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tso.co website review

Visit site (opens in a new tab)Reviewed 10 November 202634 issues · 86 checks

This review found 34 issues worth fixing on tso.co, 8 of them high impact, across 86 checks. The most urgent: reduce unused JavaScript. Your full playbook turns these into prioritised fixes alongside reviews, competitors and channels.

  1. Homepage
  2. Phone render
  3. Links and pages
  4. Google PageSpeed

Google PageSpeed Insights (opens in a new tab), mobile

Real-visitor load time (LCP)75th percentile, phones
1.8 s1.3 sMay 23Nov 71.5 s
Show as table
DateReal-visitor load time (LCP)
May 23, 20261.3 s
May 30, 20261.3 s
Jun 6, 20261.3 s
Jun 13, 20261.4 s
Jun 20, 20261.5 s
Jun 27, 20261.7 s
Jul 4, 20261.7 s
Jul 11, 20261.7 s
Jul 18, 20261.7 s
Jul 25, 20261.5 s
Aug 1, 20261.5 s
Aug 8, 20261.5 s
Aug 15, 20261.4 s
Aug 22, 20261.4 s
Aug 29, 20261.5 s
Sep 5, 20261.5 s
Sep 12, 20261.6 s
Sep 19, 20261.6 s
Sep 26, 20261.6 s
Oct 3, 20261.5 s
Oct 10, 20261.5 s
Oct 17, 20261.5 s
Oct 24, 20261.4 s
Oct 31, 20261.5 s
Nov 7, 20261.5 s
Real-visitor tap response (INP)75th percentile, phones
167 ms124 msMay 23Nov 7162 ms
Show as table
DateReal-visitor tap response (INP)
May 23, 2026129 ms
May 30, 2026129 ms
Jun 6, 2026135 ms
Jun 13, 2026136 ms
Jun 20, 2026137 ms
Jun 27, 2026137 ms
Jul 4, 2026131 ms
Jul 11, 2026135 ms
Jul 18, 2026131 ms
Jul 25, 2026129 ms
Aug 1, 2026130 ms
Aug 8, 2026130 ms
Aug 15, 2026131 ms
Aug 22, 2026137 ms
Aug 29, 2026143 ms
Sep 5, 2026146 ms
Sep 12, 2026154 ms
Sep 19, 2026161 ms
Sep 26, 2026154 ms
Oct 3, 2026162 ms
Oct 10, 2026162 ms
Oct 17, 2026162 ms
Oct 24, 2026162 ms
Oct 31, 2026162 ms
Nov 7, 2026162 ms

Chrome UX Report (opens in a new tab): real Chrome visitors over rolling 28-day periods.

One score from every part of this review. How it works

Full-page screenshot of tso.co (phone) rendered by Google PageSpeed Insights

How it loaded on a phone

  1. tso.co at 0.4 s0.4 s
  2. tso.co at 0.8 s0.8 s
  3. tso.co at 1.1 s1.1 s
  4. tso.co at 1.5 s1.5 s
  5. tso.co at 1.9 s1.9 s
  6. tso.co at 2.3 s2.3 s
  7. tso.co at 2.6 s2.6 s
  8. tso.co at 3.0 s3.0 s

Speed

10 to fix60
  • Reduce unused JavaScript

    3.1 s · 660 KiB

    About 660 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 3.1 s faster on a phone.

  • Improve image delivery

    650 ms · 783 KiB

    12 images could be 783 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 650 ms faster on a phone.

  • Mobile performance score: 60

    60/100

    Your mobile performance score is 60. Pages that score under 90 lose visitors before the first paint.

  • 8 third-party services on the page

    8 third-party services load with your homepage (Google Tag Manager, Affirm and Klaviyo and others), adding 2.2 MB and 761 ms of main-thread time.

  • Use efficient cache lifetimes

    750 ms · 196 KiB

    9 files are served with short cache lifetimes, so returning visitors download them again (196 KiB).

  • Google Tag Manager adds 314 ms

    314 ms

    Google Tag Manager costs a phone 314 ms of main-thread work and 550 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

  • Main-thread work: 2.7 s

    A phone's processor spends 2.7 s on main-thread work while loading, 1.5 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

  • Klaviyo adds 118 ms

    118 ms

    Klaviyo costs a phone 118 ms of main-thread work and 1.1 MB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

  • 2,004 HTML elements

    The page has 2,004 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

  • Shopify adds 47 ms

    47 ms

    Shopify costs a phone 47 ms of main-thread work and 363 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

  • 7 long tasks on the main thread

    7 long tasks block the main thread while loading, the longest for 249 ms. During a long task the page ignores taps.

  • Render-blocking requests

    100 ms

    10 files block the first paint until they finish downloading. Deferring or inlining them could save about 100 ms.

  • Reduce unused CSS

    50 ms · 10 KiB

    About 10 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 50 ms faster on a phone.

  • Legacy JavaScript

    25 KiB

    Polyfills for old browsers add 25 KiB JavaScript that modern phones do not need.

