Register Calendar Latest Topics
 
 
 


Reply
  Author   Comment   Page 1 of 2      1   2   Next
blackadder

Avatar / Picture

Metal head
Registered:
Posts: 13,598
Reply with quote  #1 
Found this on the tinterweb another awesome read if I do say so myself. The development of the STS and LTS bikes from the drawing board.... Amazing.

Original site link here http://bullseyedesignworx.blogspot.co.uk/2014/01/gt-bicycles-development-of-sts-1-carbon.html



This is the carbonfiber version of GT's high performance LTS dual suspension mountain bike I designed in the mid nineties. The design process started of with a series of side view hand sketches. As with a number of in house design departments the sketches are just black and white, no time to add color. To speed things up just the frame is drawn on photo copy paper with the wheels, seat, handlebars and already copied onto the page.













After the first few rounds of sketches, a few concepts were selected to be prototyped into models. I did a few more detailed sketches of just the frames to nail down the forms for a reference as I hand built the models.





Then, I got to work building the prototype models. Using metal, wood, bondo, screws, glue and even some very rough welding I created the models.





Having completed developing the frame forms the concepts are ready for paint to make them look more real.





At this point there was a management review and there was a feeling that the designs were too far away from the traditional straight tube look. Compared to bikes now, these concepts are very tame but back then they were a bit edgy. So a more linear concept was developed and a prototype model built to show how it would look in real life.



As is common with most development projects the initial designs are a result of working with a certain premise of how things are going to work. Any of these designs were going to be complicated to manufacture and we were learning more about the molding process which was not going to be easy. This is the point when assumptions are challenged and a fresh look is taken on how to design the product. In this case a handle bar using the same manufacturing process was being looked as a method of making our design easier to make. The bar had metal sleeves that the carbon fiber tube ran through in the center and at the ends where the stem and barends would clamp. If we did the same thing with our problem areas, headtube, seat tube and bottom bracket areas, things would be a lot easier.
Time was passing by and we needed to get it done. So I sketched out a quick design of how we though it was going to look and we ran with it.



In the sketch you can see where I drew what the cross section would look like in various ares of the frame. You can also see the straps from the cnc machined parts that the carbon fiber tube was threaded through. A model was quickly made but never built up. Instead it was cut up to use for reference when modeling the frame in the computer software.

Below is the finished bike, some detail shots of the cnc parts and the bike as it looked as when GT developed it into a down hill bike.









__________________
"There is a secret song at the center of the world and its sound is like razors through flesh." 




 

blackadder

Avatar / Picture

Metal head
Registered:
Posts: 13,598
Reply with quote  #2 
So nobody think this is cool then? Jeez you lot really are hard to please


__________________
"There is a secret song at the center of the world and its sound is like razors through flesh." 




 

Evil

Avatar / Picture

Dared
Registered:
Posts: 4,214
Reply with quote  #3 
Could've sworn I replied to this earlier... [confused]

Very, very cool. an interesting read for sure. I'm not a fan of the ones they put into production though.. In fact only the prototype that was deemed too edgy really appeals.. 

__________________
Never wrestle with a chimney sweep
Bob

Avatar / Picture

Photo Section Moderator
Registered:
Posts: 2,653
Reply with quote  #4 
This has only just come up on my new posts page since Ian bumped it [rofl] Tis some good reading and such a shame they didn't go with the more edgy look, given that when these came out 'edgy' looking things like Mountain Cycles San Andreas had been around a couple of years and were selling well they should really have seen the shift to cooler looking shapes [angel]
__________________
If you try to fail, and succeed, which have you done?
blackadder

Avatar / Picture

Metal head
Registered:
Posts: 13,598
Reply with quote  #5 
I know your not an STS fan matey I appreciate you replying to this. You know I'm a huge STS fan though love most of the designs. But I have to admit the edgy one really was a farking cool design.
__________________
"There is a secret song at the center of the world and its sound is like razors through flesh." 




 

Evil

Avatar / Picture

Dared
Registered:
Posts: 4,214
Reply with quote  #6 
It's just that back end, through my eyes it doesn't gel with the rest (except on some of the prototypes and drawings).. 
Interesting that one of them has a hint of Addiction about it, not enough to make it that appealing but still... 

I think GT make awesome bikes (even the ones I don't like), and a bike to suit everyones type of riding. Sure there's 'better' bikes out there but ain't there always?

__________________
Never wrestle with a chimney sweep
blackadder

Avatar / Picture

Metal head
Registered:
Posts: 13,598
Reply with quote  #7 
Do you like the STS XCR?
__________________
"There is a secret song at the center of the world and its sound is like razors through flesh." 




 

Bob

Avatar / Picture

Photo Section Moderator
Registered:
Posts: 2,653
Reply with quote  #8 
I was thinking Marin Quake for that front end, around the same time of development too.

Marin.jpg 


__________________
If you try to fail, and succeed, which have you done?
blackadder

Avatar / Picture

Metal head
Registered:
Posts: 13,598
Reply with quote  #9 
Quote:
Originally Posted by Bob
I was thinking Marin Quake for that front end, around the same time of development too.

Marin.jpg 


I can see why you said that to be honest.

__________________
"There is a secret song at the center of the world and its sound is like razors through flesh." 




 

Evil

Avatar / Picture

Dared
Registered:
Posts: 4,214
Reply with quote  #10 
Yeah.. I sort of like the XCR. Only problem with it is that the seat tube part looks like a bit of an afterthought, but it's nothing I couldn't live with.

Not sure I've seen a quake before (which means nothing, I don't really remember what I ate yesterday) but the similarity is quite uncanny ain't it... 

__________________
Never wrestle with a chimney sweep
blackadder

Avatar / Picture

Metal head
Registered:
Posts: 13,598
Reply with quote  #11 
I soooooooo need an XCR to complete the set lol. I can see a lot of the quake in the 4th sketch.
__________________
"There is a secret song at the center of the world and its sound is like razors through flesh." 




 

Evil

Avatar / Picture

Dared
Registered:
Posts: 4,214
Reply with quote  #12 
http://for-sale.yakaz.com/xcr-1000-gt-bike#lo=4&docid=000fborofr244o8i
__________________
Never wrestle with a chimney sweep
Evil

Avatar / Picture

Dared
Registered:
Posts: 4,214
Reply with quote  #13 
Wrong one..... http://www.ebay.com/itm/GT-STS-XCR-1000-Bicycle-/111458302453
__________________
Never wrestle with a chimney sweep
blackadder

Avatar / Picture

Metal head
Registered:
Posts: 13,598
Reply with quote  #14 
Sorry, should have said carbon only old chap..... What am I like lol.
__________________
"There is a secret song at the center of the world and its sound is like razors through flesh." 




 

Evil

Avatar / Picture

Dared
Registered:
Posts: 4,214
Reply with quote  #15 
second link..... I guessed carbon was the only way you'd roll.
__________________
Never wrestle with a chimney sweep
Previous Topic | Next Topic
Print
Reply

Quick Navigation:

Easily create a Forum Website with Website Toolbox.