O.L.D. = Over-Lock-nut Dimension as in the width of the rear axle.yeah, 142x12 is not that old. the rear axle is non boost. you could run a boosted fork if you really wanted. But crank and wheels should be non boost.
the rear wheel is DT Swiss M 1900 Rear Wheel 30mm Rim 12x 142mm Sram XD so i think it has a dt 370 hub , The parts are 12 speed Nx Eagle crank derailleur , gx cassette,O.L.D. = Over-Lock-nut Dimension as in the width of the rear axle.
OP, some rear hubs can be converted to boost spacing and others cannot. I just did it to my Hope Pro4 hub. What rear hub are you wanting to use?
Also, some people prefer non-boost cranks on boost frames to move the chainline inboard (closer to the center of the frame) to bias it toward lower gears. If the frame can fit it without hitting the chainrings it's worth a shot.
Yes, you just need spacers for the wheel. Search eBay and put in the different widths. You'll see.My friend got a used bike frame and it has a hub spacing 148x12mm O.L.D , we want to know if we can used all non boosted bike parts from his old bike ? and 12x142mm rear Wheel?