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  1. #1
    Senior Member New to bikes's Avatar
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    Just got a GT STS Carbon Fibre/ Aluminum bike

    I just got this GT STS carbon fibre/aluminum bike. I would like to find out more about it the year and so on.
    Would also like to know if it is worth riding around
    I should clear up it is almost a bike. It came with the frame rear wheel, 8 speed cassette, rear suspension, front suspension, rear derailleur, chain, hydraulic brakes and a little black tube between the front forks.
    The bike needs a bottom bracket, crank front wheel and seat/seat post.
    If the bike is worth finding the parts would be great to know how many teeth on the chain ring.
    If I build this bike back up it would be a city mountain bike meaning if I go riding through a park and want to zip down to a lake, pound river or whatever I would. Or hit the park trails. I would not be bringing it up to a ski hill or any real mountain bike trails
    I should mention that I received it for free
    Any/all info would be greatly appreciated
    Scott
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  2. #2
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    I'd ditch the front suspension fork for a carbon rigid fork.

    You'll need an MTB triple crankset 44/32/22 and a good quality front wheel. I'd advise getting a carbon seatpost and getting an eccentric bottom bracket should you ever want to run it as a SS, in which case, you can just get one chainring and a flip flop hub.

    If you want to run it as an urban rig, I'd recommend a Brook B-17 as your bike already has rear suspension and a cruiser bar for a more upright position on city streets. I'd have the knobbies replaced with Continental Country Town Ride tires or if your budget permits, with Schwalbe Big Apples. Balloon tires work really well on potholed city streets and they're fast rolling.

    Good luck with your GT build.

  3. #3
    To be continued Dannihilator's Avatar
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    Umm, no rigid front for on a bike that has rear suspension isn't right, especially when the frame is an old DH bike.

    That bike will have the pedaling characteristics of a trampoline in regards to city riding and a carbon rigid fork will make that worse and throw off the bike's geometry.

    OP that bike is likely overkill for what you're looking for and if you are to use it for what it's designed for, you'll be limited in what trails you can run it on, since a lot of bikeparks and DH shuttle spots are a bit more advanced from the days that STS carbon was being used by the GT factory team for world cup dh.
    Last edited by Dannihilator; 07-14-14 at 10:13 PM.
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  4. #4
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    An MTB can be converted to urban service.

    It won't go fast but it would be a pot hole crasher and if the frame was tough enough for DH runs, it'll be more than tough enough for city streets.

    The OP isn't looking for a road bike.

  5. #5
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    GT STS DH Lobo

    That thread has a lot of info about it. It is a cool old bike and you can't beat free but it is vastly VASTLY overkill for tooling around on park paths. It would be overkill for normal mtn bike trails.

  6. #6
    Pint-Sized Gnar Shredder Zephyr11's Avatar
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    Quote Originally Posted by NormanF View Post
    An MTB can be converted to urban service.

    It won't go fast but it would be a pot hole crasher and if the frame was tough enough for DH runs, it'll be more than tough enough for city streets.

    The OP isn't looking for a road bike.
    Yeah, but for what it would cost to fix, what the bike is, and what the OP wants to use it for, he'd be better off flipping it and looking for a hardtail.

  7. #7
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    Much as that's an awesome bike, it's a really bad one to try to turn into anything other than what it was originally designed for, which is full on DH riding. The spec puts it at late 90's probably 1998 (1998 GT STS-Lobo DH - BikePedia).

    For the suggestions above for a rigid fork, and triple crank, both are bad ideas, as #dannihilator notes, it will give a really bad ride with the rear suspension, and DH bikes were/are designed for single ring up front, so no triples. your missing the chain guide, and modern ones normally used the ISGC mount, which this bike pre-dates, souring this and any other parts needed could be a issue.

    Best option if you just want a bike to use as a runaround would be to flip, or break, and sell the parts as they are probably worth more than the bike in the photo condition.

  8. #8
    Senior Member New to bikes's Avatar
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    Hey
    Thanks for all the info. What is up with that tube between the forks it is about 20mm thick, is it just to keep the forks straight while wheel is off?
    Also about the front derailleur there is no mount so it has to be a single.
    I think I will find a front wheel on and a decent crank and just keep as a conversation piece. As what to you think it is worth as is
    I have a FSA triple crank which I will run with just one chain ring

  9. #9
    To be continued Dannihilator's Avatar
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    That's actually the axle to the wheel, 20mm thru axle, you'll need a wheel that will accommodate a 20mm thru axle.

    Quote Originally Posted by New to bikes View Post
    Hey
    Thanks for all the info. What is up with that tube between the forks it is about 20mm thick, is it just to keep the forks straight while wheel is off?
    Also about the front derailleur there is no mount so it has to be a single.
    I think I will find a front wheel on and a decent crank and just keep as a conversation piece. As what to you think it is worth as is
    I have a FSA triple crank which I will run with just one chain ring
    Strike like an eagle and sacrifice the dove.
    Words and Stuff.

