Half links.

Discussion in 'Australia and New Zealand' started by Marx SS, Oct 18, 2005.

  1. Marx SS

    Marx SS New Member

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    The drive chain on the Single spd commuter is finally lived through it's best times.
    I’m running the single cog on a spaced-out cassette freewheel on my stnd MTB with vertical drop-outs, so I use a chain tensioner. Not happy with the DMR chain tensioner I’m using as the spring mechanism which loads the tensioner is actually just a bent piece of fencing wire (or a close cousin to a piece of fencing wire) which has dropped my chain more than once (I feel that gutters & stairs are legitimate avenues of passage). So I really want to lose my DMR tensioner down the back of the shed where my old training wheels are if I can.

    At last Thursday’s dirt crits at Westgate (Melb) there was a dude that was riding a single spd with a chain made of half links. Half link chains has each link exactly the same, & each link connects on the outer at one end & tapers in to connect into the inner on the next link. (I hope this makes sense).
    I herd they’re about $150.
    Anyone got personal exp with fitting them ( I assume they use the pressed in pin set-up) & how they last next to a stnd , say multi-spd chain?
    They look pretty beefy & give the impression they’ll last well right up to when they need replacing. .

    Just as a side note, when I waltz into a LBS & drop a comment about parts from my commuter I always get referred to the lower end, basic or cheap stuff. It’s ironic really as I do more mileage on the commuter than my other 2 bikes in all sort of conditions all yr 'round & only really consider acknowledging maintenance on it when things go wrong,.
    As apart from my dirt going MTB, that gets TLC after every major ride/race (so parts get replaced & it gets serviced well) or my roadbike that does easy road miles & little squeaks & rattles get addressed quick-smart (no one likes to ride next to a noisy road bike).
     
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  2. Koon Yong

    Koon Yong New Member

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    Isn't it more common to use one half-link in a regular chain to get better tension? They seem to be common in the BMX world (1/8 chains) but I've never come across one in Oz.

    Spicer cycles has one for 3/32 chains. Shipping might be more than the cost of the link though.

    Personally, I'd look for another solution to "the perfect chain length/tension on vert drops" method. I used to do this on my MTB convert but I had to pre-stretch the chain 1st to make it fit. After about 2 weeks of riding the chain would be too slack and I'd have to do it all over again. Too much trouble.

    http://www.spicercycles.com/index.cgi?cat=18&sub_cat=half%20link%20chain%20link&prod_id=389&cat_desc=Mountain

    Cheers
    Koon
     
  3. hippy

    hippy New Member

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    $150 for a chain is ridiculous. You don't need a whole chain made from halflings.. I mean half-links. You only need to remove a normal link and fit a halflink. Surely with the amount of SS in Oz they are locally available somewhere?

    You could also try bending the spring in the tensioner to give more tension.

    I used a derailer on the GT for tensioning and I don't actually remember dropping the chain once I'd fitted it. I know it's a bit fugly but so am I so no probs! :p

    hairless hippy
     
  4. Marx SS

    Marx SS New Member

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    Sometimes maybe I think about stuff too much.
    The DMR tensioner has a relitively shallow range of tension due to the type of spring it uses – the bent piece of wire. If it had a cool coil spring that’s found in every friendly neighbourhood rear derailuer then there wouldn’t be a problem as that type of spring can provide a more uniform tension across a far greater range.

    I’m currently running 44/18 & have a lot of slack in the chain I can’t take up by dropping a link.
    I have a 16t cog laying aorund so I’m matching that to a 38t chainwheel to get close to the ratio I’m running right now, see how that goes with a SRAM 8spd chain I found with the 16t cog.
     
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