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Shimano Sora vs 105

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Shimano Sora vs 105

Old 04-28-18, 11:43 PM
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uriah2405
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Shimano Sora vs 105

So Iím getting a new road bike soon because I bought a CCM presto when I was broke and it was cheap. Its wearing down as expected and Iím wondering what grouspet I would find best value at when I look for a bike.

I know Iím only asking about the groupset so lets say theres a bike with sora for $575 and a 105 for $900 assuming the frame, rims etc is the same in both bikes, which would be better? CCM bike parts are so cheap so would a sora groupset on a road bike feel incredible to me? Or is the 105 that much more worth it for someone like me. I ride multiple days a week alone and with friends.

Thanks in advance everyone
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Old 04-29-18, 03:46 AM
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exmechanic89
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Originally Posted by uriah2405 View Post
So Iím getting a new road bike soon because I bought a CCM presto when I was broke and it was cheap. Its wearing down as expected and Iím wondering what grouspet I would find best value at when I look for a bike.

I know Iím only asking about the groupset so lets say theres a bike with sora for $575 and a 105 for $900 assuming the frame, rims etc is the same in both bikes, which would be better? CCM bike parts are so cheap so would a sora groupset on a road bike feel incredible to me? Or is the 105 that much more worth it for someone like me. I ride multiple days a week alone and with friends.

Thanks in advance everyone
At that much of a price difference I'd buy the Sora bike.
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Old 04-29-18, 05:05 AM
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No way

Originally Posted by exmechanic89 View Post
At that much of a price difference I'd buy the Sora bike.
The 5800 Groupset is pounds lighter the Sora groupset period it's also stiff and generally better in all regards. The only problem is there a few bikes contain the entire 5800 groupset
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Old 04-29-18, 05:19 AM
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On my road bike I have a mix of Sora, 105, and Ultegra components. I haven't found significant differences in performance from any of them, other than the gear limitations of the Sora shifters. They all work fine. Although I don't race. If money is a factor, go with the Sora.
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Old 04-29-18, 05:22 AM
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Originally Posted by raria View Post
The 5800 Groupset is pounds lighter the Sora groupset period it's also stiff and generally better in all regards. The only problem is there a few bikes contain the entire 5800 groupset
I would be surprised if Sora weighed even a half pound more and if anyone could tell any difference between the two except for the one cog. And most people wouldn't even notice that. Do you actually know the weight of each group?
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Old 04-29-18, 06:18 AM
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Going from your CCM to a bike with Sora will be a HUGE difference. Is the frame the same frame on the 105 as the Sora?
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Old 04-29-18, 07:16 AM
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Isn't the answer Tiagra?
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Old 04-29-18, 08:47 AM
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Originally Posted by uriah2405 View Post
So Iím getting a new road bike soon because I bought a CCM presto when I was broke and it was cheap. Its wearing down as expected and Iím wondering what grouspet I would find best value at when I look for a bike.

I know Iím only asking about the groupset so lets say theres a bike with sora for $575 and a 105 for $900 assuming the frame, rims etc is the same in both bikes, which would be better? CCM bike parts are so cheap so would a sora groupset on a road bike feel incredible to me? Or is the 105 that much more worth it for someone like me. I ride multiple days a week alone and with friends.

Thanks in advance everyone
105 is better than Sora.
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Old 04-29-18, 09:12 AM
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Originally Posted by uriah2405 View Post
I know Iím only asking about the groupset so lets say theres a bike with sora for $575 and a 105 for $900 assuming the frame, rims etc is the same in both bikes


Is this question hypothetical or do you have two real bikes to compare?

105 is the gold standard in bike components. I don't think the comparison between 105 and the higher groupsets translates lower down in the line.
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Old 04-29-18, 09:27 AM
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You may be willing to buy the lower cost bike with Sora , but find the 105 one too expensive . it all works adequately..

Its all about offering a bike at a price point the buyer is able to pay.
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Old 04-29-18, 09:46 AM
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I am more of an endurance biker, not a racer.
I moved from Sora full group set to 105 full group set beginning of this year.
Sora was compact 50/34T with 12-30 9sp cassette. My 105 built on an old steel frame is 50/34 with 11-32 11sp cassette.
The shifting and everything is much smoothier and crisp on 105 as expected since 105 is 2 level up.

One big difference I do noticed is that the rolling resistance is way improved on my new bike.
I got a much better tires - Conti GP4SII 700c 25 - compared with some cheaper tires that came along with the Tommaso Tiempo - Kenda 700c 23 tires.
I don't see any remarks on the wheel hubs for the Tommaso though... I got 105 hubs on new bike.

if you are not a racer both group set work fine - shifts, brakes etc - with minimal difference in 'how fast you want to go from A to B'.
investing in a good tire set seems to provide the most bang for the buck in my experience.
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Old 04-29-18, 10:07 AM
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That much of a price difference, get the Sora group, 105 5800 is pretty awful anyway. Spend more on really good tires and you'll be better off than a "nicer" groupset.

Pounds heavier!

