Product Description Models:Type 1: Convertible to: 9 x 100 mm quick releaseBase Model: 20 x 110 mm thru-axle, 15 x 100 thru-axle, 9 x 100 mm thru-axleHub Compatibility: 3.30HDWheel Compatibility: ZTR wheelsManufacturer Number: ZH0006 Type 2: Convertible to: 9 x 100 mm thru-axleBase Model: 20 x 110 mm thru-axle, 15 x 100 thru-axle, 9 x 100 mm quick releaseHub Compatibility: 3.30HDWheel Compatibility: ZTR wheelsManufacturer Number: ZH00183720000984 Type 3: Convertible to: 15 x 100 thru-axleBase Model: 20 x 110 mm thru-axle, 9 x 100 mm quick release, 9 x 100 mm thru-axleHub Compatibility: 3.30HDWheel Compatibility: ZTR wheelsManufacturer Number: ZH0005 Type 4: Convertible to: 20 x 110 mm thru-axleBase Model: 15 x 100 thru-axle, 9 x 100 mm thru-axle, 9 x 100 mm quick releaseHub Compatibility: 3.30HDWheel Compatibility: ZTR wheelsManufacturer Number: ZH0025Contents:1 x NoTubes front upgrade kit Manufacturer: Stan's NoTubes 202 Daniel Zenker Dr Big Flats NY 14814 USA info@notubes.com Distributor: Hermann Hartje KG Deichstraße 120-122 27318 Hoya Germany info@hartje.de