Robinson calls these "Metric 48 pitch" but they really are the same size as Tamiya 0.6 module (Tamiya calls them AV pinions nowadays).
They are NOT 0.5 module and they are a lot bigger than imperial 48 pitch.
If you dig out your Tamiya pinions from your M-03, DF-02, TT-01, TB-01, TA-05 (stock), you will see what 0.6 module looks like.
DF-03 is 0.5 module. As far as I know DF-03 and Super Astute are the only cars with 0.5 module, so I don't think Robinson are going to make these pinions.
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