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A small question re: fixifying my tricross single

matchbookmatchbook Posts: 23
edited January 2010 in The workshop
...actually a couple of questions.
Rather basic stuff as well so apologies in advance for my ignorance!
Tomorrow I should be receiving:

1 x Miche Primato 1/8" Advanced Track Chainrings Black 48T
1 x Miche Fixed Track Sprocket Lockring
1 x Miche Fixed Track Sprocket 1/8" 18T Track Sprocket

I have had a little look at park tools website and so on, but to no particular avail.
Will the components I bought fit my bike?
Do I just screw the sprocket/lockring on the other side of the hub?
Do I need any specialised tools (chain whip?, lock ring tool?) or anything (I only have allen keys and spanners).
Is it easy to switch the chainring?

Would be grateful for any advice.

Posts

  • laelae Posts: 555
    Yeah should work. It's not hard to do, but you will need a lockring spanner. If you want to take the cog off after a while, then you'll need a chain whip, but not to put it on.

    Your cranks are Sugino Comp right? They have a PCD of 130mm (I think) - is this the same as the Miche chainring? Otherwise it won't fit. Changing the chainring is just a case of unbolting the old one and bolting the new one on.

    You just screw the cog onto the other side of the hub. Pedalling will tighten it up, then you can put on the lockring (a bit of threadlock is a good idea here). You'll need a lockring spanner to tighten up the lockring. Then just pop the wheel on as normal, making sure the chain tension is right. It's a good idea to check that your lockring is tight after a few rides, too.

    You shouldn't need to space the axle as your chainline should be good anyway.
  • schweizschweiz Posts: 1,644
    Miche Primato Advanced chainrings have a BCD (Bolt Circle Diameter) or PCD (Pitch Circle Diameter) of 144mm and according to the Sugino website, the Sugino Comp crank (if that's what you have) is 130mm, so the ring won't fit!
  • redveeredvee Posts: 11,920
    BCD of a tricross chainset is 130mm. It is marked on the undergeared 42t the bike comes with, think I'm running 44/16 free.
    I've added a signature to prove it is still possible.
  • Yep, Sugino Comp. So: wrong BCD; I now see. Knew there'd be something I didn't consider..
    Looks like when riding fixed I'll have to take it pretty easy down hills till I get the right size ring :p.
    Thanks all for advice, most helpful.

    I guess I'll return the Miche chainring in favour of something like the "Surly Stainless Steel Chainring"
    Stainless Rings 5 arm
    Road 130BCD
    [...]
    Ideal for Single ring use, 6-9 speed compatible as well
    Am I right in thinking this would be OK to fit on the Tricross?
  • WooliferkinsWooliferkins Posts: 2,060
    TA do a 130 track chainring which will be a black hloe lighter than stainless steel.
    Neil
    Help I'm Being Oppressed
  • wgwarburtonwgwarburton Posts: 1,863
    TA do a 130 track chainring which will be a black hloe lighter than stainless steel.

    That's true... but it will also last a great deal longer. Might be worth it, especially if the OP's building up a winter hack...

    Cheers,
    W.
  • _Brun__Brun_ Posts: 1,740
    matchbook wrote:
    I guess I'll return the Miche chainring in favour of something like the "Surly Stainless Steel Chainring"
    Stainless Rings 5 arm
    Road 130BCD
    [...]
    Ideal for Single ring use, 6-9 speed compatible as well
    Am I right in thinking this would be OK to fit on the Tricross?
    Doesn't '6-9 speed compatible' mean it's 3/32 rather than 1/8? I know you can run a wider chain on narrower ring/sprockets, but would've thought if buying new it makes sense to get the same width.
  • wgwarburtonwgwarburton Posts: 1,863
    _Brun_ wrote:
    matchbook wrote:
    I guess I'll return the Miche chainring in favour of something like the "Surly Stainless Steel Chainring"
    Stainless Rings 5 arm
    Road 130BCD
    [...]
    Ideal for Single ring use, 6-9 speed compatible as well
    Am I right in thinking this would be OK to fit on the Tricross?
    Doesn't '6-9 speed compatible' mean it's 3/32 rather than 1/8? I know you can run a wider chain on narrower ring/sprockets, but would've thought if buying new it makes sense to get the same width.

    Yes... but from a wear point of view it shouldn't be an issue and I think 1/8" steel rings are hard to find (maybe from a BMX catalogue, but not in 130mm, I think).

    From what I read, the Surly rings are relatively chunky (ie thick!) compared to modern ultra-narrow components, and should have a broad shoulder profile, since they arn't designed for easy shifting.

    Cheers,
    W.
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