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  1. #1
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    Sr Suntour Mg80 front fork Replacement ?

    I am trying to restore an old GT Aggressor mountain bike mainly for sentimental reason, and i need a new front fork for it, the one that came on it is a SR Suntour MG80, Im looking for a replacement fork that will fit the GT, If someone get can give me some choices on which will fit would be much appreciated thank you.

  2. #2
    Sneaker man
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    what sort of brakes does it have?
    DO you know what year?
    Can we get a picture (either of it, or just a pic of the same bike)

    You will need to know (hopefully things we can tell you if we get some more info):
    Steerer tube diameter
    Threadless or threaded
    Disc, V or canto brake - will tell you what you need in a new fork
    travel - or frame year, if befroe 2000, then liekly <80mm after 2000 maybe 80-100mm
    All the gear and no idea.

  3. #3
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    I added some pictures i hope they help, i believe its a 1999
    Attached Thumbnails Attached Thumbnails Sr Suntour Mg80 front fork Replacement ?-img_20151128_223458767.jpg  

    Sr Suntour Mg80 front fork Replacement ?-img_20151128_223539364.jpg  

    Sr Suntour Mg80 front fork Replacement ?-img_20151128_223549945.jpg  

    Sr Suntour Mg80 front fork Replacement ?-img_20151128_223607393.jpg  


  4. #4
    Sneaker man
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    OK so you will want something with around 80mm of travel and v-brake studs... something not made much of these days. About the only ..."decent"... fork still made is the Rockshox XC 28 TK.
    You could maybe go for a 100mm fork, it will slow down the steering a bit, lift the front and ontder stupid extreme curcumastances rip the head tube off (probably not though).
    Best bet will be to look on ebay for a new old stock (NOS) or good second hand fork. Just make sure it has canti or v-brfake studs.

    I got a NOS manitou R7 for my Xizang with those specs and it works pretty well. Depends on you budget
    All the gear and no idea.

  5. #5
    Sneaker man
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    AH crap, I just saw, you have a threaded headset... that'll throw a spanner in the works. You need a threaded steerer fork - and one that is the correct length (that looks like a long head tube). So 2nd hand is really the only way to go with that.

    Otherwise add on cost of a threadless stem and headset (plus installation).
    All the gear and no idea.

  6. #6
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    I saw a thing on YouTube where the person switched his bike to a threaded one to a threadless would that be something I could do? How would I tell if mine is a 1 1\8 steerfork?

  7. #7
    Sneaker man
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    yes, you can, you will need a threadless fork (you buying a new one anyway so no prob), a threadless headset and a threadless stem. Plus the ability to remove and then press fit the new headset in the frame.

    Being a 99 (and a GT), it'd be 99% likely to be 1-1/8however saying that, being 1999 I'd have been 99.9% expecting a threadless setup (they were introduce in the early 90's, common by '94).
    All the gear and no idea.

  8. #8
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    I might give it a try switching to a threadless one, if I can do it, what type of threadless fork should I look into getting that will fit my bike ?

  9. #9
    Sneaker man
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    see post #4...it all depends on your budget and what you can find.

    also if foing yourself, remember you'll need a headset press tool and remover. You can buy or make yourself, youtube it for DIY, but its a pain, I leave that to other people, that I can never get the star-nut in either.
    All the gear and no idea.

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