Thunder Burt is Schwalbe`s fastest rolling MTB tire featuring smaller, more tightly packed square knobs in the center with larger well spaced lugs on the cornerLightweight and fast rolling tire with impressive cornering tractionASPD â Addix Speed compound features improved rolling resistance while also increasing durability and and overall gripSGRND - Super Ground, Snakeskin material running from bead to bead and three full carcass layers, the sweet spot between puncture protection and light weight in the Super lineup.E25 - are rated for use with E-Bikes up to 25kph (15mph)Tubeless29x2.25622TBLS - FoldBeltedBk/Bsk55615g67EBIKE25/ASPD/SGRND/TRNoUPC/EAN/GTIN: 4026495879750