Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

KVA tubing?

Old 10-18-10, 09:45 PM
VT Biker
Senior Member
Thread Starter
VT Biker's Avatar
Join Date: Apr 2006
Location: Denver, CO
Posts: 1,961

Bikes: Cannondale R700 (2005)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
KVA tubing?

I was doing some research on tubing, and came across this new entrant into the stainless steel market.

I guess I would be curious to know what the current builders out there think of this tubing, and its advantages and disadvantages.

In addition - as someone looking into a Ti frame initially, the claims seem to be that these new steels are not only stronger than Ti, but are more durable and fatigue resistant.

A) What is your opinion on these tubes in general as compare to Ti?
B) What tubes offer a stiffer frame (all other things being equal)?

VT Biker
VT Biker is offline  
Old 10-19-10, 05:04 AM
THE Materials Oracle
Falanx's Avatar
Join Date: Feb 2006
Location: Finally... home :-)
Posts: 502

Bikes: Univega Alpina 5.1 that became a 5.9, that became a road bike... DMR TrailStar custom build

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
KVA aren't new to the market, they've been trying to sell their new technology to various interested parties for some time, but the Ford snub was a quite a blow, moreso, a stupid and ill-thought out one on Ford's part.

As a general rule, most steels are more durable and fatigue resistant than titanium alloys. Both have actual definable fatigue lives, unlike aluminium and magnesium alloys, and carbon fibre composites. Steels lives are higher than titanium alloys of the same strength level, and most steel alloys are readily hardenable to higher strengths and toughnesses than titanium alloys. Where titanium sells is specific strength. But that's another discussion.

A) They interest me, not so much in their exact present behaviour, but their chemistry, which seems to be a littlemore difficult to determine by guesswork than Reynolds 953. What alloy(s) is/are being used to make their line to bicycle tubesets, and what possible chemistry improvements could potentially be made still for reasonable ROI? The initial intention was to manufacture tubing that would be as low-cost as possible, but the thing about steels is that the slightest addition of another element that does not alter the unit price significantly can have profound effects on thermomechanical behaviour.

B) Stiffness is one of the most hotly debated topics still in framebuilding. It's not even the right word, but we make do with it. Stiffness is really a solid material mechanical parameter. 'Rigidity' would serve us better to define how compliant a frame is or isn't. But: Do you really seek maximum stiffness? How stiff is too stiff? What tubeset dimensions are available - this above all else has the most effect on a tubeset rigidity. Taking two identically drawn tubes, one in a titanium alloy and one in a steel, the steel will have a higher rigidity, as steels' Young Modulus is about 195% that of titanium and its alloys.
Falanx is offline  
Old 10-19-10, 08:44 AM
Senior Member
Join Date: Dec 2005
Posts: 7,859
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Interesting product, thanks
ultraman6970 is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.