--- title: "Castelli vs Rapha: Which is searched more?" description: "Is Castelli or Rapha more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Bike shorts brands set worldwide. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time." canonical: "https://gobrandwave.com/demand/global-en/categories/bike-shorts-brands/compare/castelli-vs-rapha" publisher: "Brandwave" --- # Castelli vs Rapha: Which is searched more? Is Castelli or Rapha more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Bike shorts brands set worldwide. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time. ## Key facts - **Compared**: Castelli and Rapha - **Competitive set**: Bike shorts brands - **Market**: Global - **Month measured**: Sep 2026 - **Castelli Share of Search**: 24.4% - **Rapha Share of Search**: 30% ## Is Castelli or Rapha more popular in search? - In September 2026, Rapha had more branded searches than Castelli among bike shorts brands worldwide. Rapha had about 135,000 branded searches, while Castelli had 110,000. Rapha made up 30% of all bike shorts brand searches we track, and Castelli accounted for 24.4%. - Rapha was ahead of Castelli in every measured month of the 12 months ending September 2026. - Across the 12 months ending September 2026, Castelli’s share of searches among bike shorts brands worldwide moved from 26.7% to 24.4%, and its estimated monthly branded searches moved from 135K to 110K. - Across the 12 months ending September 2026, Rapha’s share of searches among bike shorts brands worldwide moved from 32.6% to 30%, and its estimated monthly branded searches moved from 165K to 135K. ## Top bike shorts brands in ChatGPT and Google AI Overviews In three ChatGPT questions and two Google AI Overviews, Castelli and Rapha were each mentioned in four out of five: in two of the three ChatGPT answers and in both Google AI Overviews. Castelli was listed before Rapha in two out of three answers that named either. Brands get a higher AI rank if they are mentioned earlier in the answers that list options. | Brand | AI rank | ChatGPT answers that named it | Google AI Overviews that named it | All answers that named it | | --- | --- | --- | --- | --- | | Assos | 1st | 1 of 3 | 2 of 2 | 3 of 5 | | Castelli | 2nd | 2 of 3 | 2 of 2 | 4 of 5 | | Rapha | 3rd | 2 of 3 | 2 of 2 | 4 of 5 | | Lululemon | 4th | 2 of 3 | 0 of 2 | 2 of 5 | | Pearl Izumi | 5th | 2 of 3 | 1 of 2 | 3 of 5 | | Baleaf | 6th | 2 of 3 | 0 of 2 | 2 of 5 | ## Every AI answer about bike shorts brands - Asked ChatGPT "Which bike shorts brand should I buy?": 1. Lululemon, 2. Baleaf - Asked ChatGPT "What are the best bike shorts brands?": 1. Rapha, 2. Pearl Izumi, 3. Lululemon, 4. Castelli, 5. Baleaf - Asked ChatGPT "What's the best bike shorts brand for long distance comfort?": 1. Assos, 2. Castelli, 3. Rapha, 4. Pearl Izumi - Searched Google, AI Overview "best bike shorts": 1. Assos, 2. Rapha, 3. Castelli - Searched Google, AI Overview "bike shorts for men": 1. Assos, 2. Castelli, 3. Pearl Izumi, 4. Rapha Brands are listed in the order each answer named them. The answers were collected in the United States on October 20, 2026. ## How did search popularity change for bike shorts brands worldwide in September 2026? - In September 2026, Castelli lost share of searches among bike shorts brands worldwide, from 24.9% to 24.4%. - Estimated monthly branded searches for Rapha worldwide fell 18.2% over 12 measured months, from 165K to 135K in September 2026. ## Month by month | Month | Castelli estimated searches | Castelli Share of Search | Castelli rank | Rapha estimated searches | Rapha Share of Search | Rapha rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 135K | 26.7% | 3 | 165K | 32.6% | 2 | | Nov 2025 | 135K | 23% | 3 | 201K | 34.3% | 2 | | Dec 2025 | 110K | 22.8% | 3 | 165K | 34.2% | 2 | | Jan 2026 | 135K | 26.6% | 3 | 165K | 32.5% | 2 | | Feb 2026 | 135K | 30.3% | 2 | 135K | 30.3% | 3 | | Mar 2026 | 135K | 24.6% | 3 | 165K | 30% | 2 | | Apr 2026 | 165K | 28.5% | 2 | 165K | 28.5% | 3 | | May 2026 | 165K | 26.4% | 3 | 201K | 32.2% | 2 | | Jun 2026 | 135K | 24.5% | 3 | 165K | 30% | 2 | | Jul 2026 | 135K | 21.4% | 3 | 201K | 31.8% | 2 | | Aug 2026 | 165K | 24.9% | 3 | 201K | 30.4% | 2 | | Sep 2026 | 110K | 24.4% | 3 | 135K | 30% | 2 | ## How each brand is measured Brandwave collects information about searches that people make online using Castelli’s and Rapha’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading. - **Castelli**: Measured on the search term “castelli”. - **Rapha**: Measured on the search term “rapha”. - [Castelli profile](/demand/global-en/brands/castelli) - [Rapha profile](/demand/global-en/brands/rapha) - [All bike shorts brands worldwide](/demand/global-en/categories/bike-shorts-brands): The set both shares are measured inside, 6 brands. ## Methodology - [How is the Brand Demand Index measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused. ## Frequently asked questions ### Is Castelli or Rapha more popular in search? In September 2026, Rapha had more branded searches than Castelli among bike shorts brands worldwide. Rapha had about 135,000 branded searches, while Castelli had 110,000. Rapha made up 30% of all bike shorts brand searches we track, and Castelli accounted for 24.4%. ## Cite this page Brandwave. "Castelli vs Rapha: Which is searched more?". https://gobrandwave.com/demand/global-en/categories/bike-shorts-brands/compare/castelli-vs-rapha This page is also available as HTML at https://gobrandwave.com/demand/global-en/categories/bike-shorts-brands/compare/castelli-vs-rapha. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.