Manitou IRT Service
Please watch • Casting Service for Manitou Forks with Thr... before proceed with this service.
You must depressurise the main air spring before removing the IRT - failure to do so may cause damage to the fork or injury.
Manitou Infinite Rate Tune, or IRT, Secondary Positive Air Spring technology for mountain bike suspension forks.
IRT is a two-stage air spring configuration that enables advanced spring rate tuning by independently adjusting air pressures in the beginning, mid, and end strokes. The IRT secondary positive air spring affects only the middle to end strokes of the fork. This allows the primary air spring to be set to lower pressures for improved small bump sensitivity while maintaining independently adjustable mid-stroke support and end-stroke ramp-up.
This video covers IRT:
Removal
Service
Installation
Manitou's IRT technology is compatible with these Manitou forks:
Circus Pro
Dorado Pro
JUNIT Expert / Pro
Machete
Mattoc Pro
Mezzer Pro
Manitou fork service kits and parts: https://hayesbicycle.com/collections/...
Manitou Suspension set-up guides and service manuals: https://hayesbicycle.zendesk.com/hc/e...
Chapter 1: Intro 00:00
Chapter 2: IRT Assembly Removal & Service 00:38
Chapter 3: IRT Installation 02:15
Chapter 4: Wrap-up 3:34