PartsWarehouse Classic
PartsWarehouse Classic is a BigCommerce theme by Lonestar Templates ($225). Tested on 2026-11-07 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 62 for mobile speed and 92 for desktop speed, 56/56 for SEO and 75/76 for accessibility (mobile/desktop, 0–100).
Mobile58

Desktop98

Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 62 | 92 |
| SEO | 56 | 56 |
| Accessibility | 75 | 76 |
| Best practices | 77 | 80 |
Single preset · measured 30 times since 2026-11-07 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — PartsWarehouse-Classic home page
Mobile
Speed 58 · 42 points to gain
- −22.5 Largest Contentful Paint medium effort
- −15 Cumulative Layout Shift medium effort
- −1.8 Total Blocking Time medium effort
- −1.7 Speed Index medium effort
- −0.8 First Contentful Paint medium effort
- 450 ms Reduce unused CSS high effort
- 300 ms Reduce unused JavaScript high effort
SEO 61 · 39 points to gain
- −31 Page is blocked from indexing low effort
- −7.7 Links are not crawlable medium effort
Accessibility 79 · 21 points to gain
- −4.2 `[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5. low effort
- −4.2 Select elements do not have associated label elements. medium effort
- −2.9 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −2.9 Links do not have a discernible name medium effort
- −2.9 Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). low effort
- −2.9 Touch targets do not have sufficient size or spacing. medium effort
Best practices 81 · 19 points to gain
- −19.2 Uses deprecated APIs medium effort
Desktop
Speed 98 · 2 points to gain
- −1.5 Largest Contentful Paint medium effort
- −0.6 Total Blocking Time medium effort
SEO 61 · 39 points to gain
- −31 Page is blocked from indexing low effort
- −7.7 Links are not crawlable medium effort
Accessibility 79 · 21 points to gain
- −4.2 `[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5. low effort
- −4.2 Select elements do not have associated label elements. medium effort
- −2.9 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −2.9 Links do not have a discernible name medium effort
- −2.9 Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). low effort
- −2.9 Touch targets do not have sufficient size or spacing. medium effort
Best practices 81 · 19 points to gain
- −19.2 Uses deprecated APIs medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| PartsWarehouse-Classic default demo ↗ | 62 | 56 | 75 | 92 | 56 | 76 | 2026-11-07 |
| category ↗ | 73 | 54 | 75 | 97 | 54 | 76 | 2026-11-07 |
| home ↗ | 58 | 61 | 79 | 98 | 61 | 79 | 2026-11-07 |
| product ↗ | 56 | 54 | 71 | 80 | 54 | 73 | 2026-11-07 |