135mm Surly front hub, 170mm Salsa rear hub with Shimano free hub. Rims are Salsa Semi 29er. Tires: Spec FastTrack. Lightly used with a few nicks and scratches. 6 bolt disc. Front has one broken rotor mounting bolt that has resisted extraction. If you want to be able to convert your fatbike to a 29er on the cheap, make me an offer. Though not pictured, QR skewers are included.