Not a fan of 3-by gears and front derailleurs on a mountain bike? Neither am I. I found a way to convert my Giant ATX 27.5 bike to 1-by on a budget with a mix of Shimano, SRAM, a decent budget crank and bottom bracket from Amazon, and some parts I already had.
I'm no expert or mechanic, just someone who likes to do his own wrenching, learn from others on youtube and share what I've learned.

Be sure to check out my Part 2 with my Riding Impressions:
   • 3x to 1x Drivetrain Conversion - Ridi...  
And Part 3 of this series where I go lower on the gearing and properly torque all bolts:
   • 3x to 1x Drivetrain Conversion Part 3...  

Parts purchased:
Shimano Deore 12-speed rear derailleur (new)
Shimano SLX 12-speed shifter (new)
SRAM X01 chain (new)
27.5" rear wheel and freehub (used)

Parts I already had:
SRAM PG-1230 12-speed 11-50 tooth cassette
Shimano MT-400 hydraulic brakes (only needed because the existing mechanical brakes handles were built into the old shifters)

Chapters:
0:00 Intro
0:14 My Bike
1:04 Gear Calculator Comparison
2:09 Parts Required
4:30 Cassette Install
7:45 Chain and Crank Removal
10:40 IXF Crank Install
14:49 Derailleur and Shifter Intall
21:52 Chain Install
29:26 Weight Before and After
30:38 Outro

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