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Chromoly Seat Tube

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Chromoly Seat Tube

Old 09-27-18, 03:30 PM
  #1  
Oakman
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Chromoly Seat Tube

This is the only decal pertaining to my GT Outpost bike construction. Does this mean the seat tube is the only piece that is made with Ishiwata chromoly steel? If so, is the seat tube really that critical?

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Old 09-27-18, 08:28 PM
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That should be for all of the tubes... double butted-- pretty sure my old Panasonic was Ishiwata.
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Old 09-27-18, 08:41 PM
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Ah, the lure of CroMo stickers. When I was repping I had to sit through meetings where reps would beg production guys to get stickers that said "CroMo Tubing" so they would not have to admit that all the CroMo was just in one tube. They counted on people not looking too closely or asking too many questions. Bike company has a bike that says CroMo, price is lower than it would be with more of the better tubing in the bike, everyone's happy---except maybe the buyer who got fooled or didn't care.

It's like those Thinsulate labels on some garments; you have to think that all the Thinsulate is in the label. I feel that was about some tubing stickers on bikes; all the CroMo is in the sticker.

Last edited by thumpism; 09-27-18 at 08:45 PM.
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Old 09-28-18, 06:55 AM
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"Label Made in USA".....

To fill in the OP, a lot of the bottom and near-bottom end, "just above department store quality", of that era had only a CrMo seat tube. It just means the rest of the frame is hi-ten steel (thus "just above dept store"). Typically accompanied by Shimano 100GS derailleurs, etc. We have a couple old Trek 800s with frames with CrMo seat tubes. That Outpost is another example. My Outpost Trail and GT Talera have all CrMo main tubes. That plain "Outpost" is just a bit more product differentiation, and a way to get the GT triple-triangle (it is a TT, right?) frame design into an entry-level bike.
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Old 09-28-18, 08:09 AM
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unterhausen
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that's funny, I didn't know bike companies did that. I suppose it's so the seat tube can be thinner?
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Old 09-28-18, 09:43 AM
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Originally Posted by McBTC View Post
That should be for all of the tubes... double butted-- pretty sure my old Panasonic was Ishiwata.
It shouldnt be for all the tubes because it specifically states just 1 tube. Sometimes the sticker will declare tubing for the main triangle thus insinuating that the rear triangle is generic cromo. Marketing at its best.
Also, Ishiwata made all sorts of tubing- triple butted, double butted, plain gauge, and different butting profiles too for each.
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Old 09-28-18, 10:27 AM
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^^^^ And most likely, since the label is "silent" about the wall type (and given the model of bike), you can be pretty sure it's plain gauge.
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Old 09-28-18, 10:29 AM
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If more than just the seat tube was cro-mo, they'd let you know. It's the cheapest way to put a cro-mo sticker on the frame.
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Old 09-28-18, 11:13 AM
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Originally Posted by madpogue View Post
"Label Made in USA".....

To fill in the OP, a lot of the bottom and near-bottom end, "just above department store quality", of that era had only a CrMo seat tube. It just means the rest of the frame is hi-ten steel (thus "just above dept store"). Typically accompanied by Shimano 100GS derailleurs, etc. We have a couple old Trek 800s with frames with CrMo seat tubes. That Outpost is another example. My Outpost Trail and GT Talera have all CrMo main tubes. That plain "Outpost" is just a bit more product differentiation, and a way to get the GT triple-triangle (it is a TT, right?) frame design into an entry-level bike.
It does seem to be a cheaper model - GT All Terra - and it is the only such model I've seen that ISN"T a TT frame.
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Old 09-28-18, 11:29 AM
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The frame design is more a generational thing. That must be a pretty early one, mid-'80s probably. By the early '90s, even the entry-level Outposts etc. were TT. Still a nice bike; GT was a great brand BITD.
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