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I was thinking of using a FC-M8000-2 crankset (probably 38/28 or 36/26).
I've done something similar, swapping out a 50/34 for an old Ultegra triple with the outer ring taken off, giving 42/30 on my Genesis CdA (Claris shifters and mechs). It's worked fine. A couple of friends have fitted XT chainsets (40/28) to both 9 speed Tiagra and 11 speed 105 set ups, without changing their front mechs either.
Bearlegged-
That's what I'd like to do as well, 38/26 XT on the front, with 11-32 at the back. @RichE73 I have a braze on FD, so I believe I can lower to suit it. Chainline should be roughly the same I am guessing. Probably need to remove some chain links.
On the other hand, if I keep the 50/34 crankset, and want a bigger sprocket at the back, I need the tanpan, wolftooth goatlink, mtb cassette, spacer, mtb rd, longer chain.
I think pricewise it's more or less there.
Option 1 (front drivetrain): 32/26=1.231
Option 2 (rear drivetrain): 40/34=1.176
giofox
Hi,
I need to gear down as much as possible for a project later this year, so I am considering all the options, trying to minimise the number of parts to swap from current setup which is:
ST-5800 shifters
FD-5800 front mech
RD-5800 long cage
CS-5800 11-28 cassette
FC-5800 compact 50/34 cranks
The lowest gear being 34-28 at the moment.
I can easily change the cassette up to a 11-32 with the same derailleur. This is not going to be enough though (many long gravel climbs). I would like to keep the double gearing option, and at the same time avoid going for something expensive.
I was thinking of using a FC-M8000-2 crankset (probably 38/28 or 36/26).
This means either using the same FD or eventually changing it to a FD-M8025.
Does anyone know about FC-M8000 to FD-5800 compatibility? What about FD-M8025 to ST-5800 I would expect the same pull ratios more or less.
Cheers