Schwalbe Magic Mary Gravity Soft 26" TLR MTB Tyre - Black Giant the derailleur and cassette are

the derailleur and cassette are designed to work in lockstep using Cassette Mapping to deliver constant chain engagement for uninterrupted power transfer

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This carbon structure is combined with teeth in 7075 aluminum alloy

The generous internal rim width allows modern road tyres to perform at their best

Attachment 20” To 29” Size Wheel

Schwalbe Magic Mary Gravity Soft 26" TLR MTB Tyre - Black Giant the derailleur and cassette areExperience ultimate gravity performance with the Schwalbe Magic Mary EVO Tyre. This tyre is designed to take your rides to the next level, with Intermediate Profile knobs, Super Gravity Addix Soft compound, and TL Easy E 50 puncture protection. Conquer any track and condition, with maximum braking traction and cornering grip even on the muddiest of terrains.