Specialized Mixed Wheel Size Alloy Seat Stay Description: This Specialized Mixed Wheel Size Alloy Seat Stay replaces broken or worn seat stays found on select Specialized Stumpjumper 15 full suspension mountain bikes. Installation of this version on Stumpjumper 15 allows mixed 27.5"/29" wheel use on S5-S6-sized frames. Composed of durable alloy, this seat stay is rated to handle the demands of trail E-Bike use. Features: Genuine replacement Specialized parts Replacement alloy seat stay for select Specialized Stumpjumper 15 Bikes Enables mixed 27.5"/29" wheel use on S5-S6 size frames Compatible with replacement SRAM UDH Derailleur hanger Specifications: Material: Alloy Seat Stay Length: 434mm Drop Out Spacing: 148mm x 12mm Drop Out Type: Thru Axle