Use MT ZOOM boost thru axle hub adaptors/conversion kit to use standard width wheels in boost frames & forks. 

Front 15mm 100mm to 110mm fork 
Use standard (100mm) axle/hub spaced wheels in a boost fork with these adaptors.
The wheel is then mounted and secured with your 15mm x 110mm thru axle.
Converts 100mm axle wheels to 110mm “spaced” fork legs.
Includes: 2 x 5mm spacers, long 6 x stainless steel rotor bolts, 1 x adapter.
Weight: Only 10g (without bolts).

Rear 12mm 142mm to 148mm frame
Use standard (142mm) axle/hub spaced wheels in a boost frame with these adaptors.
The wheel is then mounted and secured with your 12mm x 148mm thru axle.
Converts 142mm axle wheels to 148mm “spaced” frames.
Includes: 2 x 3mm spacers, Long 6 x stainless steel rotor bolts, 1 x adapter.
Weight: Only 6g (without bolts).

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Material: Lightweight CNC alloy 6061

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Installation instructions. 
1. Bolt your disc & with the adaptor to your wheel using the long rotor bolts supplied (this won’t work with centre lock/splined hubs of course).
2. Place the spacer either of the hub on the thru axle.