Replace Tiagra 12-30 cassette with? ...more or less teeth

Discussion in 'Components, Accessories and Clothing' started by Stef 1, 16 Apr 2018.

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  1. Stef 1

    Stef 1 Well-Known Member

    Location:
    Cotswolds, UK
    Hi - I have a 2014 Crox de Fer, on which I've covered around 3.5k miles so far.

    Recently, gear change hasn't been as smooth as always... sometimes takes a couple of clicks, or occasionally it feels like there's tension in the chain and then a jump, even more so when going up hill.

    I've checked the chain, which visibly looks okay, but it's getting on for around 1/4 inch longer than it's suppossed to be so must be pretty worn! I'm guessing I should have changed the chain a long time ago and will probably need to change the cassette too.

    My Croix de Fer came with a Tiagra 4600 12-30 which I'm was used to.
    It doesn't appear you can get hold of Shimano Tiagra 12-30 cassettes any more.

    Should I go for Tiagra 4700 11-32 or 12-28?

    I've not considered different gearing before, and don't really know how much of a noticeable difference it will make. I currently use all 10 gears, so do use both extremes on the cassette.

    Right now my fitness isn't what it was so finding myself spinning on the smaller front ring just for bigger hills, which I never used to need to do. However I think this will only be tempory as fittness is noticably getting better again day by day.

    Any advice hugely appreciated ( 'cos I don't know much about this stuff!)

    Thanks
    Stef
     
  2. I like Skol

    I like Skol Hold my beer and watch this......

    Location:
    Ashton-under-Lyne
    If you use all the gears and struggle on some of the hills then the last thing you want to do is restrict your gear range. I would think the 11-32 should be just the job. If you want the 12-30 to match your current cassette do SRAM do an equivalent because they are indistinguishable to the Shimano in practice.
     
    dave r and raleighnut like this.
  3. OP
    OP
    Stef 1

    Stef 1 Well-Known Member

    Location:
    Cotswolds, UK
    Great - thanks. I was pretty much heading towaeds the 11-32, but thought I'd ask incase the general concesus was to man up!
    Having never experimented with different ratios, I really don't know how much different a couple of teeth here or there will feel.

    I guess once fitness has got back to where it once was I can always look at something with fewer teeth on both ends if I felt the need...

    Thanks for your help
     
  4. OP
    OP
    Stef 1

    Stef 1 Well-Known Member

    Location:
    Cotswolds, UK
    Oh, another thought.... for an extra £16 is it worth upgrading Tiagra 10 speed cassette, to Ultrega 10 speed cassette and chain? (I'd keep everything else Tiagra for now).
    I belevie it's a straight forward swap?

    My steel CDF is heavy and I'm no pro, so the weight difference isn't really a huge factor... thinking more along the lines of smoothness and noise?

    (I realise the ultrega is 11-28... so I'd need to man-up a little).

    Thanks
     
  5. vickster

    vickster Legendary Member

    Lighter but may well wear quicker. I'd go for a SRAM or cheaper still Tiagra 11-32 cassette

    http://www.chainreactioncycles.com/shimano-tiagra-hg500-10-speed-road-cassette/rp-prod137768
     
  6. I like Skol

    I like Skol Hold my beer and watch this......

    Location:
    Ashton-under-Lyne
    Definitely not. Tiagra is more than good enough.

    Just had a poke around on chain reaction and it looks like Tiagra is the cheapest 10spd option in 11-32. It is the or i would go for.
     
  7. OP
    OP
    Stef 1

    Stef 1 Well-Known Member

    Location:
    Cotswolds, UK
    Nice & decisive, unlike me.
    Advice taken

    Thanks ;)
     
  8. vickster

    vickster Legendary Member

    As linked in the post above yours ;)
     
    I like Skol likes this.
  9. andrew_s

    andrew_s Guru

    Location:
    Gloucester
    Can I suggest replacing the gear cable?
     
    Stef 1, dave r and gaijintendo like this.
  10. OP
    OP
    Stef 1

    Stef 1 Well-Known Member

    Location:
    Cotswolds, UK
    Yep, you can absolutely suggest it! ;)

    I did consider and nearly added some to the basket when ordering cassette and chain, but then read lots of folk say they don't bother changing cables... they last 10k miles... only bother changing cables when you change your frame etc....

    I have a couple of spare, generic, no-brand, cables purchased a while back when I built a knock-about bike back for my son. Are cables, just cables, will any cheap brand do, or should I really look at decent cable? Are they all the same or does it make a difference?

    Thanks
     
  11. vickster

    vickster Legendary Member

    Jagwire roadbike cable. You'll naturally need gear not brake cable. That said Clarks inners would be ok
     
    Stef 1 likes this.
  12. I like Skol

    I like Skol Hold my beer and watch this......

    Location:
    Ashton-under-Lyne
    Try clean and lubing the existing cables if you haven't already. It is often just the last section where it curves to enter the rear mech that gets a bit gummed up.
     
    dave r likes this.
  13. OP
    OP
    Stef 1

    Stef 1 Well-Known Member

    Location:
    Cotswolds, UK
    okay - thanks. Chain, cassette and tools should arrive today - will pop those on tonight. If there's still an issue will move onto replacing the cables too.

    Thanks for the advice all - top stuff!
     
  14. OP
    OP
    Stef 1

    Stef 1 Well-Known Member

    Location:
    Cotswolds, UK
    Just a quick update, quite a while later!

    New chain and cassette made a good improvement, so much so I thought ‘job done’ and was happy.

    So, six weeks later I’ve also changed my gear cables. I purchased just the inners... basic jagwire ones for less than £3 each. Fitted them yesterday after cleaning out and oilling the outers and then re-indexed again.

    Wow, what a difference. It’s as if I’ve had a groupset upgrade! Much quicker & slicker gear changes. The indexing is spot on - One light click on the shifter = one precise shift. Best cash I’ve spent on my bike so far! I don’t ever remember the shifts being that good :smile:

    For what it’s worth, my bike is 4 years old from new, covered around 6000 miles before changing the cables
     
    Last edited: 28 May 2018
    SpokeyDokey, Pat "5mph" and dave r like this.
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