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Deraileur extension

Old 10-18-19, 08:51 PM
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CycleryNorth81
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Deraileur extension

Has anybody use these rear derailleur extension? These extension are suppose to increase the large cog capacity of your derailleur. Do they work well?


Last edited by CycleryNorth81; 10-18-19 at 09:11 PM. Reason: correction
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Old 10-18-19, 09:19 PM
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They seem to work well - there was a pretty good dsicussion on the "do this" Coppi thread.
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Old 10-18-19, 09:20 PM
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They do as advertised...

https://www.wolftoothcomponents.com/products/roadlink
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Old 10-19-19, 11:37 AM
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That is an interesting and elegantly simple contraption. It should work pretty well for us half step gearing fans, since we don't have a large drop up front to exacerbate the chain wrap issue.
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Old 10-19-19, 04:25 PM
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Originally Posted by John E View Post
That is an interesting and elegantly simple contraption. It should work pretty well for us half step gearing fans, since we don't have a large drop up front to exacerbate the chain wrap issue.
This contraption seems like a great idea. It would let us keep our short cage derailleur on a bigger cog.
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Old 10-20-19, 07:16 AM
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Most people, I'm sure, are already aware of this, but the adaptor doesn't in increase chain wrap. In other words, it does let you use a bigger cog in back, but the total capacity of your rear derailleur doesn't change.
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Old 10-20-19, 08:24 AM
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I used the original Wolftooth Roadlink on my 11sp gravel bike for a few years. It's easy to install, solid once installed, and simple.
I ended up passing it along to another rider for the Coppi. Neat that it works well for c&v speed drivetrains too.

As for the generic/knockoff versions, I would assume they work as long as they are the same geometry and measurements as the Roadlink. It's a simple piece of machined aluminum, not complicated, so tough to mess up copying it.
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Old 10-20-19, 08:41 AM
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Someone recently posted a bike with one of those on it and I could't really figure out what it was.
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Old 10-20-19, 09:04 AM
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These work well, and even work in combination with a claw adapter, if you have one of those. I have one (of the cheap eBay ones) on my '70 Peugeot.


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Old 10-20-19, 10:10 AM
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I have two friends who use the Wolf Tooth version, one of which has it on a Campy set up despite the company saying they can't guarantee results with Campy. The ones pictured in the OP look like the knock off versions I've seen on an internet auction site.
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Old 10-20-19, 12:58 PM
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In retrospect, it's interesting that this sort of thing is only catching on now. Think of all the riders decades ago wished they get get a bigger cog under their racing derailleur.
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Old 10-20-19, 01:25 PM
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I recently bought a Wolfstooth for my old Super Record equipped bike, I havent installed it yet but if it works that Great. If not, well it was only $19.

Im wondering if my chain length will be aqdequate for the bigger rear cog, but I have a few chains laying around that should work.
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Old 10-20-19, 04:06 PM
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The Roadlink adds 25mm clearance. It is simple and easy to install.

Pro's: seems to work with everything from 6sp to 11sp (on my stuff, anyway).
Con's: tt can pivot on the RD hanger if not mounted correctly. (on a Y-Foil).

I have no idea if the Chinese "We-Don't-Care-About-Patents-Copyrights-or-Intellectual-Property-Rights-We-Copy-Anything-We-Feel-Like-and-our-Goverment-Subsidizes-It" versions work the same.
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Old 10-20-19, 05:23 PM
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Originally Posted by ThermionicScott View Post
In retrospect, it's interesting that this sort of thing is only catching on now. Think of all the riders decades ago wished they get get a bigger cog under their racing derailleur.
That's a really good point that hadn't occurred to me. There was no cheap CNC machining in those days, but it would have been even easier to just stamp them out like derailleur claws. It's not like people recoiled in horror from stamped-steel parts in those days.

Unlikely as it seems, I guess it just hadn't been thought of yet. You'd think it would have occurred to someone.

[note to self: think of another gizmo like this and become wealthy.]
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Old 10-20-19, 07:06 PM
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Originally Posted by jonwvara View Post
That's a really good point that hadn't occurred to me. There was no cheap CNC machining in those days, but it would have been even easier to just stamp them out like derailleur claws.
Or even stamp longer claws! I recently asked about different lengths of hangers for this very reason. The (correct) answer is there is really only one length of those claws. I acknowledge that most nicer bikes use integrated hangers, and have done so for the last four decades or so...but it still is curious that this was "never a thing" back in the day.

