After nearly a year of tantalizing hints, Specialized has finally unveiled its highly anticipated tubeless cotton tires, leaving cycling enthusiasts buzzing with excitement. But here's where it gets controversial: is this innovation a game-changer or just another addition to an already complex lineup? Let’s dive in and explore what makes these tires stand out—and why they’ve already sparked debate.
Specialized has officially launched a tubeless-compatible version of its iconic Cotton tire, marking a significant milestone for the brand. The Turbo Cotton and Cotton tires have been staples in Specialized’s lineup for years, with the original clincher version famously helping Tony Martin clinch the World Time Trial Championship back in 2012. And this is the part most people miss: these tires aren’t entirely new to the scene. Keen-eyed observers spotted them as early as June 2025 at the Critérium du Dauphiné, where they appeared with logos cleverly obscured, hinting at their impending release.
Navigating Specialized’s tire range can sometimes feel like solving a puzzle. Let’s break it down. The original Turbo Cotton, with its distinctive golden/yellow sidewalls, remains available in 24, 26, and 28mm sizes—but it’s strictly for tube use. Specialized also introduced a Hell of the North (HOTN) variant, designed for cobbled classics with added protection and tread, though it’s no longer listed on their site. Additionally, the Turbo Cotton Folding Racing Only tire, available in 26 and 28mm sizes, boasts a 320TPI cotton casing and T2/T5 compounds, but it, too, is tube-only.
Last year, at Opening Weekend, teams were seen testing the S-Works Turbo TLR tire, recognizable by its unique sidewall color and hot patch logo. This tubeless-friendly model goes up to 30mm, but riders were clearly craving a larger tubeless option with the performance characteristics of the cotton sidewalled tires. Enter the new Cotton TLR, designed to fill that gap. These tires feature a polyester core wrapped in cotton, which likely aids in containing tubeless sealant—a clever engineering touch.
Specialized boldly claims these tires ‘combine the feel of cotton with the speed and precision of modern tubeless technology.’ Interestingly, the brand’s press materials reveal a fun behind-the-scenes story: initially, only six pairs of these tires existed, and Bora Hansgrohe was so impressed they refused to return them (allegedly). Specialized’s solution? Go into full production. While this makes for a great PR story, what caught my attention at Opening Weekend was a mysterious clear sealant applied to the outside of the Cotton tires on Red Bull Bora’s bikes. The team mechanic described it as a protective measure, but its exact purpose remains a topic of curiosity.
The Cotton TLR tires will be available in 38, 30, and 32mm sizes, with claimed weights of 280, 290, and 320 grams, respectively. They feature a 320 TPI construction and Specialized’s Gripton T2/T5 compound—the same compound used in the S-Works Turbo TLR, though that model has a 120 TPI casing. Specialized also notes that these tires are manufactured to ISO standards, ensuring a seamless tubeless setup, though they don’t specify which standards.
Now, here’s the controversial question: With so many options already available, does the Cotton TLR truly fill a gap, or is it just another niche product in an already crowded market? Let’s discuss in the comments—do you think these tires are a must-have upgrade, or is Specialized overcomplicating their lineup? Share your thoughts below!
About the author: Tom joined the Cyclingnews team in late 2022 as a tech writer, bringing over a decade of hands-on experience as a qualified mechanic and a lifelong passion for cycling. With a background in racing at the national level and a keen eye for pro-team tech, he’s equally at home tinkering in the garage as he is testing the latest gear on the road. From interviewing cycling legends like Mathieu van der Poel to tackling the Roubaix Challenge, Tom’s expertise and enthusiasm shine through in every piece he writes.
