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Upgrading from Sora/Tiagra combo to pure Tiagra

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Upgrading from Sora/Tiagra combo to pure Tiagra

Old 02-27-12, 09:56 PM
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FPSDavid
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Upgrading from Sora/Tiagra combo to pure Tiagra

Would it be worth it? 2010 Cannondale CAAD8 6.

Sora
  • Crank
  • Front Derailleur

Tiagra
  • Shifters
  • Rear Derailleur

Cannondale
  • Brakes (with Kool Stop salmon pads)

Would it be worth the couple hundred dollars to replace the Crank (would I need a diff bottom bracket?), Front Derailleur, and Brakes? Or should I just leave it alone, and not worry about the minor differences?


Last edited by FPSDavid; 02-27-12 at 11:17 PM.
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Old 02-27-12, 10:04 PM
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Juan Foote
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You tell us. Do you like the bike enough to spend that kind of money on it?
Will you feel a reward when it is done knowing that you added parts you wanted and did it yourself? (or are you going to pay a shop to do it?)
Would it be more worthwhile to sell the current ride and buy a bike with the parts you want outright?

Generally it is cheaper to buy a bike outfitted with the parts you want already on it. If you look around on the bay and CL, you could probably find the few bits you need fairly cheap.
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Old 02-27-12, 10:07 PM
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I'd say leave it. Upgrading the FD would be the cheapest (I got a 5600 FD for like $20 shipped on ebay), but also won't provide a noticeable performance advantage. save the money and put it toward upgrading the wheels.
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Old 02-27-12, 10:08 PM
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keep the crank and fd. buy apex shifters and rd.
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Old 02-27-12, 10:09 PM
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I will say that I just saw a tiagra triple crankset (I think the seller said it had ~500 miles on it) go for $25 on ebay. Almost picked it up myself, but I decided that it wasn't enough of an improvement over the RSX crank that I'm going to put on there to be worth having to hunt down a new bb spindle. Deals are out there if you really want to make the move.
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Old 02-27-12, 10:09 PM
  #6  
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I have a caad8 6 and and can at least speak to the crank swap. I purchased a Tiagra triple for my commuter project at a good price and decided to put the Tiagra on the caad and use the Sora crank for my commuter.

In my opinion after comparing the two you won't notice the difference.

If you do make the switch you will not need a new bottom bracket.

Also, I think those cannondale brand brakes are completely adequate...you're really only gaining some bling factor, if that.
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Old 02-27-12, 10:13 PM
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Yeah, ideally in the future (year or two) I'll probably sell the whole bike and get something with at least 105 on it, but right now that's not really an option I can afford.
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Old 02-27-12, 10:15 PM
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As himespau mentioned you may be better off spending the money on a new set of wheels. I bought a set of Neuvation M28 for under $200 on sale.

It didn't make me any better but the bling factor and placebo effect is real strong
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Old 02-27-12, 10:46 PM
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Regarding the crankset, they use the same bottom bracket. The most significant difference between Tiagra and Sora is that the Tiagra's inner ring is aluminum, not steel, and therefore lighter. You can pick up an aluminum inner ring fairly affordably: https://aebike.com/product/105-5750-3...r5741-qc30.htm

For the FD, I believe the front half of the clamp is steel on Sora, aluminum on Tiagra... not much of an upgrade.

If you have upgrade-itis, like it was mentioned already, wheels/tires are a good target. Also consider a GPS if you'd like to start uploading rides to Strava and comparing your performance to your buddies on climbs, etc.
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Old 02-27-12, 10:51 PM
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Originally Posted by FPSDavid View Post
(with Kool Stop salmon pads)
You have already made the most sensible upgrade to that bike. Save your money.

And level your saddle.
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Old 02-27-12, 11:19 PM
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Originally Posted by mechBgon View Post
Regarding the crankset, they use the same bottom bracket. The most significant difference between Tiagra and Sora is that the Tiagra's inner ring is aluminum, not steel, and therefore lighter. You can pick up an aluminum inner ring fairly affordably: https://aebike.com/product/105-5750-3...r5741-qc30.htm

For the FD, I believe the front half of the clamp is steel on Sora, aluminum on Tiagra... not much of an upgrade.

If you have upgrade-itis, like it was mentioned already, wheels/tires are a good target. Also consider a GPS if you'd like to start uploading rides to Strava and comparing your performance to your buddies on climbs, etc.
Yeah, I use Cyclemeter on my iPhone and just signed up for Strava (never heard of it until today, used to just export the .GPX for MapMyRide).

Originally Posted by canam73 View Post
You have already made the most sensible upgrade to that bike. Save your money.

And level your saddle.
More recent pic updated! Just changed its angle yesterday and haven't ridden yet, may be up too high? We'll see!
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Old 02-28-12, 12:23 AM
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Originally Posted by FPSDavid View Post
Would it be worth it? 2010 Cannondale CAAD8 6.

Sora
  • Crank
  • Front Derailleur

Tiagra
  • Shifters
  • Rear Derailleur

Cannondale
  • Brakes (with Kool Stop salmon pads)

Would it be worth the couple hundred dollars to replace the Crank (would I need a diff bottom bracket?), Front Derailleur, and Brakes? Or should I just leave it alone, and not worry about the minor differences?
Not worth it to make such a small jump in groups.

