The iRiX headset is the ultimate headset system for your bike. Inspired by the Greek goddess Iris, the personification of the rainbow, and the Roman numeral IX, the iRiX embodies the core DNA of Industry Nine. Featuring bearing cups, top covers, and top caps that are machined, anodized, and laser-etched using US-sourced 7075 aluminum in Asheville, NC USA. With every common modern size and 11 lustrous colors available, there is an iRiX to complement any bike build.
Designed with ease of service and bearing life in mind, the iRiX headset boasts features such as split crown races and top cover compression rings, making installation and removal tool-free. Two available top cover heights allow riders to hone their perfect fit or aesthetic, while the top covers boast an integrated adjustable shim stacking function to dial in the ideal headtube clearance on IS applications. To keep the sealed bearings contaminant-free, the crown race and top cover employ removable and replaceable silicone lip seals, ensuring a smooth ride every time.
The iRiX headset uses industry-leading 440c Stainless Steel bearings with a lifetime warranty, guaranteeing that your turns will remain as smooth as on day one. And with the custom color selection available for lower cups, upper cups, top covers, and top caps on EC and ZS models, as well as top cover and top cap on IS options, you can create a one-of-a-kind look for your bike.
|Position:||Both top and bottom|
|Style:||Zero Stack (ZS4428.6/ZS5640)|
|Upper Headtube Bore:||44mm|
|Lower Headtube Bore:||56mm|
|Top Cover Height:||5mm, 15mm|
Please reach out to us with any questions you may have on anything we sell. We want to make sure you get the right part the first time. Our lifelong riders at Thunder Mountain Bikes are knowledgeable and would love to talk to you!
We currently offer both economy and expedited shipping options though FedEX and USPS.
Orders totaling over $49 are eligible to ship for free via an economy ground option of our choice.
If you're in need of something super-quick, please contact us directly. We may be able to overnight your order with an additional fee and depending on your location.
Should there be an issue with the item you bought, or you no longer need your purchase, we will be happy to set up a return.
All returns must be requested within sixty (60) days of the fulfillment date (i.e. the date we printed the shipping label and boxed up your order.) All returned items must be received in new and unused condition, with the original tags and labels attached, and in the original packaging. We cannot accept returns on any items that have been installed or show wear of any kind.
To request a return, please visit: returns.thundermountainbikes.com and follow the steps to return eligible items from your order.
After receiving your return and inspecting the condition of your item, we will process your return. Please allow at least seven (7) days from the receipt of your item to process your return or exchange. We will notify you by email when your return has been processed.
For all Special Order items, there is a 25% restocking fee. Special Order items are those that we do not currently stock.
For defective, damaged, or if we sent you the wrong products, please contact us using the phone number or email below.
If you have any questions concerning our return policy, please contact us at: