Argon18 Electron Pro RIO Dropouts 1/8" The fastest track tyre in

The fastest track tyre in the world combined with the very best TPU ((Thermoplastic Polyurethane) inner tube material inside its tubular construction

1 front derailleur mount

The dual grip strips provide a secure hold without them falling down

Mounting hardware supplied

Note: There are a couple different axle systems that Mavic use in their wheels

Argon18 Electron Pro RIO Dropouts 1/8" The fastest track tyre inReplacement rear dropouts for the Pre 2019 Argon18 Electron Pro RIO Frameset. Specifications: Compatible with the Pre 2019 Electron Pro frameset CNC Machined 304 Stainless Steel Stainless steel countersink screws Extra fastenings for increased durability Includes: 1x pair (x2) dropouts