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  1. #1
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    Re-building my old GT bike, need a little help (newb)

    So I used to ride when I was younger (12-14) and I rode a 98 (I think) GT jeremy mcgrath showtime (blue,white,gold), may be gay, but at the time, it looked cool to me. Anyways, I've recently got back into street riding, and the bike's a little outdated, so I'd like to upgrade some things to it but wanted some advice from you guys. I'm not too sharp on BMX vocabulary but I'll try my best. Right now, the bike is completely stock, but I've torn it completely down and starting from scratch. The only thing I plan to re-use is the frame, wheels, and possibly the fork. Here's my questions.....

    ~First off, is the frame even worth fooling with? All I know about it it's a chromoly frame, sorry but that's it.

    ~Stock front fork is steel, should I upgrade to a chromoly fork? Any real benefits to chromoly? I want to lighten the bike up for tricks, so chromoly may be the way for me because it's lighter then mild steel?

    My wheels are in good condition, except I found out when I was tearing it down that my rear axle is bent, should I just replace the axle or buy a new hub? Or a new wheel?

    Want to upgrade to a one peice sprocket, what's a good ratio for the street? 44-10?

    Right now, I've bought animal sway bars, I plan to buy a S&M redneck stem, profile 3 peice crank, new pedals, and sprocket set.

    Thanks for all the help in advance, I've tried to search most of this stuff and have a good idea, but I'd like to tips from my stand point. I can take pics of everything if needed.

  2. #2
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    guess nobody even has .02?

  3. #3
    Gotta Catch em all! lanfarm's Avatar
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    The economy has been really bad lately.
    Did you just kick my tire?! I hope you didn't just kick my tire!

    Bass naming contest winner: -=Łem in Pa=-

  4. #4
    Your imaginary friend. fuzzbox's Avatar
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    If the frame is full chromoly then you don't need a new frame unless you want one. It would be best for chromoly forks as well. The parts you plan on getting sound good. As for gearing 40/10 would be really hard to pedal since it is usually 28/10. You can replace the axle or get a new hub, your choice.

    Every passing minute is another chance to turn it all around.

  5. #5
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    Quote Originally Posted by fuzzbox View Post
    If the frame is full chromoly then you don't need a new frame unless you want one. It would be best for chromoly forks as well. The parts you plan on getting sound good. As for gearing 40/10 would be really hard to pedal since it is usually 28/10. You can replace the axle or get a new hub, your choice.
    Thanks for the reply.

    I honestly haven't looked to see what the ratio is, I'll check and get back to you. Is 28/10 a good ratio for street/city riding?

  6. #6
    free mallocs
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    Any ratio around the 2.75 mark is fine (divide the front by the rear to get this number). 44/16, 42/15, 39/14, 36/13, 33/12, 30/11, 28/10, 25/9, 22/8 are all more or less equivalent. The larger options are usually cheaper and may last longer when just riding around, the smaller options generally weigh less and give you more clearance over obstacles.

    Increasing the ratio will make it harder to accelerate and climb hills but increase your top speed; reducing the ratio will do the opposite. 2.75 has been the sweet spot for many years now, and if you ride enough you'll get used to anything anyway, so I'd suggest just pick a gearing that's around 2.75 that suits your preferences for weight/clearance/price, and not worry about the ratio for now. If you're still not feeling the love this time next year, by then you'll at least have a better idea of what you want, and then you can start tweaking.

  7. #7
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    sweet, thanks man, yea top end isn't really necessary for me, just because our city has some pretty big hills, so I coast a lot, then I have to go up some of those big hills, so I don't want to pedal my life away going up the hills.

  8. #8
    Your imaginary friend. fuzzbox's Avatar
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    If you have a lot of big hills you might want to go a tad easier with something like 36/14
    Last edited by fuzzbox; 12-01-08 at 02:56 PM.

    Every passing minute is another chance to turn it all around.

  9. #9
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    This thread is useless without pictures!

  10. #10
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    Your first problem is that you're trying to build up a freestyle bike with a late '90s race frame designed for would-be motocross riders, not actual BMXers...

    edit: Also, the correct phrase is "This thread is worthless without pics."

  11. #11
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    Quote Originally Posted by CMcMahon View Post
    Your first problem is that you're trying to build up a freestyle bike with a late '90s race frame designed for would-be motocross riders, not actual BMXers...

    edit: Also, the correct phrase is "This thread is worthless without pics."
    So your saying the showtime frame is different frame then a standard GT frame?

    I tried to look up info on it online, but I couldn't find any, anyone know a good place to get info?

    Also, I dropped the frame off today for powdercoating so I can't take pics. Flat black

  12. #12
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    If I remember correctly (and maybe I'm mistaking this for another McGrath frame - BMX Museum is blocked at my work), the Showtime was basically a GT Interceptor made to look like a motocross bike. Gimmicky, hideous, and definitely not made to hold up to freestyle riding.

  13. #13
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    This is what mine looks like. Is this the same one your thinking of?

    http://cgi.ebay.com/GT-Signature-Ser...1%7C240%3A1318

  14. #14
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    Basically, except the one I was thinking of had a stupid plastic body built onto it so that it looked like a motocross bike. Regardless, it looks basically like an Interceptor with different seatstays; not good for freestyle.

  15. #15
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    Quote Originally Posted by CMcMahon View Post
    Basically, except the one I was thinking of had a stupid plastic body built onto it so that it looked like a motocross bike. Regardless, it looks basically like an Interceptor with different seatstays; not good for freestyle.
    can you tell me howcome it's bad?

    I've read a few things about interceptor frame's and that was GT's lowend bike, so I may just either buy a new frame and add some of my old stuff (wheels,breaks, fork) and get the rest of the stuff new. Or should I just build a new bike all together?

  16. #16
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    Late '90s race frames aren't exactly the most durable things ever made, even the cromoly ones.

  17. #17
    BMX Veteran live4muzic2's Avatar
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    Talk about bending dropouts.
    Quote Originally Posted by Dependent View Post
    Lol where would it break... it has the bigger axles...

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