Fatbike 1x11 drive train

[ootini]

My OnOne fatty is running the stock Sram drive train (2×9 I think) but it is a bit long in the tooth now.
I'm thinking of going for a 1x11 conversion, but not sure what id need.
Anyone know of groupsets available that could be used for this?
Thanks

[whitestone]

Any derailleur and cassette will do (the splines need to be compatible). You’ll need a new shifter as well plus might as well get new cable and outer. Unless the chainring is shot you shouldn’t need one of those.

[ootini]

Any derailleur and cassette will do (the splines need to be compatible). You’ll need a new shifter as well plus might as well get new cable and outer. Unless the chainring is shot you shouldn’t need one of those.

The current chain set is a Sram double. Is it possible just to remove the small ring? Or do I just leave it as is and remove the derailleur?

[whitestone]

I missed the 2x9 bit.

You might need to swap out the chainset to get a better chainline. That needs some digging around to find the offsets (from the centre line of the bike) of the current chainrings and what the ideal offset for a 1x should be. I'm used to Shimano with HT2 bottom bracket and it's a case of adding/removing shims from the drive side to move things outward/inward. You haven't said what BB is on the bike, if you are lucky you'll have HT2. If unlucky then Sram DUB, if the gods hate you then Sram GXP.

[fatbikephil]

Should be OK just using the 'big' ring mount. Only trouble will be limit on smallest ring size.
That said, when my mate went to 1x9 from 2x9 on his moonlander, he just removed the big ring, der and shifter! 22 - 11/36!

[voodoo_simon]

If it’s the SRAM X5 crank, then yes, just take both chainrings off and replace with a decent narrow/wide one (don’t get a cheapo off Amazon as they don’t fit - ask me how). I’ve used a race face one

[ootini]

If it’s the SRAM X5 crank, then yes, just take both chainrings off and replace with a decent narrow/wide one (don’t get a cheapo off Amazon as they don’t fit - ask me how). I’ve used a race face one

I'm pretty sure it's the Sram X5 but will need to check. I assume the new narrow wide ring would go in place of the existing small ring ?

[voodoo_simon]

Mine is in the inside of where the big ring was

[ootini]

Mine is in the inside of where the big ring was

Cheers