Originally Posted by
relnix
I'm in the market for a new groupset, upgrading my Shimano 2300s.
I was looking at the 105 group then I saw the new Sora 9 speed and apparently there's also a new Tiagra 10 speed?
Does anyone have experience with them, how good are they? Should I just stick to the 105's or are the new groups worth bang for the buck?
4700 Tiagra is 5600 105. Shimano trickles everything down when new groups come out. It's the same way with new 105 (5700); it is the same as previous Ultegra for the most part. It has the smaller hoods, cables under the tape, etc... 10 speed has moved its way down year by year from Dura Ace to Tiagra, 11 speed is down to Ultegra now along with Di2, and it just keeps going this way.
Now that you're confused I'll give you my opinion
. If your budget is limited and you want 10 speed, go with Tiagra. Like I said before, it's the same as previous 105 and as long as you don't care about cable routing it will work just fine for you. I rode 5600 105 for a long time and never had any trouble at all. I do think it's more durable than the groups below it.