Giant Defy 2015 - Skinny seat stays a problem?
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Giant Defy 2015 - Skinny seat stays a problem?
Postby Machoman121 » Sun Aug 24, 2014 10:44 am
I'm toying with the idea of getting a 2nd bike (pls don't tell wifey yet). I'm drooling over the new 2015 Defy. I love the beefy head tube but am a bit concerned about those really very skinny seat stays. They looked fragile - like it could easily break or snap. Any opinions in regards to that? I remember the Giant Anthem's Alu frame (the 29er version) had a bit of reputation of breaking at the top tube-seat tube junction - when u look at that area you can see how it's much thinner/smaller that portion is. The newer Anthem has now more material in that area.
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Cmm » Sun Aug 24, 2014 11:18 am
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Duck! » Sun Aug 24, 2014 11:24 am
The seatstays take the load virtually along the length of the tube, and it all in compression, so there's none of that kind of stress.
Carbon also has very different properties to aluminium; it is vastly more "elastic" (it flexes more & springs back), and does not fatigue at all if stress does not exceeed its elastic limit. You' have to subject it to a pretty massive hit to exceed its yield point. You'll also find the stays are quite flat in vertical profile; this allows them to behave basically like a leaf spring, enhancing the frame's bump absorption.
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Machoman121 » Sun Aug 24, 2014 5:51 pm
Saw the 2015 advance 2 model at LBS today - the one with 105 and non-hydraulic disc brakes. It was a large size. Picked it up and thought - hmmm....just a touch of heft to it. Picked up the 2014 Advanced (small size) and thought - wow this is light!
I think to justify getting the new 2015 Defy over my current Defy - i'll have to stretch for the Di2 and hydraulics - at least i can see there's 2 positives. Of course it would be great to get that integrated seat post too to maximize weight and the vibration absorption but it would probably cost too much.
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Calvin27 » Sun Aug 24, 2014 6:18 pm
Giant will just give you a new frame and then you will have the latest season colours. They are pretty good with warranty.
Cushy dirt bike
Very cushy dirt bike
Bike crushed by car (RIP)
No brakes bike
Ebike
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Duck! » Sun Aug 24, 2014 6:25 pm
Giant claim that there is zero weight gain for a given model between the '14 & '15 models, even with the addition of disc brakes. Frame layups and tube profiles have been (apparently) tuned so there is still strength where it's needed, but less material in areas where some flex is desirable for comfort aspirations, for overall less frame weight. Disc brake-specific wheels have lighter rims, which offsets the slight increase at the hub.Machoman121 wrote:Saw the 2015 advance 2 model at LBS today - the one with 105 and non-hydraulic disc brakes. It was a large size. Picked it up and thought - hmmm....just a touch of heft to it. Picked up the 2014 Advanced (small size) and thought - wow this is light!
That's what they claim, I haven't yet had a chance to put them on the scales & compare properly.
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Mulger bill » Sun Aug 24, 2014 11:03 pm
London Boy 29/12/2011
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Scott_C » Tue Aug 26, 2014 9:34 pm
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby harmonix1234 » Tue Aug 26, 2014 9:41 pm
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Duck! » Tue Aug 26, 2014 11:49 pm
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby bundydave » Tue Sep 02, 2014 6:52 pm
Little disappointed however at the braking and gear cables and the mess at the front of the bike being Tiagra gearset, but as that is only a cosmetic thing and that's my only gripe its not all that bad.
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Cmm » Tue Sep 02, 2014 7:51 pm
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Cmm » Sun Sep 07, 2014 6:37 am
5800 worked nicely (comparing to 9070, 6870, 6800, 9000 ridden this year) its a little clunky and not as smooth as 6800 but was still quite nice to use.
Disc brakes felt really nice did the decent from sassafras to ftg and felt very confident in the brakes modulation and power makes me wonder if hydro would be a worthy upgrade in the future.
All in all (more testing to come) I am extremely happy with the first impressions especially the quality of bike for the price!
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Cmm » Sun Sep 21, 2014 6:25 am
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby armara » Mon Sep 29, 2014 10:40 pm
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby mitchy_ » Tue Sep 30, 2014 12:45 am
How narrow? The new defy I looked at was still pretty tight between the seat stays, so I think you'll struggle!Cmm wrote:I have ordered a set of narrow nobby tyres to see how much clearance the skinny stays and no rim brake allow. Will post pics of how it matches up
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Cmm » Tue Sep 30, 2014 5:06 am
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby mitchy_ » Tue Sep 30, 2014 12:10 pm
i stand corrected!Cmm wrote:Mitchy 30s on and fit with plenty of clearance
ps. found a small TCX to sit on....
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby mitchy_ » Tue Sep 30, 2014 10:37 pm
Small frame was perfect. I definitely need it now.
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Dr_Mutley » Wed Oct 01, 2014 11:43 am
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Machoman121 » Sat Oct 11, 2014 5:07 pm
I still have to dig pretty deep to pay for the SL though.
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Cmm » Sat Oct 11, 2014 7:21 pm
so to the actual questions ISP. I have had a few ISP bikes and really liked them! although it is hard to compare to the current Defy advanced pro as they are designed with slightly differing purposes (the isp bikes i have ridden are tcr and propel) If you dont travel (with the bike in a bag) and your looking at a bike to have for a while (or are of "regular measurements" for your sized frame when looking at resale) then i would go SL with out a doubt!
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Machoman121 » Sun Oct 12, 2014 12:54 am
Can the ISP handle shoes, seat and pedal changes?
I'm now riding with the ISM Adamo Attack - the rails are pretty high on these. What happens if i change to a seat that has a lower height?
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Re: Giant Defy 2015 - Skinny seat stays a problem?
Postby Duck! » Mon Oct 13, 2014 1:02 am
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