Wolftooth Tanpan 11

[Dexter-morgan]

6 hours ago, NGM said:

 

Those are the only two options I'm aware of if you want 105 STIs with 11 speed mtb casette. But I'm no expert. Shimano CUES does seem to be a step toward standardizing pull ratios.. I've also successfully played around with bar-end shifters to get an mtb groupset working with drop bars, but this is not for everyone. Some interesting reading (that includes the 2 shimano options you mention above):

https://bikepacking.com/gear/guide-to-mullet-drivetrains/

Given that you now have two 11spd mtb RDs, I suspect the tanpan option is cheaper? And it means you can at least make use of one of them. The 105 STI plus 11spd GRX RD would sort out your pull ratio issues but you MAY still need an RD extender (also wolftooth) on top of the GRX RD. Again though, I'm not an expert and haven't played around with any of the wolftooth stuff specifically. I have heard good things about the tanpan though.

Shimano GRX RX810 11speed | Front Derailleurs | Bike Hub

if you are interested.

[Mook]

4 hours ago, Dexter-morgan said:

Shimano GRX RX810 11speed | Front Derailleurs | Bike Hub

if you are interested.

Thx @Dexter-morgan, saw this ad. The RX810 is for 2x11 drivetrains with a max cassette cog of 36T.

 

[MORNE]

On 8/6/2025 at 8:31 PM, Mook said:

Thx @Dexter-morgan, saw this ad. The RX810 is for 2x11 drivetrains with a max cassette cog of 36T.

 

https://bikehub.co.za/classifieds/item/rear-derailleurs/829176/shimano-grx-rdrx812-derailleur

[Mook]

30 minutes ago, MORNE said:

https://bikehub.co.za/classifieds/item/rear-derailleurs/829176/shimano-grx-rdrx812-derailleur

Thx @MORNE