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12x135MM Direct Drive Thru Axle Fitment
You will need to identify the type of axle included with your trainer. Review the following FAQ before choosing an option below: Which Type of Axle Do I Have on My Tacx Trainer?
NOTE: Most newly purchased Tacx direct drive trainers will be a Type 2 trainer. The exception would be a trainer that has sat on a shelf for an extended period of time.