Climbing the walls with Campy--34 x 32 with Potenza/2016 Record

[Tim Porter]

Originally Posted by hollowgram5

If you dig back in the Instagram feed of Skunkworks Bikes, they took a Potenza cage and swapped it onto a Record der for a customer who was headed to the Alps. Might be another option.

Instagram.com/skunkworks_bikes

https://www.instagram.com/p/BItgd4ZBR6s/

Thanks, interesting; I had wondered if anyone had tried it yet.

[Tim Porter]

Originally Posted by ColonelJLloyd

Find yourself in 50/11? If not, switching to a different chainring combo (different crank) makes a lot of sense. But with a new build and matching components I can understand not wanting to go that route.

A Wolftooth Road Link is a cheap experiment. You don't even need to break the chain.

I do use the 11 occasionally; in fact I used it quite a lot on really long descents in Death Valley when I was riding tempo with a buddy for about 12 miles downhill last week! But it's not a common thing.

The reason I'll hang on to the 50/11 is that the 11 serves as a "spacer" so I can use the 34-12 without TOTALLY cross-chaining (i.e., using the small to small combo). 34-12 is a 76" gear, and it's a very useful cruising gear that I use a fair amount. 50-18 would be approx. the same but there's no 18 on this setup.

[oldpotatoe]

Originally Posted by bfd

Looks good! Btw, Campy had a mid-cage Record RD when it was selling 10 speed and it is still available for sale:

http://www.wiggle.com/campagnolo-rec...ar-derailleur/



I wonder if this RD would work with the current 11 speed shifters?

Good Luck!

10s rear der undershifts quite a lot. Alternative cable attach makes it work better but Potenza excellent.

[oldpotatoe]

Originally Posted by Tim Porter

Thanks, interesting; I had wondered if anyone had tried it yet.

Hard part is finding the cage. Could use a rear der as donor but just use the rear der whole, IMHO

[ColonelJLloyd]

Originally Posted by Tim Porter

I do use the 11 occasionally; in fact I used it quite a lot on really long descents in Death Valley when I was riding tempo with a buddy for about 12 miles downhill last week! But it's not a common thing.

The reason I'll hang on to the 50/11 is that the 11 serves as a "spacer" so I can use the 34-12 without TOTALLY cross-chaining (i.e., using the small to small combo). 34-12 is a 76" gear, and it's a very useful cruising gear that I use a fair amount. 50-18 would be approx. the same but there's no 18 on this setup.

Gotta say, I would change the cassette so that you have an 18t cog to use with your outer ring. More convenient to have it with your large ring and easier on your drivetrain.

[hollowgram5]

Originally Posted by oldpotatoe

Hard part is finding the cage. Could use a rear der as donor but just use the rear der whole, IMHO

Right. The Skunkworks example was because it was an EPS bike.. but I agree, mechanical shift, just swap the der itself.

[icepick_trotsky]

How would swapping the cage affect max cog size? That's only affected by the upper part of the RD.

Unless the issue is the overall range of the cassette and chain wrap is the problem.

[bfd]

Originally Posted by oldpotatoe

10s rear der undershifts quite a lot. Alternative cable attach makes it work better but Potenza excellent.

Thanks. Does this undershifting apply to only pre-2015 Campy 11 shifters?

It is my understanding that post 2015 11 speed shifters need their own RDs. So, would this mid-cage RD not be usable wtih post 2015 11 speed shifters too.

Appreciate the help!

[marciero]

Originally Posted by icepick_trotsky

How would swapping the cage affect max cog size? That's only affected by the upper part of the RD.

Unless the issue is the overall range of the cassette and chain wrap is the problem.

This. The design of many "long cage" derailers completely miss the point.

[bfd]

Originally Posted by oldpotatoe

Hard part is finding the cage. Could use a rear der as donor but just use the rear der whole, IMHO

If the part is REC RD-RE002M, then Ochsner has it for $148.50:

http://www.ochsnerusa-store.com/prod...rod=CA-1119201

There's a place called Cycle de Pro that has it for $138:

http://www.cycledepro.com/products/c...ge-medium.html

So, it seems to be available from at least 2 places, but it is definitely not cheap!

Good Luck!

[Ken Robb]

I have used 10 speed Chorus 13-29 cassette with 48-38-28 TA Zephyr cranks and they worked very well for me and I had no odd gaps between gears. I have a 24 tooth ring in the box but never felt a need to replace the 28----yet. :-)

[ColonelJLloyd]

Originally Posted by icepick_trotsky

how would swapping the cage affect max cog size? That's only affected by the upper part of the rd.

Unless the issue is the overall range of the cassette and chain wrap is the problem.

+1

[Ralph]

Am sure a Med cage Potenza Rd is fairly cheap from UK. Why cannibalize a RD, just use a Med cage Potenza with 11's shifters when you use the 11-32. I use med cages for everything....whether I need to or not. No shifting penalty.

[R3awak3n]

Originally Posted by bfd

If the part is REC RD-RE002M, then Ochsner has it for $148.50:

http://www.ochsnerusa-store.com/prod...rod=CA-1119201

There's a place called Cycle de Pro that has it for $138:

http://www.cycledepro.com/products/c...ge-medium.html

So, it seems to be available from at least 2 places, but it is definitely not cheap!

Good Luck!

I think he is talking bout 11 speed potenza cage

[Ralph]

Originally Posted by R3awak3n

I think he is talking bout 11 speed potenza cage

Yes....but one can probably buy the whole Med cage Potenza RD cheaper than just a cage. You generally need a med cage for a 11-32. For good chain take up after a front shift, etc. Less likelihood of throwing a chain. And sure....you can maybe make a short cage work, if you mean by working....it gets up on the big cog. But difference between 34-50 and 11-32 is 37 teeth. Too much to expect a short cage to work correctly.