Another quality superstar product.

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  • Another quality superstar product.
  • how old was the chain?

    Premier Icon geoffj
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    Installed with a rock?

    Premier Icon on and on
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    The chain was new. The whole drive chain was replaced at the same time.

    Premier Icon mikewsmith
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    Premier Icon Del
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    well, i’m no lover of superstar, by any margin, but really – 14T, aluminium, WTF were you thinking to buy it?

    Premier Icon on and on
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    This happened on my 2nd ride. A total of 43 miles.

    I know 7075 alloy isn’t the best material for a sprocket but I expected a little better.
    Back to steel for me 🙂

    Premier Icon on and on
    Subscriber

    Regardles of material, If they sell them surely they should be fit for purpose ?

    wrecker
    Member

    Jeez, they sell some crap don’t they?

    patriotpro
    Member

    Didn’t realise you needed to be a metal expert to buy stuff from superstar… 🙄

    Premier Icon benji
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    Out of interest what is your chain line like is it perfectly straight?

    Chris King, stainless steel, nicely lightened and teeth you won’t need a dentist for.

    Premier Icon sticky
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    Might have to give mine a look over, but I did get 12 months about 2000 miles out the last one. Which I thought was good value.

    Premier Icon on and on
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    The chain line was spot on. I’m not sure what caused it to star to fail. I’d assume one tooth went and allowed slip which took the others out.
    I alos had plenty of chain wrap around the sprocket so that wasn’t the cause.

    Premier Icon Del
    Subscriber

    Didn’t realise you needed to be a metal expert to buy stuff from superstar…

    i’m no expert by any means. i just play safe and don’t buy anything from them. 😉

    Surely it should be left with 8 tenntaclesteeth?

    bigyinn
    Member

    Aluminium
    Sprocket
    Not two words I would want or expect to be seen in relation to singlespeed sprocket quite frankly.
    Apart from anything else I would imagine that it wouldn’t have lasted long in the grit & filth.

    Premier Icon gofasterstripes
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    Well what’s this all about then?

    They’re not for single speed.

    Premier Icon gofasterstripes
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    I know that, but I’m just curious as-to why it works fine on a cassette. It is the size of the sprocket [F*D=const.] or is it the fact a cassette can freewheel.

    My money is that is should work but the Superstar one is just too crap to tek’ it!

    mrblobby
    Member

    benji, you have a lovely back end there!

    29erKeith
    Member

    Loads from 40t are very! different from 14t, SS grunting up a hill

    Premier Icon gofasterstripes
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    I don’t think you’re right – I think it’s to do with the tooth profile and the Alloy choice and not the number of teeth.

    But I could be wrong 🙂

    http://www.emsamakine.com/KPANEL/RTE/resimler/9-_MAK%C4%B0NE_ELEMANLARI_-_ENGLISH.PDF

    If you want to work it out!

    Is it actually 7075? 7075 is one of the highest strength aluminium alloys available, Renthal have been manufacturing road and motocross sprockets from 7075 for donkey’s years so I doubt that they’ve been getting it wrong for so long.

    I suspect that like a lot of Superstar’s stuff it’s cheap Chinese sh!t masquerading as something else.

    Premier Icon igm
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    Or it could be a one off failure of something that was designed and manufactured properly. Trust me they do happen, statistical processes and failure modes being what they are.

    What have Superstar said about replacement or refund? I didn’t spot that bit.

    Premier Icon gofasterstripes
    Subscriber

    Rohloff sprocket after 10,000KM or thereabouts. I didn’t flip it because the seal surface was a bit cruddy.

    EDIT – it’s very tough Stainless Steel

    Premier Icon ononeorange
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    I have a nice horror picture of a sprocket that I could theoretically post up, but I can’t post pics so I won’t!

    (It’s what happens if you don’t touch a s/s sprocket for several years).

    Premier Icon cx_monkey
    Subscriber

    I had one of these:

    http://www.endlessbikes.com/products/kick-ass-cogs/

    it’s aluminium alloy and ss specific. Ti be fair, I had a 17T, but they make them down to 14T. I had no problems with it at all – except it did (obviously) wear quicker than a steel one.

    Currently running a Ti version of this:

    http://www.homebrewedcomponents.com/store.php/products/stainless-and-titanium-2-piece-cogs

    seemed like it was the best balance of weight vs durability. So far the fact that it was $100 USD has been negated by it lasting nearly 4 years already – barely any signs of wear even now.

    FWIW – Homebrewed also makes alloy sprockets.

    Premier Icon Potdog
    Subscriber

    Return it, but they will probably just say its been used for a purpose it wasn’t intended for, just like they did when my brake disc split 😆

    Junkyard
    Member

    yes return it so you can incur some postage costs in exchange for a condescending explanation of why it was your fault

    I wish i was just joking

    gazc
    Member

    if its a superstar cog why does it have fouriers logo on it? is it a different version ie: same factory, like the wah wah/nukeproof/superstar pedals? superstar website pic below. either way thats still poor performance and needs to go back for a replacement/refund/whatever

    What have Superstar said about replacement or refund?

    😆

    7075 is actually a good alloy to make this kind of thing from, certainly better than any 6000 series alloys. I blame poor heat treatment after forging!

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