Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

chelseabikes.co.uk

Chelsea Bikes shop London | Used, New bicycle | Second hand bicycles, Electric bikes - Cycles Store

Page Load Speed

5.2 sec in total

First Response

977 ms

Resources Loaded

3.9 sec

Page Rendered

271 ms

chelseabikes.co.uk screenshot

About Website

Click here to check amazing Chelsea Bikes content for United Kingdom. Otherwise, check out these important facts you probably never knew about chelseabikes.co.uk

The company has a strong commitment to hard work and provides Top quality new and second-hand bicycles including Racing, Hybrid, Mountain, Folding and electric bicycles in London, and its spare parts....

Visit chelseabikes.co.uk

Key Findings

We analyzed Chelseabikes.co.uk page load time and found that the first response time was 977 ms and then it took 4.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

chelseabikes.co.uk performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

14/100

10%

LCP (Largest Contentful Paint)

Value5.3 s

21/100

25%

SI (Speed Index)

Value9.1 s

14/100

10%

TBT (Total Blocking Time)

Value2,460 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.07

96/100

15%

TTI (Time to Interactive)

Value14.7 s

8/100

10%

Network Requests Diagram

chelseabikes.co.uk

977 ms

layout.css

125 ms

style.css

368 ms

jquery.lightbox-0.5.css

330 ms

prototype.js

605 ms

Our browser made a total of 105 requests to load all elements on the main page. We found that 70% of them (74 requests) were addressed to the original Chelseabikes.co.uk, 10% (11 requests) were made to Embed.tawk.to and 6% (6 requests) were made to I.imgur.com. The less responsive or slowest element that took the longest time to load (977 ms) belongs to the original domain Chelseabikes.co.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 339.8 kB (28%)

Content Size

1.2 MB

After Optimization

881.2 kB

In fact, the total size of Chelseabikes.co.uk main page is 1.2 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 45% of websites need less resources to load. Images take 683.1 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 59.3 kB

  • Original 70.6 kB
  • After minification 56.0 kB
  • After compression 11.3 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 14.6 kB, which is 21% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 59.3 kB or 84% of the original size.

Image Optimization

-8%

Potential reduce by 53.9 kB

  • Original 683.1 kB
  • After minification 629.2 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Chelsea Bikes images are well optimized though.

JavaScript Optimization

-44%

Potential reduce by 182.2 kB

  • Original 413.1 kB
  • After minification 377.5 kB
  • After compression 230.9 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 182.2 kB or 44% of the original size.

CSS Optimization

-82%

Potential reduce by 44.3 kB

  • Original 54.1 kB
  • After minification 45.0 kB
  • After compression 9.8 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Chelseabikes.co.uk needs all CSS files to be minified and compressed as it can save up to 44.3 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 30 (29%)

Requests Now

102

After Optimization

72

The browser has sent 102 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chelsea Bikes. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 27 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

chelseabikes.co.uk accessibility score

85

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

chelseabikes.co.uk best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

chelseabikes.co.uk SEO score

92

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Chelseabikes.co.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Chelseabikes.co.uk main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph description is not detected on the main page of Chelsea Bikes. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: