Tern Bicycles on Twitter: "A friendly reminder for those living in cold and snowy places: the Schwalbe Marathon Winter Plus 55-406 (20 X 2.15) fits the GSD and the Vektron! #terngsd #ternvektron #
Spiked tyres for cycling on ice! First ride on the Schwalbe Marathon Winter Plus tyres. - YouTube
SCHWALBE Marathon Winter Plus Performance Twin SmartGuard #592202
Amazon.com : Schwalbe - Marathon Winter Plus Wire Clincher Bike Tire | 29 x 2 | Performance Line, SmartGuard | 208 Steel Studs | Black : Sports & Outdoors
Schwalbe Marathon Winter Plus 26" Studded Wired Tyre Set - bike-components