Shimano Triple

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stoneywood21

Well-Known Member
Location
Stirlingshire
The front changer on my Shimano 105 Triple moves from middle to big ring with one "click", but needs two "clicks to drop back down.
Is this usual?
 

Tommy2

Über Member
Location
Harrogate
Is is to do with the trim, so when you're in the middle ring you can use the full range of gears without the front mech rubbing the chain.
somebody will be along to confirm.
 
Location
Pontefract
Right when your on the middle ring, the range or movement of the chain on the rear cassette is usually too much to do it with out some chain rub on the extremes, the trim allows the FD cage to be repositioned slightly to allow the full range of rear gears, same is true on the inner and outer rings too, but usually the chain noise gets noticed as chain rub, but if set up right, its the extreme angle the chain is that is causing the noise.
 

Levo-Lon

Guru
What they said..
Its stops the rubbing when in high or lowest rear cog, but good use of front gears is a good thing to get into as it will put less stress on the chain and gears.
cleaver stuff these gears as dropping from large front to inner and dropping 3 rear gears at the same time puts you in about the same cadence if u have 2x10 ,so you dont suddenly spin like a nutter,and this applies the other way too. When going inner to large its just a case of push both levers fully inward for same cadence..though you would need to be in a higher rear which you should be for the change from inner to big..
this is on my 50,34 tiagra btw but should apply to most gear set ups wheather its a 2x10 0r a3x9 or 10,then use the trim for a quiet ride
Hope that makes sense as im lost now lol
 
OP
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stoneywood21

stoneywood21

Well-Known Member
Location
Stirlingshire
Going back to my "two clicks to drop back down."
In practical terms, does this mean that there would be benefit in staying in big ring and clicking "down" once?
Been cycling for 50+ years. First road triple. ( none of this on my Rockhopper)
Can manage front/rear combinations fine, but is this refinement necessary?
 

boydj

Legendary Member
Location
Paisley
As long as you have another click to take you to the inner ring, it's not a problem. It sounds like it's a design issue related to the trim function.
 
Location
Pontefract
Going back to my "two clicks to drop back down."
In practical terms, does this mean that there would be benefit in staying in big ring and clicking "down" once?
Been cycling for 50+ years. First road triple. ( none of this on my Rockhopper)
Can manage front/rear combinations fine, but is this refinement necessary?
This is the trim, mine does it, before the first click its set for the lower end (high gears) of the cassette first click will set it so the upper end (low gears) is more usable and avoiding chain rub on the lower gears.
The first will be quite light as it only move the cage a little, then a more positive to to drop it down to the middle, where by its likely a to be useful in the lower gears and a little push on the brake lever inwards will move the cage a little to enable the higher gears to be used with out rub.
 
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OP
stoneywood21

stoneywood21

Well-Known Member
Location
Stirlingshire
Thanks to all.
I have been cycling around without using this intermediate position for two years, but will now give it a try.
(Hope it does'nt slip and leave me biting the bars.) :wacko:

DGB
 
Location
Pontefract
It is actually very good on my middle ring as it allows me to use all my gears on the rear, my front middle is a 38th coupled with a 12-13-14-15-16-17-19-21-24-27, but with having the 26th inner I am looking at replace that with a 12-23 in the New Year. my front is a 26/38/50
 
Location
Pontefract
@stoneywood21 nothing wrong with that, I was just highlighting the options triples have over compacts, even a 26x23 is a pretty low gear on a road bike a standard 50/39/30 setup with the cassette I currently have 12-27 has a range of 29.4-110.4" the setup I am looking at will have pretty much the same but a much closer cassette 50/38/26 with a 12-23 is 30-110.4", but should I need lower I would then be able to refit my current cassette for a 25.5-110.4" range, but I personally find the jump between 17-19 quite large, but thats me we are all different and find our own ideals.
 
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