Most of the engineering that goes into higher level groupsets is figuring out how to get customers personally attached to the product, attaching significance to small incremental changes in weight and positioning in professional racing for maximum return on sponsorship dollar.
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Old 04-29-18, 11:46 AM
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Originally Posted by Lazyass View Post
I would be surprised if Sora weighed even a half pound more and if anyone could tell any difference between the two except for the one cog. And most people wouldn't even notice that.
Seriously! I thought the same thing - 'pounds more', right.
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Old 04-29-18, 12:10 PM
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Originally Posted by exmechanic89 View Post
Seriously! I thought the same thing - 'pounds more', right.
trust me its heavier, every gram adds up
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Old 04-29-18, 12:14 PM
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Originally Posted by Karman321 View Post
trust me its heavier, every gram adds up
I didnt say it wasnt heavier, but it's not by much. Certainly not 'pounds'. And ťvery gram adds up', huh? Go ahead and explain that to me if you would..
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Old 04-29-18, 12:24 PM
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Cheap grams are always heavier than expensive grams.

duh
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Old 04-29-18, 11:19 PM
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Colombo357- 105 is the gold standard in bike components.
Spoonrobot- 105 5800 is pretty awful anyway.

love this place. In just 11 responses, the OP can get an opinion that something is both the gold standard and also pretty awful.
good stuff!
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Old 04-30-18, 12:42 AM
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For the record, including BB and chain, 105 is approximately 350 grams (0.75 pounds) lighter than Tiagra. I don't know where that puts Sora, but I'd imagine it doesn't double the difference.

I have heard, though I have no personal experience, that the biggest benefit of going to 105 from a lower end shimano set is in the brake performance.
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Old 04-30-18, 07:51 AM
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Originally Posted by exmechanic89 View Post
I didnt say it wasnt heavier, but it's not by much. Certainly not 'pounds'. And ťvery gram adds up', huh? Go ahead and explain that to me if you would..
um 1 gram is 1 gram, 5+5=10.... 390+10=400 .... 400+300=700 etc... I built three bikes one has ultegra with light wheels itís at 13.5 pounds. The other two have tiagra and are at around 18 pounds.. thereís no magic to it. Every gram adds up and equates to a heavier bike?
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Old 04-30-18, 08:48 AM
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From what I understand, 105 is as good from a performance perspective as any mechanical group set. The main difference between it and higher end sets is weight. I'd go with that as you'll never really need/want to upgrade.
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Old 04-30-18, 08:52 AM
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Originally Posted by Karman321 View Post

um 1 gram is 1 gram, 5+5=10.... 390+10=400 .... 400+300=700 etc... I built three bikes one has ultegra with light wheels itís at 13.5 pounds. The other two have tiagra and are at around 18 pounds.. thereís no magic to it. Every gram adds up and equates to a heavier bike?
The difference between Ultegra R8000 and the new Tiagra is 368g. About 3/4lb. Most of that is in the cranks. If I included the cassettes the total difference would be about a pound.

Shifters
Ultegra R8000 438g
Tiagra 4700 493g

Caliper brakes
Ultegra 360g
Tiagra 360g

Rear Derrailluer
Ultegra 200g
Tiagra 277g (long cage)

Front derrailluer
Ultegra 106g
Tiagra 106g

Chainset compact
Ultegra 674g
Tiagra 910g
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Old 04-30-18, 09:34 AM
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Originally Posted by Lazyass View Post
The difference between Ultegra R8000 and the new Tiagra is 368g. About 3/4lb. Most of that is in the cranks. If I included the cassettes the total difference would be about a pound.

Shifters
Ultegra R8000 438g
Tiagra 4700 493g

Caliper brakes
Ultegra 360g
Tiagra 360g

Rear Derrailluer
Ultegra 200g
Tiagra 277g (long cage)

Front derrailluer
Ultegra 106g
Tiagra 106g

Chainset compact
Ultegra 674g
Tiagra 910g
you forgot chain, cassette, and cabling/wires... that can account for around 180 ...368+180= 478 ...a pound is 444 gram... thatís 1.2 pounds and 300 grams away from 2 pounds. See this how add up, feel me
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Old 04-30-18, 09:42 AM
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With that being said, weight isnt everything, but is everything when it comes to accelerating acceleration ...
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Old 04-30-18, 09:48 AM
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Originally Posted by Karman321 View Post
trust me its heavier, every gram adds up

No one is arguing that heavier things are heavier.

Originally Posted by Karman321 View Post
um 1 gram is 1 gram, 5+5=10.... 390+10=400 .... 400+300=700 etc... I built three bikes one has ultegra with light wheels it’s at 13.5 pounds. The other two have tiagra and are at around 18 pounds.. there’s no magic to it. Every gram adds up and equates to a heavier bike?

* The OP was talking about a difference in just the groups (everything else kept the same).
* What real world performance difference is the OP going to see with a difference of < 2 pounds?
* Cost is the part of the equation that you conspicuously left out.
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Old 04-30-18, 10:58 AM
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Why are we talking about R8000 vs Tiagra? OP asked about Sora vs 105. And both bikes are reasonably priced with their respective groupsets. All else being equal, I'd probably go with the one with 105. At that price, also, you're looking at very much entry-level frames anyway, with allow fork, seatpost, and heavy wheels. Why are we even talking about weight?
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