[RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[lconley]

>
> IRD sells a front derailleur specifically for sub-compact double cranksets 
> called the Sub-C. It is all silver - the back in the picture below is the 
> sold-separately clamp.
>

[image: image.jpg]

Laing
Delray Beach FL
 

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[RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[Jim M.]

I'm using a Deore XT front derailer, but I'm not sure which model. What 
helped me with the setup was using the Microshift thumb shifters that Riv 
sells.
https://www.rivbike.com/collections/shifting/products/microshift-thumb-shifters-9-speed-sl-t09?variant=41310793549

Works really well for me. I'll see if I can find the model number in the 
daylight.

jim m
wc, ca

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[RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[Nathan F]

I had the same issue when setting up my girlfriend's Cheviot last year. She 
runs the Silver 34/24 crank set up with a 9 speed drivetrain, set up with 
trigger shifters. At first I tried a cheap triple, which didn't work as 
well as I'd have hoped (would've been fine if run friction). Then a Sora 
double, which didn't work at all (unique pull ratio, again would've been 
fine if run friction). 

Eventually I settled on a 10-speed Deore XT FD-M785. It works perfectly, 
and I found the "low clamp" much easier to set up than other styles, as the 
clamp is below the small chainring. Yes it's not an elegantly forged piece 
of art, but hey it's got a silver cage and the uglier bits are hidden 
behind the crankset.

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[RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[Nick Payne]

I use MTB 2x FDs for this purpose. Here's a XT 2x10 M786 front derailleur 
that I used on a bike setup with 32-22 chainrings. The FD clears the 
chainstay.




Nick

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Re: [RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[Garth]

  Jason there was a photo of a Microshift FD in an email or blahg that they 
bought to try for small rings. Looking at their catalog there are 2 such 
FD's . The "s" after the model denotes the "shorter chainstay" models which 
have a shorter cage. Note the 36-50t "top gear" ring. I could only find 
these for sale overseas as I'm not privy to business sources to get them. 
Who knows if they will start selling them. 

https://www.microshift.com/en/product/fd-r74s-bf/
https://www.microshift.com/en/product/fd-r52s-bf/


On Sunday, September 13, 2020 at 2:03:30 PM UTC-4, Jason Fuller wrote:
>
> I am really hoping Grant is working on a Silver FD to solve exactly this 
> issue - it would be a godsend to have a simple & classy looking front 
> derdeder optimized for low range doubles (ie max 42T).  I would buy 
> several.   

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Re: [RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[Joe Bernard]

"Since it is basically a triple with the large ring not there and a guard 
in it’s place wouldn’t a triple FD work?"

Yes, it just looks odd because it sits so high over a guard barely bigger 
than the "middle" ring. This "problem" started with Grant's original plan 
to have these cranks run without front derailers, we were supposed to kick 
the chain over or use a stick. That idea never made it to new complete Rivs 
nor did it catch on with any of us, so now we have small-ring doubles with 
a small outer guard and big gaps to derailer cages. Whoops!

Joe Bernard 


On Sunday, September 13, 2020 at 11:18:00 AM UTC-7 Joel wrote:

> Since it is basically a triple with the large ring not there and a guard 
> in it’s place wouldn’t a triple FD work? 

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Re: [RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[Joel]

Since it is basically a triple with the large ring not there and a guard in 
it’s place wouldn’t a triple FD work? 

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Re: [RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[Jason Fuller]

I am really hoping Grant is working on a Silver FD to solve exactly this 
issue - it would be a godsend to have a simple & classy looking front 
derdeder optimized for low range doubles (ie max 42T).  I would buy 
several.   

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Re: [RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[Lyman Labry]

Riv set up a Homer for me this spring using a FD-CX70 with the Silver 34-24
x 9spd and non-indexed shifters. Works fine.
Lyman in Austin

On Sun, Sep 13, 2020 at 4:20 AM brendonoid  wrote:

>
> I currently have a FD-CX70 (that riv used to sell) running indexed with a
> 3x LX trigger shifter from the 90s. Works great but like others said you
> have to have a big gap. Align it with an imaginary 3rd ring in the crank
> and you'll be fine. If you aren't trying to index just about any old
> derailleur can be made to work.
>
> Love this crank for its Hillibiking competence. and the steel chainrings
> are super strong to boot.
> On Sunday, 13 September 2020 at 16:46:07 UTC+8 Garth wrote:
>
>>
>>Yes to what DougP has stated. Relax the FD gap !   I have a seeming
>> large gap also on my Bombadil 24/36/44 crank with a road FD, whose radius
>> doesn't really match at all.  On top of that the flat regular 44t ring is
>> reversed, as 44t rings are designed for middle/small use. So in "theory"
>> it's just all messed up, but reality isn't a theory. I use a little more
>> finesse to shift to the big ring, and it just works. That's the beauty of
>> all this manual shifting stuff, it's very fluid and adaptable and friendly.
>>
>
>
>
>
>
>
>
>
> --
>
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> 
> .
>
>
>

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[RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[brendonoid]

I currently have a FD-CX70 (that riv used to sell) running indexed with a 
3x LX trigger shifter from the 90s. Works great but like others said you 
have to have a big gap. Align it with an imaginary 3rd ring in the crank 
and you'll be fine. If you aren't trying to index just about any old 
derailleur can be made to work.

