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 beloved 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. Yet, this isn’t the first time we’ve caught a glimpse of them. And this is the part most people miss: prototypes with logos carefully obscured were spotted as early as June 2025 at the Critérium du Dauphiné, hinting that these tires have been in the works for quite some time.
Specialized’s tire range can sometimes feel overwhelming, so let’s break it down. The original Turbo Cotton, with its iconic golden/yellow sidewalls, remains available in 24, 26, and 28mm sizes—but it’s strictly for tube use. There’s also the HOTN (Hell of the North) version, designed for cobbled classics with added protection and tread, though it’s no longer listed on Specialized’s site. Additionally, the 'Turbo Cotton Folding Racing Only' tire, available in 26 and 28mm sizes, features a 320TPI cotton casing and T2/T5 compounds but is also tube-only.
Last year, at Opening Weekend, teams were seen using the S-Works Turbo TLR tire, recognizable by its distinct 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 of the cotton sidewalled tires. Enter the new Cotton TLR, designed to meet that demand. These tires feature a polyester core wrapped in cotton, which likely aids in containing tubeless sealant.
Specialized boldly claims these tires ‘combine the feel of cotton with the speed and precision of modern tubeless technology.’ Interestingly, the press material reveals that only six pairs of these tires initially existed—and Bora Hansgrohe allegedly refused to return them, prompting Specialized to ramp up production. While this makes for a great PR story, what truly 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 mentioned it was for protection, but we’re still digging for more details.
The Cotton TLR tires will be available in 38, 30, and 32mm sizes, with claimed weights of 280, 290, and 320 grams, respectively. They boast a 320 TPI construction and Specialized’s Gripton T2/T5 compound—the same compound used in the S-Works Turbo TLR, though that model features a 120 TPI casing. Specialized also notes that these tires are manufactured to ISO standards, though the specific standards for seamless tubeless setup aren’t mentioned.
Here’s where the debate heats up: With so many options already available, do these new tires truly fill a gap, or are they just another niche product? And what’s the deal with that clear sealant? Could it be a secret weapon for pro teams, or just an experimental tweak? Let us know your thoughts in the comments—we’d love to hear if you think these tires are a must-have or just another marketing gimmick.
About the author: Tom joined the Cyclingnews team in late 2022 as a tech writer, bringing over a decade of 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 just as comfortable dissecting the latest innovations as he is testing them on the road. From interviewing cycling legends like Mathieu van der Poel to tackling the Roubaix Challenge, Tom’s expertise spans every corner of the sport. Before you comment, don’t forget to confirm your public display name!
