What WySync Fitment is

WySync Fitment is a Shopify app for stores whose products only fit some vehicles. It answers one question everywhere in the storefront — does this fit the vehicle I drive? — and it answers it the same way on every surface, from the homepage to the checkout button.

It does not care what the part is. Lift kits, brake kits, coilovers, light bars, tonneau covers, intakes, hitches, wipers, filters, wheels, tires — if the answer depends on the shopper's vehicle, it is the same problem, and WySync solves it the same way. Spec fields in the index are typed, not hard-coded, so blade length and hitch class behave exactly like diameter and offset do.

We started with wheels because wheel fitment is the hardest version of the problem in the aftermarket — five interacting measurements, none of them exact. Anything that handles that handles a direct-fit brake pad without breaking a sweat.

What it actually does#

Indexes your catalog

every product, variant, price, inventory level, collection and metafield, into a search index that belongs to your shop alone.

Resolves fitment

merges every source you connect into one set of vehicles per SKU.

Renders nine widgets

theme blocks that read one shared vehicle and answer for it.

Captures the vehicle on the order

so your warehouse and your support team see what the customer was buying for.

What it is not#

It is not a data subscription. The app indexes the fitment you have; it does not come pre-loaded with mappings for your catalog. If you don't have fitment data, connect a supplier feed — and if the category is wheels or tires specifically, the WySync Fitment Data add-on can judge your product specs against our curated data instead of needing mappings at all.

It is also not a theme. WySync never edits your theme's templates, never rewrites your navigation, and never takes over your design. The widgets are theme app extension blocks that you place, style and remove from Shopify's own theme editor.

Who it's for#

A store somewhere between $500K and $10M+ in annual revenue, selling parts that depend on the vehicle, where "will this fit?" is the most common pre-sale question and wrong-fitment returns cost real money — a lift kit, a brake kit or a set of four wheels is heavy freight in both directions plus a restock.

Common shapes: wheels and tires, suspension and lift, brakes and drivetrain, lighting and electrical, engine and exhaust, exterior and protection, towing, and high-volume service parts.

If your catalog is under a few hundred SKUs and you already list fitment in the product title, you probably don't need this. Say so on the contact form and we'll tell you the same thing.

The shape of the rest of these docs#