Cycleops
Legendary Member
- Location
- Accra, Ghana
Don’t even go there
Giant Advanced 1 (standard 105 2x11) vs Advanced 2 (modified to 1x11) vs Advanced 2 (standard Tiagra 2x10)
- Thread starter Sloth
- Start date
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vickster
Legendary Member
Ask the dealer as it’s them who you’d deal with in case of a warranty claim!
bikingdad90
Guru
Depends if the Deore 1x11 is new, if it’s new boxed shimano stuff, then it would be like for like and I imagine less likely to be a problem for than used; dealer will confirm as they have the relationship with the vendor and the insurance company for liability etc.
OP
OP
Sloth
Senior Member
I have asked the dealer, but to be honest he didn’t seem sure.
I’ll contact Giant I think.
I suspect that it may be a bad idea and for any small improvement on hill climbing and simpler shifting (without front mech) I’d be better off avoiding the risk and either going for a bike that comes with a 1x (I.e Trek FX4 Sport) or sticking to the unaltered stock 2x Giant Fastroad Advanced 1 or 2.
I’ll contact Giant I think.
I suspect that it may be a bad idea and for any small improvement on hill climbing and simpler shifting (without front mech) I’d be better off avoiding the risk and either going for a bike that comes with a 1x (I.e Trek FX4 Sport) or sticking to the unaltered stock 2x Giant Fastroad Advanced 1 or 2.
vickster
Legendary Member
What’s the cassette on the 105? If it’s 11-32 or greater, you shouldn’t have an issue on hills assuming no health issues.
It’s the lifetime frame warranty to consider and any authorised Giant dealer should surely know what the terms are regarding replacement parts! Warranty on parts is pretty limited and only on new
It’s the lifetime frame warranty to consider and any authorised Giant dealer should surely know what the terms are regarding replacement parts! Warranty on parts is pretty limited and only on new
Dogtrousers
Kilometre nibbler
The answers to these are all subjective so take this with a pinch of salt.
So the choices are, in gearing terms.
42 plus 11-51.
34/50 plus 11-34
Off we go to https://www.bikecalc.com/
Will a 42/51 (roughly 22") gear be noticeably easier than a 34/34 (roughly 27") gear up a steep hill? Yes. Very noticeably indeed.
What your ideal bottom gear is, is entirely subjective. 34/28 is ok for some 34/34 for others, and yet others differ more. It's down to your fitness, riding style and chosen terrain so no one can say what is best for you. No one ever climbed a hill cursing the fact that they had a spare lower gear in reserve.
Will it spin out going up hill? Maybe but that's not a problem, you just change up a gear if the hill's not too steep. But perhaps that's not the question you were asking.
Or did you mean - will the top end (104" or 42/11) spin out too easily compared with the top gear of the alternative (124" 50/11)?
Well if we take two cadences 90 (say, cruising) and 110 (say "spin out") - these are debatable but I've chosen them so neh.
42/11 you will get 27 mph / 43 kmh at 90 rpm and 33 mph / 53 kmh at 110 rpm
50/11 you will get 32 mph / 52 kmh at 90 rpm and 39 mph / 63 kmh at 110 rpm
Personally 42/11 would be entirely sufficient for me as a top gear because if I'm going 33mph / 53 kmh then I'm freewheeling down a big hill so I don't need to pedal. However I do have 50/11 on my bike and I do use it. (Typically mashing a big gear at a low cadence if that's what I feel like doing). So "spinning out" isn't necessarily the right criterion for a top gear. It's more a question of will you use it? Do I need my 50/11? Nope. Do I use it? Oh yes.
But other people are fitter than me and go a lot faster and ride differently, so it's all subjective.
Another subjective point is the gaps between gears. Some people are real "princess and the pea" types who are unhappy unless the gear is just right. For them a 1x11 would have jumps between gears that are too large. Others aren't so fussy.
Will 105 feel nicer than Tiagra? I don't know the answer to that but 105 does feel very smooth. I love it.
Will the 2x11 105 be easier uphill than the 2x10 Tiagra? No, unless I've got it wrong they both have the same 34/34 bottom gear.
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Grant Fondo
Guru
- Location
- Cheshire
You could also pop 1x11 Deore onto this within budget?
https://totalfitnessbath.co.uk/specialized-sirrus-4-0-2021/
OP
OP
Sloth
Senior Member
Hmmm, good suggestion.
Worth having conversations.
Even better would be the X5.0 (it comes with a Shimano 1x12 SLX set up) but it seems to be nowhere insight right now?
X4.0 is an SRam NX which has pretty poor reviews compared to the Shimano Deore etc.
bikingdad90
Guru
@Grant Fondo got to bork at that price tag.. £1100 for microshift 9 speed!!! Would expect at least full sora. But if it’s a donor bike for a better groupset then it’s all relative.
OP
OP
Sloth
Senior Member
Giant have confirmed that the warranty will not be void providing an authourised dealer carries out the mods.
I have also spoke to Specialised and they may do the mod, but will not retain the original groupset and offset the cost, so that's going to make it too expensive.
Can't be bothered with having to try and sell the original groupset and even risk not being able to do so.
The Sirrus X5 would be the perfect bike but is no longer readily available in the UK, but can be ordered in for around March next year. however it is now £1,999 so even with a 10% discount will not be in my £1,700 (at a push) budget.
I have also spoke to Specialised and they may do the mod, but will not retain the original groupset and offset the cost, so that's going to make it too expensive.
Can't be bothered with having to try and sell the original groupset and even risk not being able to do so.
The Sirrus X5 would be the perfect bike but is no longer readily available in the UK, but can be ordered in for around March next year. however it is now £1,999 so even with a 10% discount will not be in my £1,700 (at a push) budget.
Grant Fondo
Guru
- Location
- Cheshire
Don't worry, the 2023 model is £1700 with microshift
My point being its the same excellent frame as the £2800 (??) Sirrus 6.0 (minus futureshock).That one unfortunately seems to fit @Sloth requirements nicely - ie. 1x12 groupset with 40/50 gearing
https://www.balfesbikes.co.uk/bikes...rus-60-hybrid-bike-2023-in-gloss-black__31892
vickster
Legendary Member
What do you expect the differences to be, bearing in mind you can always change cassettes with the Tiagra or 105 if you need a lower bottom gear for example?
Grant Fondo
Guru
- Location
- Cheshire
.... or go sub-compact 2 x 10 GRX (46-30) chainset on A2 and lose Tiagra chainset?
https://www.probikekit.co.uk/bicycl...Vg-3tCh1GKwK8EAQYAyABEgJe-PD_BwE&gclsrc=aw.ds