  10. #10
    Senior Member New to bikes's Avatar
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    How easy are they to find with disc brake?

  11. #11
    To be continued Dannihilator's Avatar
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    Quote Originally Posted by New to bikes View Post
    How easy are they to find with disc brake?
    Really easy to find.
    Strike like an eagle and sacrifice the dove.
    Words and Stuff.

  12. #12
    Senior Member New to bikes's Avatar
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    Is this frame worth anything? How much is a front wheel that takes an axle like that?
    I am more of a road bike guy thought this is a really cool looking bike that would be fun to bomb around on.
    From the sounds of it this bike is not a nice ridding bike unless you are going downhill
    I thought to would be okay to go out with the kids and if we wanted to go off the paved path it would work well.

  13. #13
    Senior Member New to bikes's Avatar
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    What kind of cost? From what everyone is saying this bike is very out dated.

  14. #14
    Senior Member Mountain Mitch's Avatar
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    Quote Originally Posted by jimc101 View Post
    Much as that's an awesome bike, it's a really bad one to try to turn into anything other than what it was originally designed for, which is full on DH riding. ......

    For the suggestions above for a rigid fork, and triple crank, both are bad ideas...
    +1
    That is an oldschool downhill shredder! Show it some respect.

  15. #15
    Senior Member New to bikes's Avatar
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    Quote Originally Posted by Mountain Mitch View Post
    +1
    That is an oldschool downhill shredder! Show it some respect.
    I have a FSA Alpha Drive triple with bottom bracket that I thought I would run as a single. I have a Bontrager seat post, The front wheel scares me. It does have hydraulic brakes
    You say show it some respect but just wondering is it worth dropping a $300 crank and who knows how much the front wheel is, then ending up with a bike that everyone is saying is pretty out dated. I really like the looks of it and most of my bikes are vintage
    I am building a Cervélo from when they were a start up company so hand built frame with full Ultegra 6700 new or new take offs. I paid $180 for the frame and with the frame I am sitting at $1600
    So for me respecting vintage is not an issue. With the above bike I was offered $450 for the bare frame. This GT STS I am completely stumped by. I do not know if the frame as pictured is worth $50 or $5000

  16. #16
    Senior Member New to bikes's Avatar
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    Quote Originally Posted by Dannihilator View Post
    That's actually the axle to the wheel, 20mm thru axle, you'll need a wheel that will accommodate a 20mm thru axle.
    I actually went downstairs and measured it, it is 20mm axle

  17. #17
    Senior Member Mountain Mitch's Avatar
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    IMHO it is a lot closer to $50 than $5000. My comment was to mean don't try and turn a specialist DH bike into a towner. Maybe you can do it but it's like turning a Jeep into an economy sedan. - why would you?

  18. #18
    Senior Member New to bikes's Avatar
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    Quote Originally Posted by Mountain Mitch View Post
    IMHO it is a lot closer to $50 than $5000. My comment was to mean don't try and turn a specialist DH bike into a towner. Maybe you can do it but it's like turning a Jeep into an economy sedan. - why would you?
    What you say makes sense. I really do not want to part it out seems still to be a nice bike. I think I want to keep it more as a conversation piece and maybe toll around on it . Hence I really do not want to drop a ton of money in it.
    Where would be a good place to find a used wheel for it?

  19. #19
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    1998 GT STS-Lobo DH - New and Used Bike Value
    They still think it is worth a good bit of money. I think you would have a very hard time finding somebody to pay that for one though.

  20. #20
    Senior Member New to bikes's Avatar
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    This is exactly where I am I feel the bike is too nice to part out, I feel after reading all the posts the bike seems kind of useless to me as it will not be a pleasant bike to ride around on as a city mountain bike. I really do not want to drop a pile of money into if i can get a front wheel for under $100 and I will put my FSA Alpha Drive on it using only one chain ring
    Then I will just keep it as more of a conversation piece.
    What would I get for the bike the way it sits?

  21. #21
    Senior Member New to bikes's Avatar
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    So I bought a Mavic EX325 front wheel, got the Hayes master cylinders working and used the FSA Alpha Drive crank with bottom bracket. I ran with a 44T Race Face chain ring.
    So everyone was right a horrid ride on level ground. So to try it and make sure that everything works I put a cheapo department store post in and a cheapo seat tilted all the way forward and to my surprise it was a h*ll of a lot better. Rode it around for a good 40KM on flat and hills
    So I do not think it is going to be a daily rider but it will go out every once in a while
    IMG_0030.jpgIMG_0032.jpg

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