Wheel and Tire Distributor Ecommerce Where Every Package Fits

A wheel and tire package is five order lines that have to agree. The buyer sees one price for a set of four. You see a wheel SKU, a tire SKU, four sensors, a lug kit, maybe a set of hub-centric rings, and a mount-and-balance labor line. Each one has its own fitment rule, and any one of them being wrong sends the whole set back. A conical-seat lug nut on a ball-seat wheel is not a small mistake. Neither is a sensor programmed for the wrong vehicle.

Wheel fitment runs on measurements, not applications. A vehicle selector tells you the car. Whether a wheel goes on it depends on bolt pattern, center bore, offset and backspacing, and on whether the bore is hub-centric or needs a ring to center it. Staggered fitments split the set into a front size and a rear size. Plus-sizing moves up in wheel diameter and down in sidewall to keep the overall diameter close to original. None of that lives in a part number field.

The tire comes with federal paperwork the wheel never does. Every new tire carries a DOT Tire Identification Number, and under 49 CFR Part 574 the four-symbol date code at its end gives the week and year of manufacture. The same part puts registration on the distributor or dealer that sells a new tire to a tire purchaser: a registration form with the full TIN recorded, or the purchaser's details and TIN sent to the manufacturer within 30 days. A tire purchaser is someone buying "for purposes other than resale". Sell a set straight to a fleet, and that obligation is yours rather than your dealer's.

The tax depends on the load rating, and the fee depends on the state. Federal excise tax under 26 U.S.C. 4071 falls on taxable tires sold by the manufacturer, producer or importer. The rate is 9.45 cents for each 10 pounds of maximum rated load capacity above 3,500 pounds, or 4.725 cents for a biasply or super single tire. Two tires at the same price can carry different tax. A tire rated at 3,500 pounds or less carries none. If you import, you are the importer the statute names. State fees sit on top: California's tire fee applies to consumers for each new tire purchased and is generally collected by the retailer at the time of sale. So the checkout has to know the ship-to before it can price the set.

TPMS turns most packages into a service job. FMVSS 138 covers tire pressure monitoring on cars, trucks, buses and multipurpose passenger vehicles rated at 10,000 pounds GVWR or less. Vehicles with dual wheels on an axle are excluded. A package for a vehicle built under the standard needs sensors matched to that vehicle, service kits for the valve stems, and a relearn after the install. A dually on a fleet account falls outside it. Your catalog has to know which is which.

Dealers, installers and fleets buy the same tire three different ways. The independent dealer wants it on tomorrow's truck at its program tier. The installer wants the set mounted, balanced and shipped ready to bolt on. The fleet buys by unit and vehicle type on a national account price, and much of what it buys is heavy truck tires carrying FET. One catalog, three checkouts, and regional warehouses deciding which building ships a matched set of four.

The build has one job: make the package one thing that knows the vehicle, the buyer and the ship-to.

Vehicle first, then the wheel's measurements. Uncap Garage is a Year-Make-Model fitment app for Shopify, powered by ACES and PIES, the auto care industry's standards for vehicle fitment data and product information. The buyer saves the vehicle once and the catalog filters to parts that fit it. The wheel attributes behind that vehicle are loaded from your fitment data and mapped during implementation: bolt pattern, center bore, offset range, ring requirement, and staggered front and rear sizes. Garage gets the buyer to the vehicle. The wheel data decides what bolts on.

The package rules, built on the quoting workflow. Uncap Quotes runs the configure, price, quote workflow inside the Shopify admin, with each account's negotiated prices, tiers and volume breaks applied automatically. The package rules are built during implementation on top of it: every component fits the same vehicle, lug seat matches the wheel, sensors match the vehicle, and FET and state fees land on the right lines. So is the storefront package builder that walks a dealer from vehicle to finished set. For fleet and program deals, Quotes routes exceptions to the right approver, keeps validity windows and a full revision history, and turns an approved quote into a Shopify order in one click.

Mount and balance sold as a service, not a note on the order. Uncap Portal sells services and rentals alongside products, through one checkout. Mounting, balancing and sensor programming sit beside the tires as real line items. Each buyer sees its own assortment and pricing. The fleet that buys the same steer tire every quarter has its reorder list and order history a click away, with net terms, invoices and payments in the same portal.

