Two versions of these wheels

Ones for the early generation nitro with the thinner ,straight fork

Other

For the later generation, it's the thicker, curved fork

Please state which one you require or even better upload a pic of your existing nitro so we can verify compatibility

Left and right are different, so we will need to know which side you require as if you  were  standing behind the rollator

These will only work with the NITRO RANGE not other generic models