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Front derailleur for 2004 Specialized Hard Rock

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Front derailleur for 2004 Specialized Hard Rock

Old 07-03-19, 12:29 PM
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stasheffsf
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Front derailleur for 2004 Specialized Hard Rock

Hi, all -

I have a 2004 Specialized Hard Rock on which the front derailleur finally has bitten the dust. any suggestions on where to look for a replacement? What specs do I need to be sure to keep in mind (there are 3 front gears, 7 on rear cassette)? The old derailleur is a Shimano Acera, but that doesn't seem like enough info ...

A few photos available, in case that helps ... (but I'm not allowed to attach, since this is my 1st post)

Thanks!

Steve Stasheff
Rockville, MD
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Old 07-03-19, 05:49 PM
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katsup
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Do you want to upgrade or replace what you currently have?

There should be a model number on the back of the derailleur if you want the same one. Other than knowing it is a 3 speed, you also want to note whether it is top or bottom pull as well as the clamp size. The clamp size is often written on the inside of the band.
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Old 07-03-19, 07:59 PM
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Shimano lists 2 current Acera triple front derailleurs, both are top "swing" 3X9, AFAIK will work on 3X7. One is TS3 the other TS6, I don't know the difference. Shimano, as is common, doesn't provide a lot of specs. One can use the model # from Shimano site & google it...often retailers provide more specs. Just to be sure you might want to measure the chainline & also note # of teeth on chainrings since front derailleurs are designed to work best for a certain range, ie difference between # of teeth on large & small rings.

https://www.sheldonbrown.com/chainline.html


https://bike.shimano.com/en-US/produ...era-m3000.html
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Old 07-05-19, 10:18 AM
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fietsbob
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2 type MTB FD 1 for the compact 42~44t and another now called Trekking, is for a 48t..
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Old 07-05-19, 01:16 PM
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steve, any good bike shop thats been around for a while will know and have a reasonably priced (probably 20 bucks) fd that will work perfectly fine.
They will know what type will be an easy switch for the busted one.
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