Which bits to keep during upgrade?
huldra
Posts: 8
I'm finally going to change my Tiagra triple 9-speed (52/39/30) for a 105 compact double (50/34) 10-speed - not because I'm not getting on with the triple, ride-wise - I'm just getting incredibly frustrated with how difficult it is to keep it shifting nicely (and yes, feeling like a little project 
). As I want to go to 10-speed I realise I obviously need to change the gear levers, the cassette, the chain rings and the chain itself - but can I keep the front mech and rd? The current cassette is a 25/12, I want to go for a 28/11 so I'll have half a chance getting up the steepest hills. 
). As I want to go to 10-speed I realise I obviously need to change the gear levers, the cassette, the chain rings and the chain itself - but can I keep the front mech and rd? The current cassette is a 25/12, I want to go for a 28/11 so I'll have half a chance getting up the steepest hills. 0
Comments
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Ribble are doing a good deal on 105 this week, so just get everything new!0
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I know - I'm sort of just trying to convince the other half that I'm not just treating myself to toys 'just because'... Am very tempted to just hit the checkout button though (yes - it is already all in my basket).0
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I would say a new front mech & RD would be needed. buy buy buy0
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huldra wrote:I know - I'm sort of just trying to convince the other half that I'm not just treating myself to toys 'just because'... Am very tempted to just hit the checkout button though (yes - it is already all in my basket).
Checkout...0 -
I was thinking I would be a good girl and wait until the weather improves - not put lots of shiny new stuff on the bike whilst it's still utterly grimsville out there - but I s'pose there's no harm in BUYING it now and leave it in the shed until spring... Particularly as I mightn't get such a good deal off of Ribble later on... You can hear me talking myself into this, can't you!0
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And get each bit out one at a time?0
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Goodness no - I'd have a weekend's upgrade-fest and shove it all on in one go!0
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There's no reason a triple should be hard work. Is there something wrong with it?huldra wrote:I'm finally going to change my Tiagra triple 9-speed (52/39/30) for a 105 compact double (50/34) 10-speed - not because I'm not getting on with the triple, ride-wise - I'm just getting incredibly frustrated with how difficult it is to keep it shifting nicely (and yes, feeling like a little project ). As I want to go to 10-speed I realise I obviously need to change the gear levers, the cassette, the chain rings and the chain itself - but can I keep the front mech and rd? The current cassette is a 25/12, I want to go for a 28/11 so I'll have half a chance getting up the steepest hills.
I've been using a 9-speed Tiagra triple for 3 years - it was already about 2 years old when I got it. I re-indexed the rear derailleur once 18 months ago when it drifted a little (I think it got a knock). But the rear derailleur is no different from a double and other than that I've never had any trouble and it always shifts cleanly. I clean and lube it occasionally and never adjust anything.
By all means switch to a compact if maintenance issues are just an excuse (we all do it ) but if it's really just because the triple is causing you problems it would be cheaper to clean, lube and re-index the de-railleurs or get the LBS to do it. If there's anything bent or damaged it can't be too expensive to repair or replace.
If you're really changing just because you want to then I'd say go the whole hog and replace everything. I suspect the cost won't be much different - the sum of the costs for individual parts are usually much higher than buying a full groupset.0 -
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[accidental duplicate]0
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zx6man wrote:
Remove the inner chainring and index the new STI properly ... done ...
My triple chainrings are 30/39/50 ...
Depends how much the OP has to spend ...0 -
Removing the inner chainring definitely not an option - I need the help up the steepest hills! :oops: Don't have to buy any tools - got all of that already. I looked at buying the groupset, but as I don't need everything (put new bottom bracket on last year) and it won't let me choose exactly what I want, only ALMOST exactly - it's actually £2 cheaper to buy the individual bits. The frame is a 50' audax Ribble.
Shiny bits - mmmmm (said in Homer Simpson-voice) 0 -
is it the same BB for Tiagra to 105 ?0
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Yup - I've actually got the Ultegra Hollowtech II bottom bracket, shouldn't be an issue.0
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Might be worth considering a 12-27 cassette. Very few people actually spin out on a 50-12, and those that do might want to then consider taking a break, tucking in and concentrating on a decent line to go faster rather than clicking up 50-11 and slowly mashing.
The 27 will be no real difference to a 28 so the big benefit, as well as not buying a cog you hardly ever 'need', is a nice tight ratio spread with a useful extra cog which could help keep your legs fresh. IME, fresh legs make more difference climbing than a bail out gear.0
