Auto Parts & Tires: ROAS 920% in Peak Season

Client Overview

Two retail auto parts and tire stores faced the same brutal seasonal pattern: the tire-replacement season lasts only 3-4 weeks, during which the auction overheats as market giants pile in and click prices jump 3-5x almost overnight. Winning required reallocating budget faster than competitors could react.

Over one peak season, the account generated €154,373 in revenue from a €16,779 advertising budget — an average 920% ROAS (peaking at 1,250%), 3,480 orders at an average €4.82 CPA, reaching 115% of the sales plan.

Strategy

• Dynamic feed segmentation — inventory split into Winter, Summer, and All-Season categories so budget could be reallocated within a single day as seasonal demand shifted.
• Hybrid campaign structure — Performance Max for visual placements and retargeting, paired with Search campaigns targeting precise size queries (e.g. “buy 205/55 r16 winter”).
• Competitor audience targeting — custom audiences built from competitor site visitors and specific vehicle-brand searches to reach purchase-ready shoppers.
• Automated stock management — hourly inventory checks automatically paused ads for out-of-stock items or incomplete sets (fewer than 4 units).
• Best-seller scaling — weekly performance reviews identified top products and removed budget caps on items where ROAS exceeded 900%.

Implementation

The product feed was rebuilt around seasonal categories (Winter / Summer / All-Season) so that as soon as demand signals shifted, budget could move to the right segment without rebuilding campaigns from scratch. Search campaigns were built around exact tire-size queries — the highest-intent searches in this category — while Performance Max picked up broader visual and retargeting reach.

Inventory scripts ran hourly, automatically pausing ads for products that fell out of stock or dropped below a complete set (4 units), preventing wasted spend on unfulfillable orders during the highest-traffic weeks of the year.

Results

Metric	Result
Advertising budget	€16,779
Revenue	€154,373
Total orders	3,480
Average CPA	€4.82
Average ROAS	920%
Peak ROAS	1,250%
Sales plan achievement	115%

The combination of dynamic segmentation and hourly stock automation meant the account could scale aggressively during the short seasonal window without overspending on out-of-stock or low-margin products.