These tyres are for racing!Courtesy of Specialized
All of the models feature a new 120TPI (as opposed to the 60TPI of old) casing, using a lightweight 210Dn thread. The casing is essentially a woven cloth which gives the tyre its structure when inflated. A higher thread count and thinner threads generally result in a lighter and more supple tyre.
That’s because the tight weave means the casing absorbs less rubber, making it lighter and more flexible. That does come at the expense of some cut resistance in the sidewall, with less rubber present to protect the threads.
The tyres use the same proprietary GRIPTON compound used in Specialized’s 2Bliss range. This rubber is claimed to have lower hysteresis — meaning it absorbs less energy when it deforms — than traditional carbon black compounds, supposedly resulting in better rolling characteristics.
Data provided by Specialized claims equivalent rolling resistance for the new Renegade S-Works compared with a Schwalbe Racing Ralph Evo (2.1in), while being almost 100g lighter.
Updated tread patterns
At a first glance, the tread patterns appear to be the same as previous incarnations, but they have actually been refined and updated for XC racing.
The tread is spaced slightly wider, reducing the number of knobs and saving a little weight. Specialized also claims that this results in increased pressure on the individual knobs, improving traction.
The overall width of the tread has also been redesigned to match the narrower width of XC tyres.
There are five new tyres in the lineup.
S-Works Renegade 2.1-inch
The new S-Works RenegadeJack Luke / Immediate Media
Lightest tyre in the range at 511g
Designed for smooth and dry hardpack conditions
Its light weight makes it well-suited to climbing
S-Works Renegade 2.3-inch
Weighs in at 575g
Extra volume adds capabilities on rough, rocky and dry hardpack terrain
S-Works Fast Trak 2.1-inch
The new S-Works Fast TrakJack Luke / Immediate Media
Fast tread design for varied courses
Suitable for dry to damp and moderately loose conditions
S-Works Fast Trak 2.3-inch
Extra volume adds rocky and rough terrain capabilities
S-Works Ground Control 2.1-inch
The new S-Works Ground ControlJack Luke / Immediate Media
Suitable for wet, soft and loose conditions
We don’t have any information on pricing or availability yet, but expect these tyres to be available to consumers soon.