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Can I swap a sram 11spd cassette for a SRAM 12spd cassette?

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Can I swap a sram 11spd cassette for a SRAM 12spd cassette?

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flag Rob-theferns
Posted: Jun 23, 2020 at 13:04 Quote
Hi there

I have just bought a set if used wheels with an XD driver. The previous owner had this set up as a 1 x11 SRAM NX drivetrain. My question is, can I simply buy a 12speed NX drivetrain and put the cassette straight on the XD driver?
Thanks in advance
Rob
flag the-one1
O+
Posted: Jun 23, 2020 at 13:45 Quote
No. NX cassette is not XD. Its HG.

You sure you have an NX cassette and not GX?
flag Reaperactual
Posted: Jun 23, 2020 at 13:50 Quote
Something isn't right Pal. Sram NX cassettes aren't compatible with XD Drivers.

NX (and SX) require a standard Shimano spline freehub to fit. Maybe the previous owner had an NX groupset but not NX cassette?
flag Rob-theferns
Posted: Jun 23, 2020 at 22:28 Quote
Firstly, thank you so much for the info here. This is my first post and I’m very obviously a complete novice. When I was looking at used wheels, most seemed to be listed as XD or Shimano freehub, can’t say I noticed HG?

This appears much more complicated than first thought! For my own education, please could someone explain then, which common cassettes fit which hubs. Ie NX, SC, XT, SLX.

Thank you in advance
flag ecnonasinoslednam
Posted: Jun 23, 2020 at 23:10 Quote
Rob-theferns wrote:
Firstly, thank you so much for the info here. This is my first post and I’m very obviously a complete novice. When I was looking at used wheels, most seemed to be listed as XD or Shimano freehub, can’t say I noticed HG?

This appears much more complicated than first thought! For my own education, please could someone explain then, which common cassettes fit which hubs. Ie NX, SC, XT, SLX.

Thank you in advance

All Shimano 9,10 and 11 speed fit HG, as does Sram SC and NX (11 or 12 speed). Anything Sram GX or above, 11 or 12 speed, requires XD driver. Shimano 12 speed requires Microspline. You can upgrade to NX 12 speed with an HG freehub, but you won't get the spread of gears that you will with GX or above.
flag Reaperactual
Posted: Jun 23, 2020 at 23:13 Quote
All Shimano cassettes use HG (hyper glide) standard splined freehubs except for newer Shimano 12 speed cassettes which they developed the Microspline freehub for.

Most Sram and other brands (with a few exceptions) also use HG (Sram calls it PG power glide which is the same thing) standard Shimano splined freehubs too including the NX and SX versions.

Shimano freehubs are limited to only being able to fit an 11 tooth small cassette cog!

XD and Microspline were only developed to be able to allow cassettes to have a 10 tooth small cog for improved gear range. Example:-
Sram GX Eagle 12 speed (10-50) fits onto an XD Driver.

Sram NX Eagle 12 speed (11-50) fits onto a Shimano freehub.

If you look at and count the teeth on small cog or search spec for any cassette which has less than 11 teeth on the small cog it isn't a standard Shimano splined freehub that it fits to.
flag Rob-theferns
Posted: Jun 24, 2020 at 13:18 Quote
Thanks for this info, I think I might have been confusing several things here - infact I definitely was.

Turns out I have HG hub! So, am I right in thinking if I want to go 12spd, SRAM NX would fit just fine?

Thanks again and apologies for naive questions.
flag Rob-theferns
Posted: Jun 24, 2020 at 13:21 Quote
It’s a hope pro 4 hub.
flag ecnonasinoslednam
Posted: Jun 24, 2020 at 13:34 Quote
Yes NX will fit. It's also easy to change to an XD driver with Hope.
flag Rob-theferns
Posted: Jun 24, 2020 at 13:36 Quote
Thanks everyone, first time posting and couldn’t be happier with the solid advice I’ve received.

Thanks so much.
flag Reaperactual
Posted: Jun 24, 2020 at 13:42 Quote
I have a Hope Fortus wheelset with Pro 4 hubs, Shimano HG standard spline freehub fitted with a Sram NX cassette (11 speed) so you can definitely fit your NX 12 speed cassette to your rear wheel.

Note:- Hope Pro 4 freehubs are road width rather than mtb width and are a little wider. You need a 1.85mm freehub spacer fitted between the hub and cassette.

This spacer usually comes supplied with Hope rear hub/wheel so you may have one already? If not they're cheap to buy and easy to find.
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