If you were going to go to 105/Ultegra (which can be had for very reasonable prices), then absolutely.
That's a nice looking CAAD. If you were going to keep it for a long time, it might be worth it to get
yourself a 105 group with you can find for $400. as "take-offs" from new bikes. But as is, that bike is fine.
I went from Sora/Tiagra to Dura-Ace. Is there a difference? Yes. But, I pieced together my group for $800.
Still, I wasn't unhappy with the Sora/Tiagra bits. There were fine for what I needed at the time.
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Old 02-28-12, 12:30 AM
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Originally Posted by 2ndGen View Post
Not worth it to make such a small jump in groups.

If you were going to go to 105/Ultegra (which can be had for very reasonable prices), then absolutely.
That's a nice looking CAAD. If you were going to keep it for a long time, it might be worth it to get
yourself a 105 group with you can find for $400. as "take-offs" from new bikes. But as is, that bike is fine.
I went from Sora/Tiagra to Dura-Ace. Is there a difference? Yes. But, I pieced together my group for $800.
Still, I wasn't unhappy with the Sora/Tiagra bits. There were fine for what I needed at the time.
Where can you find a full 105 groupset for $400? I've seen it for ~$850...which at that price-point it seems like a better idea to save up for a full 105 bike instead of spending almost the full cost of my current bike on a new groupset.
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Old 02-28-12, 12:53 AM
  #14  
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Originally Posted by FPSDavid View Post
Where can you find a full 105 groupset for $400? I've seen it for ~$850...which at that price-point it seems like a better idea to save up for a full 105 bike instead of spending almost the full cost of my current bike on a new groupset.
Just gotta keep an eye on eBay and check your local Craigslist too.
You can get a mini-group or sometimes, a whole group.
I picked up brand new Dura-Ace 7800 Shifers for $135. on CL.

https://www.ebay.com/itm/Shimano-105-...item20c31c8b5a
(minus crank/brakes)

I'd add a superior Ultegra SL cransket for $150 to that group + a superior set of Planet-X Brakes for $125.
You'd save a good 1/2 lb and it'll be just over a very cheap full 105 group (which is about $600).

Full 105 Group: $610
https://www.ebay.com/itm/2011-New-Shi...ht_3523wt_1090


Last edited by 2ndGen; 02-28-12 at 01:01 AM.
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Old 02-28-12, 01:09 AM
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Originally Posted by 2ndGen View Post
Just gotta keep an eye on eBay and check your local Craigslist too.
You can get a mini-group or sometimes, a whole group.
I picked up brand new Dura-Ace 7800 Shifers for $135. on CL.

https://www.ebay.com/itm/Shimano-105-...item20c31c8b5a
(minus crank/brakes)

I'd add a superior Ultegra SL cransket for $150 to that group + a superior set of Planet-X Brakes for $125.
You'd save a good 1/2 lb and it'll be just over a very cheap full 105 group (which is about $600).

Full 105 Group: $610
https://www.ebay.com/itm/2011-New-Shi...ht_3523wt_1090

Interesting. What makes the Ultegra SL crankset and Planet-X brakes better than the 105 stuff, vs. the extra cost over the 105 parts?
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Old 02-28-12, 01:19 AM
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Ultegra SL has forged rings, aluminum chainring bolts and a thinner axle wall, compared to 105.

I got an Ultegra 6700 crankset off Ebay for $151 shipped, they're even nicer (although if you want the compact 6750, they seem to go for a little more). Try a few auctions, you might win one cheap. Personally I like the 39-53 better, since the ring-to-ring jump isn't as huge as the 34-50, and if you combine that with an 11-28 on a light, stiff road-racer, that's not a bad setup... if you train, anyway

Any of those (105, Ultegra SL, Ultegra 67xx) will plug right into your existing bottom bracket, by the way.
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Old 02-28-12, 01:21 AM
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Originally Posted by FPSDavid View Post
Interesting. What makes the Ultegra SL crankset and Planet-X brakes better than the 105 stuff, vs. the extra cost over the 105 parts?
The Ultegra SL is actually one of the stiffest cranksets you can buy for the money
(it's even stiffer than a Dura-Ace 7800). It's about 788g (which is respectable) and
it's gorgeous (subjectively speaking of course). It shifts super smoothly too.
The Planet-X CNC Ultralight Brakes are ridonkulously light (about 205g VS 352g for 105)
and the perform very well. And, like the Ultegra SL crankset, they are a nice aesthetic improvement.
Also, you can get them in colors. You can get them in Red or in Black (which has red bits in it).
Perfect match for you bike.









Originally Posted by mechBgon View Post
Ultegra SL has forged rings, aluminum chainring bolts and a thinner axle wall, compared to 105.

