In the late 1980s, early 1990s, sub-30 lbs was the reference for a high-quality off-road bike. That&#x27;d be aluminum alloy rims, steel frames (cro-mo alloy) and aluminum bars&#x2F;stems&#x2F;seat-posts. A principle that applies at all times (1800&#x27;s, 1900&#x27;s, 2000&#x27;s), is that rotational mass is what kills you; Roughly, if you can save 1 lb on the wheels, or 1.5 lbs on the frame, save on the wheels. It&#x27;s mass that has to be accelerated&#x2F;decelerated, versus (eg) the frame, which is &#x27;static&#x27;.<p>Edit: qualify &quot;at all times&quot;, &quot;late 80s, early 90s&quot;