SRAM XDR body on mountainbike hub

[Anders]

I'm building a wheelset for my Cannondale Fsi 2019 which is boost standard.tø The rearhub will be a DT Swiss 240S 12x148. I Will only use it for gravel riding and would like to have the Force XG-1270 cassette with the 10-36 gearing. The wheelset comes with the XD body which I plan to exchange for the XDR to fit the cassette.

My question is if the index on this setup will match my mountainbike wheelset with a XD body and X0 XG-1275 10-50 gearing or I need to adjust the gears? Will the RD shift fine with the 10-36 in the whole range?

Thanks Anders

[scant]

you'll need to adjust the B-tension as the largest cog is so much smaller & obviously shorten the chain length

[MayhemSWE]

I don't think that will ever work satisfactorily. The Eagle derailleur is only made to shift a 10-50T cassette, the gap down to a 10–36T cassette would be huge. Also the 10–36T cassette is only designed to mesh with a flat top chain which definitely would not work with the upper pulley of an Eagle derailleur.

According to Gerard Vroomen a better alternative would be to use a Rotor 11-39T cassette and a KMC X12 chain.
https://blog.3t.bike/2020/05/14290/sram ... bike-tech/

[Anders]

Don't you think the gab will be reduced by the long chain not causing the RD to rotation as much as on a large cassette?

If I run the normal chain I won't have an issue with the pulley I guess. There might be something with the shift quality. Only Way to find out seems to try it out. Regarding gearing options I would have liked a 9-33 cassette to that extra gearing on the top for Road sections, but seems only available on mountainbike cassettes.

[Anders]

Finally got my new wheels and fitted the XDR body and XG-1270 10-36 cassette. Shifts perfect on the work stand with the XX1 Eagle RD.

[rolfo]

Finally got my new wheels and fitted the XDR body and XG-1270 10-36 cassette. Shifts perfect on the work stand with the XX1 Eagle RD.

And how does work in real life, with the 12 sp xx1 eagle shifters?

Best regards Rolf

[moyboy]

XDR driver just uses a spacer ring to accommodate XD so it's fine.

[samarskyrider]

Bumping up old thread, but hopefully someone has the experience in the following.

I'm planning to build a new wheelset for my gravel bike and target DT Swiss 350 straightpull hubs paired with 10-44 SRAM XPLR cassette.
Trick is - I want 28H wheels, but XDR freehub is only offered for 24H road hubs.

Did anyone swapped XD freehub on MTB hubs for XDR road freehub? Does this combo work and I can go ahead and order MTB 28H XD hubs and run it with XPLR cassette?

[boots2000]

Like Moyboy says- Put a 1.8mm spacer on the XD and call it good. No need to switch bodies.

[samarskyrider]

Like Moyboy says- Put a 1.8mm spacer on the XD and call it good. No need to switch bodies.

Thing is that XDR is longer than XD


Sent from my iPhone using Tapatalk

[TobinHatesYou]

Like Moyboy says- Put a 1.8mm spacer on the XD and call it good. No need to switch bodies.

I believe you’ve confused yourself here.

[boots2000]

You are correct. I was confused. It is the opposite where you can use a spacer. Running mtb cassette on XDR hub.

Like Moyboy says- Put a 1.8mm spacer on the XD and call it good. No need to switch bodies.

I believe you’ve confused yourself here.