Searches containing numbers?

Firstly, congratulations on a fab plugin, I use it religiously on most projects!

I’m building a Woocommerce site for a company that sells tyres and wheels, so the majority of searches are going to contain numerical measurements – things like:

20″ x 9″ alloy wheel
20″ x 9″ Wolfrace wheel
285/75/16 tyre
235/85/16 Cooper tyre

I’m not sure how relevanssi is treating the numerical values in these kind of searches though, because the most relevant products do not seem to come top of the search results at the moment.

Take this product – https://4x4tyres.chapterserver1.co.uk/product/23-x-9-5-hawke-halcyon-silver-et38/ the title is “23″ x 9.5″ Hawke Halcyon Silver ET38” but when I search for ’23″ Hawke’ or ’23″ Hawke wheel’ or even ’23 Hawke’ the product is nowhere near the top of the search results.

I’ve looked, but I can’t see any settings specifically relating to numercal searches so I’m not really sure if it can be improved?

Any help gratefully received!

Thanks

The page I need help with: [log in to see the link]