2 x Schwalbe Marathon Plus MTB HS468 Reflex SmartGuard. The puncture resistant tyres. The most puncture proof MTB tyre is now E-Bike Ready. With ECE-R75 certification mark. On the middle bar it rolls easily over fixed paths. The strong outer studs have bite in the terrain. The SmartGuard offers superior puncture protection. – Size: 29 x 2.25 / 57-622 – Compound: Dual – Puncture protection: SmartGuard. – Stud profile with central bar. – ECE-R75: approved for e-bikes up to 50 km/h. – Can be used for front and rear wheel. – Colour: black with reflective strips that are surrounding the side. – 2 x clincher tyres. – Schwalbe bicycle inner tube 29 inches. – Tested and stable air pressure. – Pack of 2 – Valve type car valve / Schrader – valve length 40 mm. Bicycle tyre sizes: Basically, there are two units of measurement for bicycle tyres: most sizes are in inches. 26 x 2.0 inches describes the inner diameter and the width of the tyre in inches. The specification in millimetres, e.g. 50 – 559 according to the EU standard ETRTO. The tyre width is at the front. However, you can not rely on the width specification as manufacturers specify the carcass width or profile width differently, i.e. tyres with the same tyre width can vary in width. Please order bicycle tyres according to the EU standard ETRTO. Valve type for tyre sets: please check which valve you need.