Dynamo Wheel; Gravel/Road Plus Disc Dynamo Quick Release 650B/ 27.5 Tubeless Outpost Richmond $ 666.69 Default Title - $ 666.69 Quantity Contact us at the link below for current availability. Alfine DHS501/ Velocity Blunt SS Specs: Recommended range of tire size 650bX42 to 650bx50 or 27.5x2.1 to 27.5x2.4 Brake interface type disc only Axle interface type quick release Rim inner with/style i26 tubeless