Will Shimano (Tiagra, 105) 9 speed Derailleurs work with Deore 8 speed shifters?

[Tony]

Will Shimano (Tiagra, 105) 9 speed ders work with Deore 8 speed shifters?
Can I use a double crank with triple 8 speed shifters and adjust the shifters for the double?
Thanks

[oldpotatoe]

Will Shimano (Tiagra, 105) 9 speed ders work with Deore 8 speed shifters?
Can I use a double crank with triple 8 speed shifters and adjust the shifters for the double?
Thanks

Yes and yes. If the LH shimano road shifter is a triple, it's also a double.

[Tony]

Yes and yes. If the LH shimano road shifter is a triple, it's also a double.

Thanks!