wof...FWIW, Easton told me it's testing sub-compact chainrings (e.g. 48/46/32/30). Probably 1Q 2018.
Lelandjt, all interesting. However measuring chainline using 12*142 rear drop/ cassette spacing it is obvious it is off.
My chain jumps at small chainring at what seems to be around 1-3 o'clock.
The big three, Shimano, Sram and Campa does not oversee this.
Sram made 1*11 which i personally suspect is because they have seen the issue.
With 1*11 it's not, especially with a clutch RD.
Shimano have ignored this and constantly hinders users from mixing mtb and road groupsets.
Campa is not known to be used for cx/ gravel. Even so, Campa now released H11 crankset for disc brake road bikes.
This crankset have a wider chainline.
The 1*11 WT chainring is offering an outboard chainline. Like riding on large on a 2*11.
My last attempt to solve this is Easton EC90SL crankarms+axle, a custom CNC spider from Kent Eriksen and chainring combo 44/34 from Wickwerks.
My FD holder is lowered with an adapter, for FD to be positioned for 44 or 46T large chainring.
I also modified the FD cage to be lower in height, to position itself better for 44 or 46 large chainring.
It also comes down deeper, so it moves the small chainring better than a standard FD.
With the new crank+spider, i should get a chainline of 46-47mm.
This is probably the only avaible solution right now.
Rotor Aldu 3D+ is made to used either an axle allowing 43.5mm chainline for rim brake bakes (130mm rear drop out and normal cassette spacing)
Or, you buy the longer axle and get 46mm chainline for disc brake bikes with 12*142 rear drop out.
But Aldhu still will not be available with smaller chainrings.
Perhaps it'll come in due time.
Look at FSA SLK or K-Force Adventure cranks. They offer 48/32 or 46/30 chainrings, but chainline is still to small at only 44.5mm.
So, i believe 1*11 is partly made because you run less risk of chainsuck or chain jumping.
No road groupset is really designed for a more outboard chainline, but i guess they should be, if designed to be optimized for 2*11 gravel.
Especially the FD and the cranksets chainline.
Thing is, both cx and gravel is a niche market so Shimano probably don't invest money into this.
But i am dead sure they know very well that people try to solve this.
But there is no big money involved like with road bikes or mtbs.
I mean, look at road bikes, people always want to ride what the pro team riders use.
Where is this talking cx/ gravel? Ofcourse they boost 1*11.
But i ask, how can this be a progress?
You'd want a more linear ratio when shifting and less friction.
This is progress. Not a more crude ratio and skipping an FD.
For me, this is marketing hype. Sure, it's great that people can chose to use it.
But 11 gear, in the 90is we had what, 27, then 22. Now progress is using 11?
Who spins out a 50/34 using either 700*38-40 or even worse, 650*45-52mm?
You'd want smaller chainrings if you run 2*11.