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Why don’t you just get the same mech and keep everything else as it is?
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Shimano Di2 12-speed is what they term a semi-wireless groupset. Basically the shifters have their own battery each, then the front and rear derailleur is powered by a battery that they are attached to by wires. There is no compatibility between 11 and 12 speed.
SRAM remains completely wireless, but is also 12 speed. You might be able to pick up an 11 speed groupset, but they are becoming increasingly harder to find.
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I think you can still get hold of the 11sp Red etap derailleurs, but they will cost a fortune. You could buy a 2nd hand one that may or may not break immediately, or a new one for £500+. I think the problem with that investment is that you will be struggling to get replacements if other components break (I think they are only still selling the derailleurs new).
I think you can probably buy some previous generation 12sp AXS rim brake Force/Red shifters new still that you could pair up with 12sp derailleurs - probably the cheapest and most future proof option?
It's a pain tbh - I wanted to put wireless onto one of my rim brake bikes, but didn't fancy the cost/risk of 11sp etap.
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after eight faithful years service my etap 11 speed rear mech appears to have died.
Nothing to lose by having a squiz inside it. You never know, there's a bee's dick of a chance it's fixable.
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andyp
keepit
Kimmo
@TTM
So after eight faithful years service my etap 11 speed rear mech appears to have died.
Assuming nothing miraculous happens and it suddenly comes to life, I have a decision to make about getting my good bike back on the road.
I want fully wireless shifting as the frame is old and has no internal routing for wires, so does that mean I’m looking at Sram again? Or is shimano on the table?
It’s a rim brake frame and I have brake callipers and a power meter chainset, so I don’t need a full groupset.
Also, I’d prefer to stay 11 speed if I can as I have another bike running 11 speed and have various chains and cassettes that are all 11 speed, but if I have to move to 12 speed then I’ll suck it up.
I’m completely out of touch with groupsets so any advice would be appreciated.