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Tiagra 4500 vs 105 5800 left STI

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Tiagra 4500 vs 105 5800 left STI

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Old 10-15-16, 09:47 PM
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Inpd
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Tiagra 4500 vs 105 5800 left STI

So I have two bikes now, one with new but the old Style 9 speed tiagra STI and another new 105 5800.

My question is, how close in shift feel can I get the left 4500 STI to be to the 5800 STI?

The 5800 is effortless to change (it's a double) with a very short throw at most 45 degrees. The 4500 (a triple) shifts flawlessly, but requires a bit of effort and the the throw is well above 45 degrees (probably above 60 degrees).

Is that the best the 4500 can do? I know it's older technology.

Thanks in advance.
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Old 10-16-16, 02:45 PM
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The FD had a major redesign for the latest 4700/5800/6800/9000 series, and you will struggle to ever get an older groupset (especially one as old as 4500) to feel as good as the new stuff.
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Old 10-17-16, 10:05 AM
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Inpd
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Originally Posted by jimc101 View Post
The FD had a major redesign for the latest 4700/5800/6800/9000 series, and you will struggle to ever get an older groupset (especially one as old as 4500) to feel as good as the new stuff.
Thanks. But firstly, the FD is a new 3600 (i.e. new Sora 9 speed) but the STI is older 4500 (i.e. 9 speed Tiagra).

Is the left hand 4500 STI worse (compared to 5800) in terms of "throw/deployment" angle and pressure to change rings as I mention?


Thanks again.
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Old 10-17-16, 01:23 PM
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Originally Posted by Inpd View Post
Thanks. But firstly, the FD is a new 3600 (i.e. new Sora 9 speed) but the STI is older 4500 (i.e. 9 speed Tiagra).

Is the left hand 4500 STI worse (compared to 5800) in terms of "throw/deployment" angle and pressure to change rings as I mention?


Thanks again.
The 3500 (there is no 3600 so I take it you mean 3500) is still the old design, the design has changed for 2017 with R3000 Sora, the 3500 FD is the correct match the the 4500 Shifter.

Your correct that the left hand will be worst, as this controls the front derailleur & takes more effort with the old design vs the new one. Unless you changed to the new design (which will mean replacing the shifters and both F&R derailleurs), there isn't too much you can do about it other than replacing the inner & outer cables.
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Old 10-17-16, 03:27 PM
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The front derailleur arm length, pull ratio, and everything has changed with Shimano's newer generation of front derailleurs. There is no surprise that your two setups feel so different and there is no way to change that except by upgrading to all new parts.
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Old 10-17-16, 09:04 PM
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Originally Posted by jimc101 View Post
The FD had a major redesign for the latest 4700/5800/6800/9000 series, and you will struggle to ever get an older groupset (especially one as old as 4500) to feel as good as the new stuff.
Shimano also change increased spacing between the two chainrings for 5700 double crank, probably 6700 also. I'm uncertain where they compensated for the FD movement, whether in the arm/leverage of the FD or whether the left shifter pulls different amount of cable.
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Old 10-18-16, 10:16 PM
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Inpd
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4500 vs Claris STI?

Originally Posted by Chris_W View Post
The front derailleur arm length, pull ratio, and everything has changed with Shimano's newer generation of front derailleurs. There is no surprise that your two setups feel so different and there is no way to change that except by upgrading to all new parts.
So I tried a bike with the Claris STI tonight (Claris is the bottom of the range Groupset introduced i 2014/15).

The left Claris STI shifted the triple with less effort and less throw than the 4500. Does that seem reasonable?
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Old 10-19-16, 03:28 AM
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Originally Posted by Inpd View Post
So I tried a bike with the Claris STI tonight (Claris is the bottom of the range Groupset introduced i 2014/15).

The left Claris STI shifted the triple with less effort and less throw than the 4500. Does that seem reasonable?
It sounds very reasonable to me. 4500 9 speed tiagra is simply older, nearly 10 yrs old. To me, when I was test riding bikes last year, I was more impressed with Claris than I was with even the 4600 10-speed tiagra. (I have since ridden the new 4700 tiagra, and it is VERY good.)...

but for 9 speed, the new 2017 Sora is going to be your best bet...but at minimum, you would need a left shifter and front derrailer...or you could try to find old 9 speed ultegra parts.
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Old 10-20-16, 12:01 PM
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you can try using a polymer cable to improve friction on the 4500, seemed to make a small difference in effort required on my 6700 shifters
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