How the tire size finder works
The tire size finder is a tab in the Hero with vehicle finder section. Shoppers pick three values:
| Field | Choices |
|---|---|
| Width | 185 to 335, in steps of 5 |
| Aspect ratio | 25 to 85, in steps of 5 |
| Rim | 14 to 26 |
Datum joins them into a size like 315/70R17 and shows matching tires.
Flotation sizes
Shoppers with larger off-road tires can switch the finder to Flotation. It then asks for:
| Field | Choices |
|---|---|
| Diameter | 28 to 44 in |
| Width | 8.50 to 16.50 in |
| Rim | 15 to 26 in |
Datum joins them into a size like 35x12.50R17.
Show the tire size tab
- In the theme editor, open the home page and click Hero with vehicle finder.
- Turn on Show tire size tab.
- To open the finder on this tab, set Tab shown first to Tire size.
- Click Save.
The Tread style has the tire size tab on, and shown first, by default.
Add tire sizes to your products
For the best results, store each tire's size in a metafield. The setting is Theme settings > Vehicle fitment > Tire size metafield (default custom.tire_sizes).
- In your Shopify admin, go to Settings > Metafields and metaobjects > Products.
- Click Add definition. Name it “Tire sizes” and check that the namespace and key is
custom.tire_sizes. - Choose Single line text, then List of values. Save.
- On each tire product, add its sizes, for example
315/70R17or35x12.50R17.
Write sizes exactly like 315/70R17 or 35x12.50R17 (lowercase x): no LT or P in front, no spaces, and no load index or speed rating at the end. The finder searches for that exact text.
Add the tire size filter
- Open the Shopify Search & Discovery app.
- Go to Filters and click Add filter.
- Choose your Tire sizes product metafield and save.
When a shopper clicks Find tires, Datum opens the all products collection, filtered to that size.
Without a metafield
If you clear the Tire size metafield setting, the finder uses your store search instead. It searches for the size text, like 315/70R17. Make sure the size is in each tire's title or tags so search can find it.
Sell tires in sets of 4
Use the Quantity selector block on the product page with preset buttons. See Quantity selector.
Tire size decoder section
The Tire size decoder section explains each part of a tire size, for example what 315, 70, R and 17 mean. It is for information only. It does not search.
- In the theme editor, click Add section and choose Tire size decoder.
- Set the Eyebrow and Heading.
- Add a Size part block for each part of the size. You can add up to 8.
| Size part setting | What it does |
|---|---|
| Code | The part of the size, for example 315. |
| Label | The name of the part, for example Width. |
| Meaning | A short explanation, for example 315 mm wide. |
Section settings: Color scheme, Top padding and Bottom padding.