How do you raise the metro to make it sit higher off the floor? Is it adjustable

This mnaual wheelchair has dual position rear axles and caster forks to allow seat to floor height changes with no additional components. What this means is that the wheelchair is adjustable in height based upon the position of the front caster wheel axles and rear wheel axles. Raising the axles lowers the chair. Lowering the axle postion raises the chair. If the rear axles of the rear wheels are in the top position you can lower the wheels and raise the chair. Likewise, if the caster axles of the front wheels are in the top hole of the fork then put the wheels and axles in the lower hole to raise the chair. It is easy to accomplish this with basic tools.
If the front and rear wheels are already in the lower holes (the chair is in its highest position) you have another option. This option is a more expensive way to raise the chair by buying 4 new wheels. Lets say for example you have 24" diameter rear wheels. If you purchase new 26" diameter wheels you will raise the chair 1". If you have 6" casters and put on 8" casters this raises the chair 1" in the front. Hope this helps.