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What derailleurs will work on older GT Aggressor?

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What derailleurs will work on older GT Aggressor?

Old 05-21-15, 09:30 AM
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DrewsterS
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What derailleurs will work on older GT Aggressor?

I'm a newbie and I just bought a used GT Aggressor 24-speed. I'm not sure what year it is, but I'm guessing around 2006. I need to replace both front and rear derailleurs and I want to buy them online. How do I know what will fit, and what types to buy (long cage, direct mount, etc....)? I'm looking at Shimano Altus or Deore, that range. Can I reuse the hanger currently on the bike?? All help would be appreciated!!

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Old 05-21-15, 12:41 PM
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If the hanger is not damage, you can still use it.

Shimano Altus 7/8 sp rearwill be cheaper than the Shimano Deore. I think the Shimano Deore are also 9 sp so you will have to lock the High setting so it doesn't go over.

With Shimano Altus front derailleur make sure you buy one that works with your existing cable system. Some bike pull from the top while others pull from the bottom. You also have to make sure if it is a clap system, that it will accommodate the size of your tube.

If you buy any part online, make sure you ask and are clear that it will work with your set up so you are not having to return the product and then buy another one.
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Old 05-21-15, 02:26 PM
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DrewsterS
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Thanks Nightvision! What about the Shimano Acera line? All 3 lines are around the same price.
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Old 05-22-15, 01:04 AM
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Would look at Alivio M4000, it's one of the newest of any Shimano MTB groupset currently available, and is a step up from Acera, looks great too
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Old 05-22-15, 12:52 PM
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These models are all in the Recreational mountain bike groupset. Shimano list these from what they consider Best at the top to least. These are all made with less expensive and heavier alloys and will not last as long as Deore or SLX model. If you looking for inexpensive models then those are the ones that will work for you. You can mix and match models if you are trying to save on cost.

Shimano Alivio Rear and Shimano Alivio Front
  • Alivio [M410 and M430] (8 and 9 speed)
  • Acera [M360 and M390] (8 and 9 speed)
  • Altus [M310] (8 speed)
  • Tourney (6, 7, 8 speed)
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Old 05-22-15, 02:40 PM
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Thank you! Very helpful!
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Old 05-22-15, 08:51 PM
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Originally Posted by nightvision View Post
If the hanger is not damage, you can still use it.

Shimano Altus 7/8 sp rearwill be cheaper than the Shimano Deore. I think the Shimano Deore are also 9 sp so you will have to lock the High setting so it doesn't go over.

With Shimano Altus front derailleur make sure you buy one that works with your existing cable system. Some bike pull from the top while others pull from the bottom. You also have to make sure if it is a clap system, that it will accommodate the size of your tube.

If you buy any part online, make sure you ask and are clear that it will work with your set up so you are not having to return the product and then buy another one.
Current Deore is 10 speed, but likely able to still find 9 speed Deore.
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Old 05-22-15, 11:15 PM
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Just make sure the new one specifically says 7/8 speed. I agree the Alivio is nicer than Acera, but Acera works just fine too, and is less expensive.
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