I got an Ultegra 6700 crankset off Ebay for $151 shipped, they're even nicer (although if you want the compact 6750, they seem to go for a little more). Try a few auctions, you might win one cheap. Personally I like the 39-53 better, since the ring-to-ring jump isn't as huge as the 34-50, and if you combine that with an 11-28 on a light, stiff road-racer, that's not a bad setup... if you train, anyway

Any of those (105, Ultegra SL, Ultegra 67xx) will plug right into your existing bottom bracket, by the way.
Great score on that 6700 crank.

Last edited by 2ndGen; 02-28-12 at 01:29 AM.
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Old 02-28-12, 02:28 AM
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I sure do think 105 black would look slick on my bike!
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Old 02-28-12, 03:19 AM
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Save your $ for a better bike. Ride the heck out of your existing bike and improve the engine :-)
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Old 02-28-12, 05:16 AM
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Well I guess it's alright if you really want it, but Tiagra and Sora won't make much difference except shifters. While you would find Tiagra 4500 groupset cheap right now (because Tiagra got a model change and most bikes of 2011 and onwards are New Tiagra 4600 which is 10 speed), I am not sure if it's really worth the price versus performance.

I would suggest jumping to 105 and up or buying a whole new bike. 105 and Tiagra makes a lot of difference both in weight and performance. Because most groupset had an update about an year ago and basically what was before the Ultegra became 105 of now. I have New Tiagra Bike (although with 105 Rear Derailleur) and I tried the new 105 5700 series (the guy in this store let me touch it) and I think there are a lot of differences. 105 is worth the price.

After trying 105 5700 series, I felt that I would want to upgrade my Tiagra 4600 series bike into 105 5700. Since my bike is Cantilever (it's CX bike), all I need to change is Crank (which I will be changing it to Shimano Cyclocross Cranks), FD, and shifters (like I said, I already have 105 rear derailleur). That's not much. If I do well, I'll get it under $200. Probably Tiagra 4600 makes HUGE HUGE noise when changing gear from big to small, but 105 goes a lot smoother and without much noise. Not to mention 105 shifters has shifter cables coming out with the brake cables so you can put any handlebar bag you want.
I wanted to make this bike for Commutting and Touring.

Last edited by IFLUX23; 02-28-12 at 05:20 AM.
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Old 02-28-12, 05:52 AM
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i'll echo what other people have said.. you're probably not going to notice a difference (other than your bank account shrinking a bit) just upgrading the crank and FD. i think the biggest difference you'd see between Sora and Tiagra would be the shifters, and you already have Tiagra shifters and RD so i think "upgrading" the crank to Tiagra might lead to disappointment if you're expecting a huge difference. as for the brakes, your current calipers with the Kool Stop Salmons will probably perform just as well as anything you might upgrade to (within a reasonable price range of course). i did a brake upgrade on my first bike from Tektro to 105 and felt no difference, already had the Salmon pads on the Tektro calipers so i literally didn't feel a difference at all between the two. i'd save your money and work towards upgrading to a full 105 group (or 105/Ultegra mix), or just save it for a new bike in the future.
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Old 02-28-12, 06:30 AM
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You really can't go wrong with Tiagra components. For a solid, reliable, entry level group set, it's hard to beat.

On the other hand, if you are going to spend mony on upgrades, my recommendation is not to take baby steps. If you're going to upgrade, UPGRADE. Riding a Sora/Tiagra, or just a Tiagra set if fine, but as was said above, a real noticable upgrade would be to 105, Rival, Force, Ultegra, etc.....

I rode my Tiagra group set for 2 1/2 years. Put thousands of miles on it. It performed great!! I've now upgraded to a new 2012 Rival group set. I am, however, keeping the Tiagra set for a winter bike build at some point.
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Old 02-28-12, 07:28 AM
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Originally Posted by FPSDavid View Post
I sure do think 105 black would look slick on my bike!
Absolutely. I agree. I really like 105 Black.
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Old 02-28-12, 07:34 AM
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Originally Posted by rangerdavid View Post
You really can't go wrong with Tiagra components. For a solid, reliable, entry level group set, it's hard to beat.

On the other hand, if you are going to spend mony on upgrades, my recommendation is not to take baby steps. If you're going to upgrade, UPGRADE. Riding a Sora/Tiagra, or just a Tiagra set if fine, but as was said above, a real noticable upgrade would be to 105, Rival, Force, Ultegra, etc.....

I rode my Tiagra group set for 2 1/2 years. Put thousands of miles on it. It performed great!! I've now upgraded to a new 2012 Rival group set. I am, however, keeping the Tiagra set for a winter bike build at some point.
Agreed. For general recreational riding, Tiagra is great. But once one gets
more aggressive with their riding, a jump to 105+ is very noticeable.

Granted, I jumped to Dura-Ace and was immediately pleased,but I wouldn't be surprised if
going from Tiagra to 105 was as noticeable a difference as it was for me to go to Dura-Ace.

It's really in the extremes that one can tell the difference between the upper echelon of Shimano's groups
(105/Ultegra/Dura-Ace). If I were buying an entry-level bike today, I'd feel fortunate to have a Sora/Tiagra
group on it over 2300 or anything less.

Last edited by 2ndGen; 02-28-12 at 07:47 AM.
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Old 02-28-12, 08:51 AM
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Have you looked into Apex?
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