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Ultegra 6800 vs 105 5800 crankset

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Ultegra 6800 vs 105 5800 crankset

Old 09-04-16, 12:28 PM
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Ultegra 6800 vs 105 5800 crankset

Hello all,

Hate to start another thread about cranksets, but because it is another dicussion entirely (last one, I promise):

I am doubting between the Shimano Ultegra 6800 or Shimano 105 5800 crankset

- Shimano 105 5800 crankset weighs 727g without bottom bracket, can be found for $79 on Ribble right now.
- Shimano Ultegra 6800 crankset weighs 680g without bottom bracket, $148 on Wiggle right now.

So the Ultegra is 47g lighter. Both are very similar design. Not really that big of a difference, but still. What would you buy?

I am not so concerned about the weight, more about durability etc. Do Ultegra components really last longer?

Also, if I ever decide to sell the bike, being able to say that it has Ultegra on it "looks" a lot better, than saying it has 105. This is my main concern. Will the Ultegra components increase the value of the bike (a little bit)?

Thanks!
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Old 09-04-16, 12:36 PM
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Think of it as getting a 70$ discount on your next purchase of crank power meter
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Old 09-04-16, 12:40 PM
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Ultegra will always hold more value than 105. But in 5 years now will it add $69 value in resale? Probably not.

Does it work any better? Not that I could tell. I have a 6800 crankset, but never noticed any difference from any of the cranks I've ever owned. Buy it if you think the difference in appearance is worth it to you, but don't if you are expecting any notable performance or resale difference. I bought mine to replace an Oval crankset + Praxis rings just because I like how it looks and wanted a full 6800 groupset.
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Old 09-04-16, 12:48 PM
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Less than two ounces heavier, almost twice as expensive ... $35 per ounce?

I'd go 105 unless you are either way overloaded with cash or really want the Ultegra just to have it. Functionally there will be no difference whatsoever.
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Old 09-04-16, 01:56 PM
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The finishes are very different. Ultegra is gray, 105 is black or silver. Buy whichever matches the rest of your components.
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Old 09-04-16, 03:55 PM
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What [MENTION=90165]shelbyfv[/MENTION] said. Or if you want 46/36 rings, get the Ultegra. Shimano 4 arm big ring selection still sucks.
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Old 09-04-16, 06:30 PM
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Originally Posted by Maelochs
.....

I'd go 105 unless you are either way overloaded with cash or really want the Ultegra just to have it. Functionally there will be no difference whatsoever.
Spot on... 'Cept for way overloaded with cash = DuraAce. Just mildly overloaded with cash, I default to Ultegra.
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Old 09-04-16, 06:33 PM
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Also depends on what the rest of the group set is and how much you want it to match with the rest.
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Old 09-04-16, 06:38 PM
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Originally Posted by Dean V
Also depends on what the rest of the group set is and how much you want it to match with the rest.
Agree...
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Old 09-04-16, 06:42 PM
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Originally Posted by Maelochs
Less than two ounces heavier, almost twice as expensive ... $35 per ounce?

I'd go 105 unless you are either way overloaded with cash or really want the Ultegra just to have it. Functionally there will be no difference whatsoever.
Overloaded with cash? Assuming he keeps the more expensive crank for five years, the difference equates to about the same as a few big macs per year.
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Old 09-20-16, 11:53 PM
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I've got both. Buy whichever matches your other components because they function the same aside from weight. Got 1000's of miles on both and longevity is excellent between them.
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Old 09-21-16, 02:10 AM
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Durability hardly improves past the 105 mark for most components.
Often it's almost the same starting from Sora level.

Crankset- durable ones are with steel chainrings. That is Claris class, below Sora.

It comes down to: 70$ less in your wallet, or 50 grams more on your bike.
Also, styling if you are bothered with it - it differs slightly.

