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I am buying a Sram Force 1 groupset with a new bike and I cannot test it before buying. In the case I really dislike the gearing steps issues, how difficult/costly would it be to convert to Sram Force 22 which has two chainrings?

  • May be impossible - totally depends if your frame can take a front mech or not, either with a mounting in the right place or by using a band-on front mech which requires a round seat tube and clearances. – Criggie Nov 18 '18 at 0:57
  • Yes in my case the frame is ready for a front mech – Antonin Cezard Nov 18 '18 at 1:20
  • Unless you live far from a bike shop, find a supplier who'll let you try before you buy. – David Richerby Nov 18 '18 at 11:25
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Obviously you will be looking at a new crank, front derailleur and left hand shifter; and possibly a cassette.

I think you'll be OK running the Force 1 rear derailleur with double chainrings, unless you are getting a long cage version, in which case the minimum cassette size is 11-36 (source). If you want a narrower cassette - which your question implies - you'd want a mid or short cage that support 11-25 and 11-28.

You are looking at considerable cost - half a groupset. Cranks are easy to swap, left shifter not too hard - but you'll need a brake bleed for the front brake which is a pain. Front derailleur is not too bad (make sure the bike comes with front derailleur mounting options!) It does all add up to a significant effort though.

I see questions on this site about buying a bike then swapping out some big chunk of it from time to time. My advice is buy the bike that you want in the first place!. I'd at least try to get a test ride on a SRAM 1x bike before committing.

  • Yes you're right I guess even the driver body must be changed (sram xd if 10-42 cassette). Should be an expensive endeavour. I'm interested by the 1x perks but would be best to try it beforehand indeed – Antonin Cezard Nov 18 '18 at 1:18
  • He won't need a new crank, just a 2x spider and a pair of chainrings. – Klaster_1 Nov 18 '18 at 1:35
  • Also, Force 1 RD is 1x only because it's X-Horizon, see here. – Klaster_1 Nov 18 '18 at 6:09
  • @Klaster_1 Thanks for the extra info - I was suspicious that the RD would not work but could not see a reason why on my initial look at the specs – Argenti Apparatus Nov 18 '18 at 13:35

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