Is LTWOO R9 Disc 2x11 compatible with UDH hanger?

[PeterJG81]

Anyone who possess LTWOO R9 Disc 2x11 group is using UDH hanger with it and can confirm compatibility ?

[frnchy]

All groupsets aside from SRAM full mount (Transmission and RED XPLR) are compatible with a UDH hanger, as it’s just a derailleur hanger like any other.

[Blueberry]

All groupsets aside from SRAM full mount (Transmission and RED XPLR) are compatible with a UDH hanger, as it’s just a derailleur hanger like any other.

I think you have part of that backwards. UDH is compatible with any groupset (including LTWOO), Red XPLR and Transmission are ONLY compatible with UDH. Not non-compatible.

[frnchy]

I think you have part of that backwards. UDH is compatible with any groupset (including LTWOO), Red XPLR and Transmission are ONLY compatible with UDH. Not non-compatible.

I was talking about a UDH hanger; you’re right if defining “UDH” as the frame specifications (which is what SRAM does, so I suppose you’re more correct than me) - but if OP has a UDH hanger in hand, wondering about a groupset that is not Full Mount, then there’s not much of a distinction to be made.

[Serge_K]

Is there a video / content that's the authority on all that? The topic is extremely confusing.

[PeterJG81]

I think I found an answer on YouTube

Looks like UDH (attachment, printscren from YT movie), correct?

[frnchy]

I think I found an answer on YouTube

Looks like UDH (attachment, printscren from YT movie), correct?

Nope. Google UDH and it looks markedly different.

Is there a video / content that's the authority on all that? The topic is extremely confusing.

SRAM has some videos that address this directly: youtube.com/watch?v=kjgb0pUpn4c for the UDH intro and youtube.com/watch?v=uLPQgMUjPu4 for more on full mount (transmission). But it's not even that complicated* - if you have ANY groupset other than SRAM's latest MTB or RED XPLR, then UDH is just another hanger standard and nothing changes functionally.

*for carbon bikes... custom metal bike makers did a lot of handwringing when UDH came out since it's not so easy to braze/weld in plate dropouts for UDH, but it seems like most have transitioned over. See https://forum.customframeforum.com/t/udh-standard-or-scam/442 for a fun long read.

[PeterJG81]

Thank you Everyone for all valuable insights. This forum is magic.


Could we then just sum up that UDH hanger will work 100% fine with LTWOO R9 Disc 2x11 ?

[klindsey00]

Yes, UDH is just a type of hanger. any standard non direct (aka anything that is NOT a UDH sram T type RD) will work fine. Therefore we can conclude Ltwoo r9 works fine with a UDH hanger