34 T cassette deraailleur clearance

[Bernard Duhon]

 

 

Brain Trust,

I have a 34 tooth 9 speed cassette recently installed.

Am friction shifting

 

Have a campy chorus 10 speed rear derailleur that just barely clears the 34 th tooth.

 

Bought a Shimano Altus Rd M310 in anticipation of the chorus not clearing the 34^th tooth.

 

Grant P said the Altus will friction to 9 sp tho designed to index 7 & 8.

 

Two questions

 

1. I am looking for trouble by have the Campy derailleur that barely clears the largest cassette?
2. Will the Altus provide greater clearance?.

 

 

[Nick A.]

Hey there Bernard. Not sure about the answer to your first question but shifting under load always kinda changes the situation a bit in my experience. As for the Altus, I'm running an 11-34 10s cassette via friction and it works a treat.

Happy shifting!

Nick in FC

[Jim M.]

If you want to try to make the Chorus work, you could reverse the b screw to add a little more reach, or you could try a Wolf Tooth Roadlink hanger extender. I've used the Roadlink with good results.

jim m

walnut creek ca

[Bernard Duhon]

Thanks,  but my fancy campy rd has no ‘B” screw.

 

I think I’ll mount the Altus.

 

It is only too close for comfort on the 34T

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[Benz Ouyang, Sunnyvale, CA]

On Sunday, April 14, 2024 at 6:56:15 PM UTC-7 Bernard Duhon wrote:

Thanks,  but my fancy campy rd has no ‘B” screw.

Actually, your fancy 10-speed Chorus rear derailleur does. It's just not in the same location as the Shimano/SRAM ones. The Campagnolo chain tension adjustment screw is actually on the cage itself:

(image taken from http://www.raltech.co.uk/Prod_96-Inst-RMC-Campag.html)

Here's a video explaining how to do the adjustment, but other than the location of the screw, the concept is the same other than any other modern derailleur.

 

[Bernard Duhon]

Ah ha.

Took my stupid pill 💊

There it is.

 

Even the product booklet does not show it.

 

Thanks.

 

From: rbw-owne...@googlegroups.com <rbw-owne...@googlegroups.com> On Behalf Of Benz Ouyang, Sunnyvale, CA

Sent: Monday, April 15, 2024 12:01 AM
To: RBW Owners Bunch <rbw-owne...@googlegroups.com>

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