Both of these tyres are the Alpencross version, which feature Kevlar beads, saving 70 grams and meaning they can be folded away. They also feature 'Snakeskin' a light and flexible sidewall layer that makes them extremely resistant to sidewall scrubbing by rocks, something that can end a race in one swoop.
In addition they have puncture protection in the form of 'RaceGuard' to stave off thorns, pins etc. A rubber compound is coated on the outside of the tyre bead to stop it slipping round the rim when subject to very hard braking and ripping the valve stem off. It seems to work well and the puncture protection has been superb. I used these in the World Champs and for many rides since, but have not had a single puncture. This more than makes up for the extra weight of the puncture protection systems, which brings total tyre weight to about 690 grams each.
I think these are ideal tyres for adventure racing, I'd buy them again without hesitation, despite the price. They would be very worthwhile looking at for those that are keen to try tubeless tyres using one of the liquid latex systems on the market, as the puncture resistance is first class and losing the inner tube would compensate for the slight increase in weight compared to the standard version of the tyre.
The Albert is available in 2.1", 2.25", and 2.35" widths (Alpencross in 2.25"only) and each is available in Tubeless form. The 2.1" size is available for 29" wheels too.
The Smart Sam is available in 2.1" and 2.25" widths, with Tubeless available in the 2.1" and Alpencross in the 2.25" only. No 29" version is available.
For more details please visit: http://www.schwalbe.co.uk   Page 3 of 3
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