of Raleigh's output of "racers" comprised similar bikes, so they are neither rare nor valuable - but are perfectly good bikes all the same. Ideal for worry-free casual everyday use.