FET, state fees and the TIN on the invoice. FET by load capacity, state fees by ship-to, and TIN and date code capture on the order and invoice are configured during implementation. Where your ERP already calculates FET, that is the figure the storefront shows. Uncap Connect syncs customer-specific pricing, credit terms and tax rules between Shopify and the ERP in real time, in both directions, with no separate middleware platform to maintain. For fleet sales, where you are the one registering, getting the TIN from the pick to the manufacturer is scoped as its own build item.

The case against Shopify for this trade, answered. The objection you will hear is that Shopify becomes a stack of apps, each owning a slice of the package. That fairly describes a bad build. In this one, fitment runs in Uncap Garage and quoting in Uncap Quotes, both inside Shopify. Uncap Connect is embedded in Shopify too, not a separate platform that sits between systems. The rules that make a package valid, and the tax and fee logic, are built once against the company accounts and catalogs a dealer or fleet buys through. So the tier and the contract price apply to the package, not only its parts. Any claim that a platform does all of this out of the box deserves a demo with your vehicles and your fee table.

Proof, at its true distance. There is no published Uncap wheel and tire build. The nearest published work is adjacent: automotive fitment. Kooks, a 60-year performance automotive manufacturer, runs ACES year, make, model and engine fitment search. Infor Visual ERP and a PDM Automotive PIM feed real-time inventory, and wholesale buyers get secure portals with custom pricing. Its published results are 22% higher conversion and 38% lower total cost of ownership. E3 Spark Plugs runs a Year-Make-Model tool, a cross-reference application for competitor SKUs, and group pricing for dealers. Vehicle fitment and dealer pricing, yes. Wheel and tire packages, not yet.

Vehicle selector with wheel data behind it. Year-Make-Model selection in Uncap Garage, with wheel measurements mapped to each vehicle.

Staggered and plus-size sets. Front and rear sizes sold as one staggered package, and plus-size options limited to what your fitment data allows for that vehicle.

One price for the whole set. Wheel, tire, sensors, lug kit, rings and labor priced as one package, with the package rules built during implementation.

Hardware that follows the wheel. Lug seat and thread matched to wheel and vehicle, and ring size set by the gap between wheel bore and hub.

TPMS by vehicle. Sensors and service kits matched to vehicles built under FMVSS 138, a relearn flagged on the install, and dual-wheel commercial vehicles handled without them.

FET and state fee lines. Excise tax from maximum rated load capacity and state tire fees by ship-to, each on its own invoice line.

TIN and date code on the order. The DOT date code shown when a buyer asks how old the stock is, and the full TIN captured on fleet sales.

Mount and balance as a service line. Labor ordered next to the product, priced by account, shipped with the set.

Dealer, installer and fleet pricing. Each buyer sees its own assortment and pricing, kept in step with the ERP. Minimum order quantities are configured during implementation.

Fitment is a shipped product. Uncap Garage is a Shopify app built on ACES and PIES. The vehicle layer is configured, and only the wheel measurements on top get scoped.

The build line is drawn in the open. Package rules, FET, state fees and TIN capture are implementation work. You see them in the scope and the price, not in week six.

A long record on the platform. Uncap is a Shopify Platinum Partner, on Shopify since 2013, with 380+ unified storefronts launched on Shopify.

Scoped before it is built. The Uncap Blueprint is a flat-fee engagement that maps your fitment data, package rules, fee logic, pricing tiers and ERP integration before any build begins. The deliverables are yours to keep, and the fee is credited toward implementation if you build with Uncap.

This page sits under Auto Parts and Aftermarket, which covers part-number catalogs, jobber tiers and core charges. This page covers the package, the wheel measurements and the tire's tax and paperwork. Sideways, Performance Parts covers the enthusiast upgrade catalog and Powersports covers the dealer network behind off-road and on-road machines. For fitment apps on Shopify, see the Uncap roundup of Year, Make, Model fitment apps for automotive. On the ERP side, Epicor Vision is Epicor's ERP for parts distribution, and the full ERP integrations list shows every system Uncap connects.

Bring your wheel fitment export and one fleet invoice that shows FET. Between them they hold the vehicle data and the tax line this build has to get right.

Book a strategy session with Uncap, or start with a Blueprint if what you need first is the package and fee logic written down and costed.