105 10 sp vs 11 sp
 

I'm about ready to pull the trigger on a caad 10 105. It looks like I can get a 2014 model at a discount (advertised price $1200). A different bike shop said that all new 2015 models were also 15% off, which puts a 2015 model around $1350. the 2015 goes to 11 sp. I'm trying to pinch pennies everywhere I can but i'm leaning towards the newer one because it seems like there could have been a big shift in the components. Thoughts?

Both are good, but word on the street is the 5800 version (11 speed) is really good. Not just for the extra gear but other factors too (brakes, etc.).

So I would try to bridge that gap if you can.

If you can't, the 5700 (10 speed) version is not too shabby either.

Win-win!

For $150 extra I'd get the 5800 version. Why? <spinal tap>These go to eleven</spinal tap>. That and 5800 is better than 5700.

It's definitely 100 more group. That's just pure mathematics. ;)

Also, you'll find the braking to be a solid 12 placebos more confidence inspiring, and the shifting is apparently 8 or 9 placebos "smoother" and more refined. The finish is about 10 placebos nicer as well, and the ergonomics are a solid 13 placebos in improvement from my limited experience with them.

The additional gear is the least of your worries :D

The brakes are the same on the 2014 and 2015, so more like 120 placebos better. ;)

I have an opinion!

One of my steeds had 5700, purchased new. I sold the 5700 and bought 5800.

No contest: 5800. Well worth it.

I think you really only get that kind of improvement if there's a set of Bold New Graphics, or a different finish of some kind. New cable coatings, that kind of thing would warrant a 100+ placebo change... now you're just being RIDICULOUS about these claims.

Are you a new road cyclists? If so, get the 5700 and spend the extra cash on pedals and shoes. If you already have those things, get the 5800.

fwiw, 5800 isn't just placebos better, but actually noticeably smoother. If you aren't already running 11s, you won't know what your missing, so it won't matter, but it is actually smoother feeling.

I'm going to be buying something likely with 5800 this spring, so I'm just being an ass. My apologies :)

It's one thing to buy existing technology and then have the replacement appear a week later. Well, you just didn't know. And it is not the end of the world. You will enjoy the older stuff for a long time. But when the next generation is right out there, don't go backwards. You can't expect your purchase to be the latest and greatest forever, but it makes no sense to embrace the old in favor of the new. For so small a price difference you might as well start out ahead.

I have 5700 on two bikes (including a 2012 CAAD 10). It works great no complaints. But 5800 is better. I have test road it and read several reviews. Front derailleur shifting is noticeably better, braking is noticeably better, and of course the extra gear. One important thing to factor with the CAAD10 is you are not getting the 105 crankset (you get FSA due to BB30) and you are not getting 105 brakes (you get Tektro) so there goes the upgraded braking. And when I say 5800 is noticeably better than 5700, that takes nothing away from 5700 because it's still great group but it just means I do notice a difference (however minimal it is)

For $150 if it was me, I would just go with latest and greatest otherwise you'll always be wondering

For not too much of a price premium, the 5800 is an absolute no-brainer - better in every way.

cheers

All of the new 11sp Shimano groups are better than the outgoing 10sp groups. Well worth the small premium to get 5800.

+1

5800

Lots of good opinions and right-thinking in this thread! Cool!

I'll add that it may be worthwhile considering that going 11spd opens up wheel and cassette compatibility options which may be nice to have in the future. All 11spd cassettes and derailleurs are cross compatible.

Whether buying that ability makes sense is another question, and I think that @tekhna nailed the number one question: are you already geared up to ride? If not, and you're watching dollars, you'll find there's a lot of other gear beyond the bike that you'll need and want and which are more important than an extra gear, cross-compatibility, or minor improvements in ergonomics and shifting performance over 10spd.

they can't sincerely believe they can sell a '14 at that price when they must know a '15 is being sold with 15% off for only $150 more. they must not really want to unload the '14, or maybe they don't know about the "other" store and should be informed by someone. i think if i were the OP i might just do that. :)

The shop closest to my house has the '14 model. I asked them if there was any real difference between the 5700 and 5800 and they told me to get the 5700. They acted surprised and indignant when I told them the other shop had a new one on sale. I've would rather frequent this shop because it's closer to my house, but to be honest I haven't really liked the guys every time i've talked with them. I really liked the other shop where the '15 is on sale, it's just further from my house. I think i'm going to go with the '15 model though.

I am a new road bike owner. I have borrowed and rented for races and I have done a lot of mountain biking. I could be wrong, normally the new years are a small shift but it seems like this is a large shift in component value.

Yes, this is a large shift as has already been stated. Again, nothing wrong with 5700 105. I have it on two bikes and I'm not going to rush to upgrade anything but if I was buying new and it was a $150 difference as in your case it would be a no brainer. Also buying from a shop where you like and trust people is good. I have bought from a shop full up pretentious shady jerks because I got a good deal but I would never go to them for service because they rip people off and talk down to everyone and even make fun of customers while they're in earshot. LBS support is good to have and if they offer free tune ups, take advantage but it's also valuable to learn to do all that work yourself. I can tune my brakes and drive train in 20 minutes at home instead of dropping it off at LBS and waiting a day or two or more depending on how busy they are

Excellent reasons to go with the '15. Do NOT buy from a shop you do not like

One extra benefit, that everyone seems to overlook, is that with the advent of 11 speed, now all 3 group's drivetrains are compatible with each other once again. During the 10 speed days, you were stuck to some degree. Not any more.

Meaning, you can use any Sram/Shimano/Campy 11 speed shifter with any Sram/Shimano/Sram 11 speed rear wheel.

So, if one day you should get a good deal on a campy 11 speed wheel, or decide to change to Campy 11 speed shifters & rear mech, it will all still work as a mix n' match.

Note: I am not 100% sure about 2015+ Campy shifters / rear mech. They redesigned everything starting there.

Sources:

1) Myself using 2014 Campy Record 11 speed shifters/mech + Sram 11 speed cogset.
2) Leonard Zinn
Drivetrain compatibility hidden in plain sight - VeloNews.com

IMO, this alone is 99% enough reason to go to 11 speed over 10 given the choice, assuming the cost is close.

How come wheelsets come in either Campy 11 speed compatible hub or Shimano/SRAM compatible 11 speed hub?

buy the 2015 model, use local shop to service/buy other stuff...

win-win.

Although either cassette (Campy, Shimano, or SRAM) can be used with either drivetrain, the freehub splines that fit Campy are different than the splines that fit the others. The splines that fit Campy are so robust that even when made from aluminum, the cassettes don't bite into them and mar them. The much less robust splines that fit Shimano and SRAM cassettes tend to be damaged by cassettes that fit them when the splines made from aluminum. It is only since 11-speed that the three brands can be used interchangeably with the different drivetrains. Before that you had to match Campy to Campy and Shimano/SRAM to either of those two. You still get to chose which type freehub to buy depending upon which type of cassette you plan to use.