Product Description No ordinary thru-axle: the Trainer Axle from the Robert Axle Project The Robert Axle for indoor trainers replaces your original thru-axle, which means you can mount your bike with 12 mm over locknut dimension on an at-home trainer. This thru-axle has been manufactured so precisely that it will fit just as well or better than the original. It is compatible with classic indoor trainers (not direct drive trainers) from popular brands such as Tacx or Wahoo. And the best thing: when you finish your session, just take your bike from the trainer, detach the right end of the axle and head on outside, as the Trainer Axle is also suitable for normal outdoor use. You can look forward to being in tip-top shape for the next season. The Robert Axle Project is run by the ultimate thru-axle experts. With their help you will find the right thru-axle - for your trailer, your indoor trainer or as a light tuning part for your MTB or road bike. To find out which thru-axle you need, you must first find out the dimensions of your current thru-axle. Often the length and the thread pitch are noted on the axle itself. If not, print this template from the Robert Axle Project (in original size, do not scale) to determine the relevant data. You can also use the configuration from the Robert Axle Project, which will help you find the correct axle using parameters such as bike brand and over locknut dimension. Specifications:Over Locknut Dimension:rear: 142 mm, 148 mmAxle Diameter:12 mmTechnical Information:Use:rear: 12 x 142 mm, 12 x 148 mmType:thru-axleAxle Material:aluminium (7075)Features:shank and axle ends CNC precision machinedhard anodised for robust durabilityno special tools required, installation and wheel removal with 5 mm hex keyclassic resistance indoor trainers from 1up, Blackburn, Cyclops, Kinetic, Tacx, Wahoo and many other manufacturers (not for direct drive)also suitable for outdoor useends of the Trainer Axle protrude 15 mm on both sidesdesigned, built and quality-tested in the USA (Bend, Oregon), used worldwideModels:Type 1: Thread Pitch:1.0 mmAxle Length:172 mm; 160 mm, 162 mm, 167 mm with spacersUse:trainersManufacturer Number:TRA213 Type 2: Thread Pitch:1.5 mmAxle Length:172 mmUse:trainersManufacturer Number:TRA204 Type 3: Thread Pitch:1.5 mmAxle Length:178 mmUse:trainersManufacturer Number:TRA214 Type 4: Use:trainersCompatibility:FOCUS R.A.T. Systems with 12 x 142 or 12 x 148 mm Boost over locknut dimensionNote:Comes with nut, which replaces the original R.A.T. nutManufacturer Number:TRA214.F Type 5: Thread Pitch:1.75 mmAxle Length:174 mmUse:trainersManufacturer Number:TRA201 Type 6: Thread Pitch:1.75 mmAxle Length:180 mmUse:trainersManufacturer Number:TRA211 Type 7: Thread Pitch:1.75 mmAxle Length:192 mmUse:trainersManufacturer Number:TRA202 Type 8: Thread Pitch:1.75 mmAxle Length:198 mmUse:trainersManufacturer Number:TRA210 Type 9: Thread Pitch:1.0 mmAxle Length:167 mm; 152 mm, 154 mm, 160 mm with spacersUse:trainersManufacturer Number:TRA217 Type 10: Thread Pitch:1.5 mmAxle Length:165 mm, 159 mm with spacerUse:trainersManufacturer Number:TRA212 Type 11: sold out, use type 4 instead Use:trainersCompatibility:FOCUS R.A.T. Systems with 12 x 142 mm over locknut dimensionNote:Comes with nut, which replaces the original R.A.T. nutManufacturer Number:TRA204.F Type 12: Thread Pitch:1.75 mmAxle Length:167 mmUse:trainersManufacturer Number:TRA221Contents:1 x Robert Axle Project indoor trainer thru-axle2 x flat spacer (Type 1 & Type 9 only)1 x X-12 tapered spacer (Type 1 & Type 9 only)1 x flat 6 mm spacer (Type 4 & Type 10 only)1 x nut (Type 4 & Type 11 only) Weight: black | type 1: 82 g black | type 2: 72 g black | type 4: 82 g black | type 6: 76 g black | type 9: 90 g Manufacturer: The Robert Axle Project 45 SW Chehalem Dr Bend OR 97702 USA info@robertaxleproject.com Distributor: MERIDA & CENTURION Germany GmbH Blumenstraße 49-51 71106 Magstadt Germany vertrieb@merida-centurion.com