The 'Un-Official' Campagnolo Ekar thread

[rain dogs]

Originally Posted by thirdgenbird

There are two designs. It’s not early vs late. It’s a manner of what type. Shimano makes both type of derailleurs for current groups. You can use a 2x RD in 1x but not a 1x in a 2x setup. At least not without issue.

Design 1 uses a slat parallelogram. This design uses the parallelogram geometry to follow the cassette profile. When you shift from the small ring to the large ring, the cage rotates and it doesn’t dramatically change the distance from the cassette.

Design 2 uses a near horizontal parallelogram with a pulley cage with a very offset upper pulley. This design uses chain length/tension to control distance to the cassette. You can do this on 1x because the only thing that changes the chain length is rear cog size. If you were to use this design with a front derailleur, you would have two variables. Your front derailleur would be changing your effective b-tension. You would either be too far away in the big ring or crashing onto the cassette in the little ring.

You can see this in action if you watch a video of ekar or similar designed derailleurs shifting.

Cool. Thanks. DO you have a video link handy? I've been searching for Ekar shifting on youtube but not seeing anything.

NVMND..... I see the action in this video (https://www.youtube.com/watch?v=tptAGcNNjrA). It ultimately looks like it would be a capacity issue as well. Well... that's lame. Another reason to dislike 1x (lame derailleur geometry). Looks like I'll be waiting forever for a clutch on a Campagnolo derailleur that will wrok with 2x.