Experience with IRD cassettes?

[pncguy]

I'm looking for climbing gears and new cranks seem like an expensive way to go. I stumbled upon IRD, who make Shimano-compatible 12-34 and 12-36 11 speed cassettes that should work with my Ultegra 6800.

Does anyone have experience with these?

[charliedid]

Yes

Buy with confidence. Great products and Co.

[Look585]

You can assemble an 11s Shimano 12-34 cassette by doing the following:

Buy HG800 11-34 Cassette.
Buy 6800 12t 1st position cog.
Throw 11t 1st position cog in the drawer/toolbox/dumpster.
Mount 12-34 cassette (no special lockring needed, the HG800 is fine).
Go Ride.

JensonUSA stocks the 12t 6800 1st position cog.
https://www.jensonusa.com/Shimano-Ultegra-6800-11-SPEED-Cog

[pncguy]

You can assemble an 11s Shimano 12-34 cassette by doing the following:

<snip>

Cheaper, too!

[dem]

One caution is their aluminum carrier for the big sprocket is not clearanced around the hub. So if you have an unlucky combination of flange width/height/spoke elbows, it may not clear.

Another option would be SRAM if you can live with 11-36.

[pncguy]

One caution is their aluminum carrier for the big sprocket is not clearanced around the hub. So if you have an unlucky combination of flange width/height/spoke elbows, it may not clear.

Another option would be SRAM if you can live with 11-36.

Just to be clear, this is for the IRD cassette, not the HG800, right?

[dem]

Correct, the IRD cassette.

It was a problem on two wheelsets that had converted 10 speed freehubs (where it was milled down) but not a problem on a native 11 speed hub.

No issue with Shimano or SRAM.

[pncguy]

One caution is their aluminum carrier for the big sprocket is not clearanced around the hub. So if you have an unlucky combination of flange width/height/spoke elbows, it may not clear.

Another option would be SRAM if you can live with 11-36.

Has anyone paired the SRAM 11-36 with a Shimano Ultegra 6800 50/34 and a GS RD? SRAM states emphatically that it only works with a 1x, but I'm wondering if they mean with their RD...

[henrypretz]

Has anyone paired the SRAM 11-36 with a Shimano Ultegra 6800 50/34 and a GS RD? SRAM states emphatically that it only works with a 1x, but I'm wondering if they mean with their RD...

I am running a SRAM 11-36 (1130) with a 6800 GS and 46/34 CX70 crankset with no issues at all. Shifts great, as a matter of fact. I initially put it together using a Roadlink but decided to try it without and it works perfectly.

[pncguy]

I am running a SRAM 11-36 (1130) with a 6800 GS and 46/34 CX70 crankset with no issues at all. Shifts great, as a matter of fact. I initially put it together using a Roadlink but decided to try it without and it works perfectly.

Excellent! Thanks for the feedback. I now have multiple people telling me it will work, so I think I'll pull the trigger!