Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  

Go Back   > >

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.

User Tag List

Thread Tools Search this Thread
Old 01-09-13, 07:52 AM   #1
Lover of Old Chrome Moly
Thread Starter
Myosmith's Avatar
Join Date: May 2011
Location: NW Minnesota
Posts: 2,548
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Chrome Moly vs. HiTen fork

I wasn't sure where to post this but it seemed to be more of a frame builder question than a mechnic question so I thought I'd try it here first.

I've got a 1990 Trek 700 frameset with the chrome-moly main tubes and the hi-ten fork. The 730 of that year came with a chrome-moly fork. I can get a chrome-moly fork that is a nearly exact replacement for the original but I'm wondering just how much of a difference in weight, comfort and strength it would make to replace the hi-ten with chro-mo. The reason I ask is that the original fork received some cosmetic damage last summer and I'm looking at repainting it (too much damage for a decent touch up, but LBS says fork is structurally fine). I can upgrade to chro-mo for about $60 but I'm wondering if it is worth it.

Myosmith is offline   Reply With Quote
Old 01-09-13, 09:10 AM   #2
Decrepit Member
Scooper's Avatar
Join Date: Aug 2005
Location: San Francisco California
Bikes: Waterford 953 RS-22
Posts: 10,247
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 160 Post(s)
Hi-ten has a lower yield strength than chromoly, so for the hi-ten fork blades to resist permanent bending in a collision for example, the wall thickness for blades of similar outside dimensions would have to be thicker (and therefore heavier) for a hi-ten fork than for a chromoly fork. Also, because the hi-ten blades have thicker walls, the fork won't have the flexibility and resilience of a chromoly fork.

IMHO, for $60 it would be a worthwhile upgrade.
- Stan
I'm with her.
Scooper is offline   Reply With Quote
Old 01-09-13, 04:12 PM   #3
Senior Member
Join Date: Jul 2011
Posts: 2,410
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
The variation in tube thickness tends to be that the tube needs to be twice as thick in order to be the same strength, but that does not mean the whole thing will weigh twice as much, due to the weight of other common components and whether design wise strength is the governing design factor, and depending on how much of the upgrade fork is upgraded to chromo at a lower weight.
MassiveD is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

All times are GMT -6. The time now is 09:37 AM.