Last edited by Bike Gremlin; 09-21-16 at 07:16 AM.
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Old 09-21-16, 05:37 AM
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Originally Posted by shelbyfv
The finishes are very different. Ultegra is gray, 105 is black or silver. Buy whichever matches the rest of your components.
Yep - functionally they will be identical, or darn close to it.
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Old 09-21-16, 06:16 AM
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I always go 105 vs Ultegra. Dura ace is where the difference is. 105 vs Ultegra, not quite.
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Old 09-21-16, 08:14 AM
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Originally Posted by shelbyfv
The finishes are very different. Ultegra is gray, 105 is black or silver. Buy whichever matches the rest of your components.
This
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Old 09-21-16, 09:35 AM
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Originally Posted by shelbyfv
The finishes are very different. Ultegra is gray, 105 is black or silver. Buy whichever matches the rest of your components.
Yep. On the new bike I just built, had I not already owned an 6800 group I would have gone with 105 because it matches my black frame better. The weight penalty will never be a factor for me because it's too small on an already light carbon frame. The replacement cost between 6800 and 105 components can be sobering for a guy who doesn't have lots of cash to throw at their bike.

As far as resale, I think it sounds better to people if they hear "Ultegra" in the description. The quality of that group speaks for itself. It's more of a feather in your cap if you resale the bike.
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Old 09-21-16, 11:37 AM
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I'm going Ultegra 6800 crankset.
2 reasons
ultegra large ring is 2 piece with a 'FLAT' inner side, will make for less grime buildup , less frequent need for and easier cleaning, when done. 105-5800 has a nice large ring, 1-piece with a 'fluted' construction, open on back. Flutings will catch a bunch of grime and will require toothbrush application and possibly removal of ring to clean fully = PITA!
ultegra arms are slightly rounded and smoothed as opposed to the squared-off 105 arms - less susceptible to inadvertent strikes and damage. I sometimes will have my ankle strike the arm, also means less chance of skinning the ankle.
worth the extra $50-ish for me... besides the better finish and tolerances...
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Old 09-21-16, 11:40 AM
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Originally Posted by cyclezen
I'm going Ultegra 6800 crankset.
2 reasons
ultegra large ring is 2 piece with a 'FLAT' inner side, will make for less grime buildup , less frequent need for and easier cleaning, when done. 105-5800 has a nice large ring, 1-piece with a 'fluted' construction, open on back. Flutings will catch a bunch of grime and will require toothbrush application and possibly removal of ring to clean fully = PITA!
ultegra arms are slightly rounded and smoothed as opposed to the squared-off 105 arms - less susceptible to inadvertent strikes and damage. I sometimes will have my ankle strike the arm, also means less chance of skinning the ankle.
worth the extra $50-ish for me... besides the better finish and tolerances...
its actually not hard to clean, just spray with a bit of degreaser and hit with a hose
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Old 09-21-16, 01:53 PM
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Originally Posted by cyclezen
I'm going Ultegra 6800 crankset.
2 reasons
ultegra large ring is 2 piece with a 'FLAT' inner side, will make for less grime buildup , less frequent need for and easier cleaning, when done. 105-5800 has a nice large ring, 1-piece with a 'fluted' construction, open on back. Flutings will catch a bunch of grime and will require toothbrush application and possibly removal of ring to clean fully = PITA!
ultegra arms are slightly rounded and smoothed as opposed to the squared-off 105 arms - less susceptible to inadvertent strikes and damage. I sometimes will have my ankle strike the arm, also means less chance of skinning the ankle.
worth the extra $50-ish for me... besides the better finish and tolerances...
It's probably just me but none of those reasons would even be in consideration on my decision to purchase one or the other. I do own a set both and I don't see either scenario being a problem.
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Old 09-21-16, 08:23 PM
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Originally Posted by Jiggle
Or if you want 46/36 rings, get the Ultegra. Shimano 4 arm big ring selection still sucks.
I regret my 105 5800 group purchase for exactly this reason, and this reason only. I'd kill, or at least maim, for a matching 46T (or 48T) ring for my crank.
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