  • Minify CSS

    7 KiB

    7 KiB could be saved by minifying CSS.

  • Chained critical requests

    Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

  • Forced reflow

    Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

  • Minify JavaScript

    4 KiB

    4 KiB could be saved by minifying JavaScript.

1 checks passed
  • Server response: 16 ms

    16 ms

    Your server sent the HTML in 16 ms, well inside Google's 600 ms guideline.

Core Web Vitals

6 to fix100
  • Largest Contentful Paint: 17.6 s

    17.6 s

    Your largest element takes 17.6 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “Avalanche Grey 2026 Ford F250 on a 8" TSO Mini Cradle 4 Lin…”.

  • Time to Interactive: 18.7 s

    18.7 s

    The page becomes fully interactive after 18.7 s. Good is under 3.8 s.

  • Speed Index: 8.8 s

    8.8 s

    Visually, the page fills in at 8.8 s (Speed Index). Good is under 3.4 s.

  • Tap response (INP) got 26% slower for real visitors

    +26%

    Over the last 25 four-week periods to 2026-11-07, real Chrome visitors' tap response (inp) went from 129 ms to 162 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

  • First Contentful Paint: 2.1 s

    2.1 s

    The first text or image appears after 2.1 s on a phone. Good is under 1.8 s.

  • Total Blocking Time: 256 ms

    256 ms

    Scripts block taps and scrolling for 256 ms in total while the page loads. Good is under 200 ms.

  • Largest content (LCP) got 10% slower for real visitors

    +10%

    Over the last 25 four-week periods to 2026-11-07, real Chrome visitors' largest content (lcp) went from 1.3 s to 1.5 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

7 checks passed
  • Passes Core Web Vitals for real visitors

    Real Chrome users on phones pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)).

  • Real-user LCP: 1.2 s

    1.2 s

    Real visitors wait 1.2 s for the largest content to appear (75th percentile). Good is under 2.5 s.

  • Real-user INP: 121 ms

    121 ms

    Real visitors wait 121 ms for the page to respond to a tap (75th percentile). Good is under 200 ms.

  • Real-user CLS: 0.00

    0.00

    For real visitors the layout shifts by 0.00 (75th percentile). Good is under 0.1.

  • Real-user FCP: 1.0 s

    1.0 s

    Real visitors see the first content after 1.0 s (75th percentile). Good is under 1.8 s.

  • Real-user TTFB: 360 ms

    360 ms

    Real visitors wait 360 ms for your server to start answering (75th percentile). Good is under 800 ms.

  • Cumulative Layout Shift: 0

    0

    The layout barely moves while loading (CLS 0, good is under 0.1).

Images and page weight

4 to fix43
  • Page weight: 4.5 MB in 282 requests

    4.5 MB

    Your homepage downloads 4.5 MB in 282 requests on a phone: images 1.6 MB (21), scripts 1.6 MB (98) and other files 958 KiB (125). Under 2 MB keeps phones on slow connections fast.

  • 8 images in older formats

    8 images (770 KiB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

  • 8 images below the first screen load straight away

    8 images further down the page (770 KiB) download before anyone scrolls to them. Adding loading="lazy" lets the first screen load first.

  • 1 image far larger than shown

    133 KiB

    1 image is downloaded at several times the size a phone draws it, for example IMG_6482.jpg at 1,000 px wide, shown at 175 px. Resized copies would save about 133 KiB.

  • About 1.3 g of CO₂ per visit

    1.27 g

    By the Sustainable Web Design model, a visit to your homepage emits about 1.27 g of CO₂e: 152.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

Accessibility

4 to fixGoogle 9795
  • 12 text elements with low contrast

    12 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

  • Scrollable region must have keyboard access (1 element)

    Scrollable region must have keyboard access: 1 element on the page fails this check, rated serious by axe-core.

  • All page content should be contained by landmarks (3 elements)

    All page content should be contained by landmarks: 3 elements on the page fail this check, rated moderate by axe-core.

  • ARIA role should be appropriate for the element (1 element)

    ARIA role should be appropriate for the element: 1 element on the page fails this check, rated minor by axe-core.

  • Elements with visible text labels do not have matching accessible names.

    Elements with visible text labels do not have matching accessible names. (1 element).

2 checks passed
  • Every image has alt text

    All 12 images in the HTML carry an alt attribute.

  • 56 automated accessibility rules passed

    axe-core 4.13.0, the open-source engine behind most accessibility testing tools, ran 60 WCAG 2.2 A/AA and best-practice rules on the phone render: 56 passed and 4 failed. 3 mores need a person to judge. Automated rules catch about a third of accessibility problems; the rest need manual testing.

SEO

3 to fixGoogle 9286
  • Title is short (17 characters)

    Your title is only 17 characters: “TSO Manufacturing”. Between 30 and 65 characters leaves room to say what you do and for whom.

  • Meta description is short (62 characters)

    Your meta description is only 62 characters: “We're making customization accessible to the everyday builder.”. 70 to 160 characters is enough to sell the click.

  • 2 links crawlers can't follow

    2 links have no real href, so search engines can't follow them.

  • 70 internal links, 11 external

    The homepage links to 70 pages on tso.co and 11 external pages.

