
Self-Managed
James Chantler-Mayne is a competitive triathlete with strong crossover appeal across swimming, cycling, and running. His content is built around race-day performance, endurance training, and authentic behind-the-scenes moments, making him a strong fit for brands targeting active, performance-driven audiences.
Marathon Running, Cycling
New to athlete partnerships? See how sports sponsorship works on OpenSponsorship.
1 post & 1 story with the James Chantler-Mayne promoting your product.
Long-term deal involving appearances, photoshoots, social media and more.
Have James Chantler-Mayne make a live appearance at your next event
Brands can sponsor James Chantler-Mayne on OpenSponsorship by creating a free account, browsing James Chantler-Mayne's profile, and sending a sponsorship proposal for social posts, appearances, or integrated campaigns. OpenSponsorship handles messaging, deliverables, and deal terms in one platform so you can connect directly with this athlete.
James Chantler-Mayne is listed on OpenSponsorship and available for brand sponsorships. Brands can review campaign packages, audience details, and pricing on this profile, then submit a proposal to start a partnership with this athlete.
According to OpenSponsorship, estimated pricing to sponsor James Chantler-Mayne starts at $100 for a social media post, $120 for a appearance and $600 for a brand ambassador campaign. Final rates depend on deliverables, usage rights, and campaign scope. Sign up on OpenSponsorship to view packages and send a proposal.
According to OpenSponsorship, James Chantler-Mayne's audience includes 2K+ Instagram followers, interests including Fitness & Performance, Activewear, Travel, Fitness. Brands can use this profile to evaluate reach, content niche, and sponsorship fit before sending a proposal.

How do you measure influencer marketing ROI when half the numbers social media gives you are vanity metrics? It is the question brands ask us most, and it came up again when I joined Massimo Marinelli on the Berkida Ventures Podcast. After more than ten years and thousands of brand deals with athletes and creators at OpenSponsorship, here is how we think about it, and the framework we use with our clients.
October 28, 2026