Of course, back then, a "big" freewheel or cassette sprocket was 24t...real cyclists rode a maximum of 21t, right? (And only on the 53t ring!)
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Old 10-20-19, 09:42 PM
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I have a "real" Roadlink on my modernish Roubaix with 105 long cage. Works great. I keep meaning to try one on my old school Campy Gran Sport which maxes out at 28t. Anybody done that?
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Old 10-20-19, 11:03 PM
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Simplex Maxi Prestige Long Arm Derailleur

Originally Posted by hokiefyd View Post
Or even stamp longer claws! I recently asked about different lengths of hangers for this very reason. The (correct) answer is there is really only one length of those claws. I acknowledge that most nicer bikes use integrated hangers, and have done so for the last four decades or so...but it still is curious that this was "never a thing" back in the day.

Of course, back then, a "big" freewheel or cassette sprocket was 24t...real cyclists rode a maximum of 21t, right? (And only on the 53t ring!)
au contraire mon frere

Alpine Gearing found on most non racing bike boom models had 14-28T 5sp FWs with 52-42T, 52-40T or 52-36T cranks. The standard Simplex Prestige RDs could usually handle those range gears.

Simplex Maxi Prestige ca 1972-73. They had a long claw attachment plus a long arm pulley cage. I only saw a few of them in the steel. They were on "touring" mixte bikes, usually with 14-32 5sp FWs.

There were many different length claw hangers depending on brand but few/none as long as these.




1972-73 Simplex catalog page from velo-pages.com showing the Simplex Maxi Presitge front and rear derailleurs.


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Old 10-21-19, 12:24 AM
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Originally Posted by CycleryNorth81 View Post
Do they work well?
They do what they're supposed to do, i.e. move the derailleur downward so that it can clear a bigger cog. Sometimes this can result in slightly balkier rear shifting than using a derailleur which is actually designed to sweep across the intended cluster. Depending on the specifics of the situation it may or may not actually matter.

People mostly seem to end up happy with them.
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Old 10-21-19, 07:58 AM
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Originally Posted by HTupolev View Post
People mostly seem to end up happy with them.
Glad to hear that. Thanks for the feedback.
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Old 10-21-19, 08:15 AM
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Originally Posted by Slightspeed View Post
I have a "real" Roadlink on my modernish Roubaix with 105 long cage. Works great. I keep meaning to try one on my old school Campy Gran Sport which maxes out at 28t. Anybody done that?
@speedevil mounted one on an older (stunning) Masi. Works well.

Originally Posted by HTupolev View Post
They do what they're supposed to do, i.e. move the derailleur downward so that it can clear a bigger cog. Sometimes this can result in slightly balkier rear shifting than using a derailleur which is actually designed to sweep across the intended cluster. Depending on the specifics of the situation it may or may not actually matter. People mostly seem to end up happy with them.
Yep. They are not happy with a lot of chain tension. For example, my DA7700GS RD ("medium cage") was not a real fan of climbing a mountain under a 39t front and 32t rear, but it handled the 30T just fine. "Balky" is a perfect description.

I added the Roadlink, and it's much quieter and less balky now, even running 53t front and 34t rear. But when I say much quieter, I don't mean it's groovy smoothy quiet. On the small ring up front, no issues, and that's what it's for, anyway, but when I'm lazy stupid climbing, I sometimes forget my left hand exists, and go big/big. It would be disaster on the standard setup, but with the Roadlink, there is forgiveness and redemption. I'll take it where I can get it.

There is also a company that alters Di2 RD's to clear up to 40t rear cogs. As the cycling crowd ages, they are moving towards staying more relaxed and more aerobic while climbing. This is leading to larger rear cassettes as people spin up the ascents while watching their HR monitors, etc.

Given my recent foray into never-never-HR land, I understand this.
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Old 10-21-19, 10:44 AM
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@ascherer put one of these on his bike, and he's happy. Right, Andy?
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Old 10-21-19, 10:51 AM
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Originally Posted by Slightspeed View Post
I have a "real" Roadlink on my modernish Roubaix with 105 long cage. Works great. I keep meaning to try one on my old school Campy Gran Sport which maxes out at 28t. Anybody done that?
I used one on my International with a Nuovo Record to clear a 30 or 32 in back, I forget which. No issues.
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Old 10-21-19, 11:10 AM
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Thanks, guys. Good to know. I've got 34t Megarange Freewheels on two Raleighs with VGT Luxe RDs, but I'd like to try something like that on my '64 Legnano with old Campy Gran Sport for Eroica. The good thing is that it's easily reversible, unless you get to like it too much. 😉
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Old 10-21-19, 01:51 PM
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Originally Posted by hokiefyd View Post
Or even stamp longer claws! I recently asked about different lengths of hangers for this very reason. The (correct) answer is there is really only one length of those claws. I acknowledge that most nicer bikes use integrated hangers, and have done so for the last four decades or so...but it still is curious that this was "never a thing" back in the day.

Of course, back then, a "big" freewheel or cassette sprocket was 24t...real cyclists rode a maximum of 21t, right? (And only on the 53t ring!)
If someone showed up with a 13-21 freewheel at a team ride or club race they had to endure the shame of riding with a "pie plate"
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