Love this crank for its Hillibiking competence. and the steel chainrings 
are super strong to boot.
On Sunday, 13 September 2020 at 16:46:07 UTC+8 Garth wrote:

>
>Yes to what DougP has stated. Relax the FD gap !   I have a seeming 
> large gap also on my Bombadil 24/36/44 crank with a road FD, whose radius 
> doesn't really match at all.  On top of that the flat regular 44t ring is 
> reversed, as 44t rings are designed for middle/small use. So in "theory" 
> it's just all messed up, but reality isn't a theory. I use a little more 
> finesse to shift to the big ring, and it just works. That's the beauty of 
> all this manual shifting stuff, it's very fluid and adaptable and friendly. 
>

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[RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[Garth]

   Yes to what DougP has stated. Relax the FD gap !   I have a seeming 
large gap also on my Bombadil 24/36/44 crank with a road FD, whose radius 
doesn't really match at all.  On top of that the flat regular 44t ring is 
reversed, as 44t rings are designed for middle/small use. So in "theory" 
it's just all messed up, but reality isn't a theory. I use a little more 
finesse to shift to the big ring, and it just works. That's the beauty of 
all this manual shifting stuff, it's very fluid and adaptable and friendly. 

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[RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[Joe Bernard]

Oh, I missed an important  data point. I'm using a 10-speed fd with a 
9-speed chain, which is as much as you can fudge that. A 7/8-speed chain 
would be way too wide. 

On Saturday, September 12, 2020 at 10:07:07 PM UTC-7 Joe Bernard wrote:

> Yes, what Doug is saying. I think you're trying too hard to get the fd 
> down close to what your eyes say is the big ring, but the ring is in the 
> middle position on that crank. I have a 36/24 crank with a bigger 
> chainguard in the outer position, and a Deore XT double similar to your fd 
> resting above that big guard. It works fine this way, I think your derailer 
> needs to slide up to meet an imaginary big ring or guard. 
>
> On Saturday, September 12, 2020 at 9:47:57 PM UTC-7 dougP wrote:
>
>> Rivendell must have an answer.  I recall hearing that the ideal gap from 
>> the outer cage plate to the big ring should be 2 mm (1/8") but that may be 
>> an ideal, not a hard'n'fast requirement.  
>>
>> On my Atlantis, I have a 24/34/44 triple & 11-36 9 speed with a Shimano 
>> Deore (no other ID on it; nothing special) FD.  With the FD clearing the 
>> chainstay by a whisker, there's a good 1/4" gap from the outer cage to the 
>> 44 ring.  So on the 34, the outer cage plate has to have a huge gap to the 
>> 34 chainring.  I rarely use the 44, so it's pretty much 34 for 99% of the 
>> time & I can get all 9 cogs without fussing.  On the rare occasion I need 
>> the 24, everything seems to work fine; no dropped chains or overshifting on 
>> the upshift. All flat rings, no ramps'n'pins.
>>
>> dougP
>>
>>
>> On Saturday, September 12, 2020 at 8:56:06 PM UTC-7, Justin Wyne wrote:
>>>
>>> As much as I love the looks of this crankset, I feel like it should come 
>>> with a disclaimer of "good luck finding a front derailleur that'll work". 
>>> Does anyone else have this crankset, if so what front derailleur are you 
>>> using? The previous 2 I've tried can't get low enough to the big ring to 
>>> call it a safe distance before hitting the cage on the chainstay. Most 
>>> recent failure being the Shimano fdm618 low that although can be mounted 
>>> low enough, just cant seem to get properly adjusted enough to allow even a 
>>> millimeter of quiet non chain rub which requires constant trimming. I'm 
>>> running 2x7.
>>
>>

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[RBW] Re: Front Derailleur for Riv Silver 34/24 cranks?

[dougP]

Rivendell must have an answer.  I recall hearing that the ideal gap from 
the outer cage plate to the big ring should be 2 mm (1/8") but that may be 
an ideal, not a hard'n'fast requirement.  

On my Atlantis, I have a 24/34/44 triple & 11-36 9 speed with a Shimano 
Deore (no other ID on it; nothing special) FD.  With the FD clearing the 
chainstay by a whisker, there's a good 1/4" gap from the outer cage to the 
44 ring.  So on the 34, the outer cage plate has to have a huge gap to the 
34 chainring.  I rarely use the 44, so it's pretty much 34 for 99% of the 
time & I can get all 9 cogs without fussing.  On the rare occasion I need 
the 24, everything seems to work fine; no dropped chains or overshifting on 
the upshift. All flat rings, no ramps'n'pins.

dougP


On Saturday, September 12, 2020 at 8:56:06 PM UTC-7, Justin Wyne wrote:
>
> As much as I love the looks of this crankset, I feel like it should come 
> with a disclaimer of "good luck finding a front derailleur that'll work". 
> Does anyone else have this crankset, if so what front derailleur are you 
> using? The previous 2 I've tried can't get low enough to the big ring to 
> call it a safe distance before hitting the cage on the chainstay. Most 
> recent failure being the Shimano fdm618 low that although can be mounted 
> low enough, just cant seem to get properly adjusted enough to allow even a 
> millimeter of quiet non chain rub which requires constant trimming. I'm 
> running 2x7.

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