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I would really appreciate any information that could help to identify this bike frame. I bought the frame at a garage sale and was told the frame was a "specialized" possibly s works but never had anything to back that up. I have done as much research as I can and I now doubt it to be made by specialized. But still have no idea which manufacturer made the frame. I believe it to be roughly early 2000's period bike from geometry, style and hardware compatability. It is a aluminium alloy frame that looks to be hydroformed. It has been tig welded by hand and is a 21" frame that weighs only 1.955 kg or 4lb 3oz. Which seems lightweight to me for a older frame? The serial number is stamped on the bb outer shell parallel to the frame and the number is : SW0401833 please check your bike serial number if anyone has one starting "SW" I would love to know the manufacturer name. The frame has capability to run rim brakes (post mount) or disk calipers. The head tube is semi integrated 50mm outside diameter 44mm inside. The cables are routed on top of the top tube in a cluster of three made of alloy and part of the frame, there are two of these "3 clusters" on the top tube positioned near the headtube and seat post. As far as I know the frame was never painted so possibly came from the factory in bare metal or lacquered finish although that's only an assumption I made from not being able to find a trace of paint or over spray anywhere on the frame including inside of the headtube, bb, or seat tube. I can add any measurements or specific pictures if that would help to narrow it down at all. Please comment if you know anything at all that could help identify this frame. Thanks for looking! (https://i.stack.imgur.com/B591a.jpg)enter image description hereenter image description hereenter image description hereenter image description hereenter image description here

  • Possible duplicate of Why shouldn't I care what model/make/year my bicycle is? – mattnz May 7 at 19:53
  • @David, this is from the Specialized website : Almost all of our serial numbers are located on the bottom bracket shell of the frame. Some newer models will have a non-removable sticker on the down tube near the bottom bracket. Specialized serial numbers typically start with the prefix "WSBC," "WUD," "STT," or "STE." [link] (specialized.com/us/en/faq) feel free to contact them directly with your pics, if anyone should be able to identify a Specialized frame it would be them. – Dan K May 8 at 12:43
  • Seems to be a fairly nice, if a little old Al MTB frame. Nice welds, hydroformed tubes. Can be built up nice if you are cool with rim brakes. Seems to be stripped to bare metal so get it painted or clear-coated soon. – Argenti Apparatus May 8 at 14:35
  • @argenti it has disk brake capability as well as rim brake. Thanks for the comment but doesn't answer my question. Also I stated in my original question I think the frame was sent from factory as bare metal or lacquered finish. Although I cannot confirm this till I identify the frame. – David May 8 at 15:14
  • Some people are asking why you would want to know who manufacturered the frame you own. There are more reasons for wanting to know who made the frame you own than its "rideability" or initial cost. For example if like me you love your frame regardless of whether it's a comp mtb, a cheap generic copy or anywhere inbetween but don't know who made it, obviously makes parts difficult to source, although you can generally get around this with measurement. You can't get round things like original paint or decals or worse still if you're trying to restore or rebuild to original spec you need to know! – David May 8 at 17:31

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