Switching to 1x10 drive chain system

Eran.lenga
Eran.lenga Posts: 3
edited January 2019 in MTB workshop & tech
hi.
i have MTB with a 3x10 system and i want to switch to 1x10. sifter shimano deor 10 speed.
i have a rear shimano deor derailleur.
Shimano deor RD-M615

can i use it with front 30T chain ring & 42-11 Cassette? Do i need hanger extension?

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