6 checks passed
  • One H1 headline

    Your main headline reads: “Love What You Drive.”.

  • Canonical URL set

    The canonical URL is https://tso.co/.

  • Structured data in place

    Structured data found: AutoPartsStore and WebSite.

  • Open Graph tags complete

    Open Graph tags are complete, so shared links show a title, description and image.

  • robots.txt in place

    robots.txt is in place and points crawlers to your sitemap.

  • XML sitemap found

    Your XML sitemap is reachable at https://tso.co/sitemap.xml.

AI search readiness

1 to fix88
  • No Organization structured data

    There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

3 checks passed
  • AI answer engines may read the site

    Your robots.txt lets the crawlers behind ChatGPT search, Claude and Perplexity read the site and cite it in answers.

  • Text is in the HTML

    Your server sends the page's text in the HTML (3,025 words), so crawlers that don't run JavaScript still read it.

  • llms.txt published

    The site publishes https://tso.co/llms.txt (6 KiB, 8 links), a plain-text guide to the site for AI tools.

Other pages

4 to fix68
  • 1 page without a title

    https://tso.co/customer_authentication/redirect has no <title>, so Google invents the link text in results.

  • 1 linked page hidden from search

    https://tso.co/customer_authentication/redirect is marked noindex but linked from your homepage. If it is meant to be found, remove the noindex.

  • 11 pages without a meta description

    https://tso.co/customer_authentication/redirect, https://tso.co/collections/suspension, https://tso.co/collections/frame-overlays, https://tso.co/collections/traction-bars, https://tso.co/collections/mud-flaps and https://tso.co/collections/emblems and 5 others have no meta description, so Google writes the search snippet from whatever text it finds.

  • 2 pages without an H1

    https://tso.co/customer_authentication/redirect and https://tso.co/pages/tso-about-us have no <h1> headline, so visitors and search engines get no clear main topic.

  • 15 internal pages checked

    We fetched 15 pages linked from your homepage (of 29 found) and read each the way a search engine does.

3 checks passed
  • Linked pages load

    All 15 pages we checked loaded without an error.

  • Canonical URLs point to themselves

    No page we checked hands its ranking to a different URL.

  • Titles are unique

    Every page we checked has its own title.

Best practices

Google 96100
3 checks passed
  • No console errors

    No JavaScript errors were logged while the page loaded on a phone.

  • Tap targets are thumb-sized

    54 of 57 tappable elements near the top are at least 24 px.

  • Mobile viewport set

    The page declares a mobile viewport.

Content and conversion

1 to fix94
  • Local business without LocalBusiness data

    Your homepage shows a street address but no LocalBusiness JSON-LD, so Google and AI assistants have to guess your address, hours and phone from the page text.

  • No map or directions link

    There is no link to Google or Apple Maps. A directions link is one tap for a phone visitor.

  • No risk reducer

    No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

  • About 1,029 words of copy

    The homepage carries about 1,029 words of visible text.

8 checks passed
  • Clear next step on the first screen

    On a phone, the first screen shows a clear next step: “Call (423) 524-9311” and “or talk to a builder · (423) 524-9311 →”.

  • 14 calls to action

    The homepage has 14 calls to action, for example “Shop by Vehicle”, “Shop by Category” and “Shop All”.

  • 6 short forms

    6 short forms (1 field at most) are right on the homepage.

  • Social proof on the page

    Social proof on the homepage: 1 customer or partner logo, a star rating and “Over 35,000+ Customers”.

  • Analytics in place

    Analytics detected: Google Tag Manager and Google Analytics.

  • Direct contact links

    Visitors can reach you directly: 3 phone links and 0 email links.

  • Opening hours shown

    Your opening hours are on the homepage.

  • Phone number on the homepage

    Your phone number is on the homepage as a tap-to-call link.

Privacy and tracking

1 to fix
  • 6 trackers load before any consent

    6

    Before a visitor clicks anything, the page loads Google Ads, Google Analytics, Google Tag Manager, Klaviyo and Meta Pixel and 1 more (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

  • 20 cookies set on arrival

    20

    Opening the homepage sets 20 cookies, 1 of them by other companies (measured from a US location before any click).

  • No consent tool detected

    No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

  • 39 other companies contacted

    Loading the homepage contacts 39 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.

Security, domain, email and software versions

The security, domain and email checks, software and plugin versions, and any app with a known security problem are visible only to people at tso.co, because details like these could help someone attack a site. Every review keeps them private, whatever they found.

Apps on your store

Your storefront loads 10 apps. Each one is code from another company running for your shoppers.

Apps your storefront loads

Triplewhale · Klaviyo Email Marketing Sms · Affirm · Zipifypages · Forms · Rivo Loyalty Rewards Referrals · govx.com · gorgias.chat · socialsnowball.io · 9gtb.com

Apps found in the homepage's code. Apps that only run in checkout or the admin aren't seen, and a headless storefront shows none. App data from programmable.info

Upkeep, stack and company

Stack

Framework
jQuery
E-commerce
Shopify
Analytics
Google Analytics | Google Tag Manager
Hosting
Shopify

Upkeep, stack, hiring and company data from programmable.info

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