This freehub body is specifically engineered to fit the UNAAS Pro 2 rear hub shell and is not a universal part compatible with other wheel brands or even other UNAAS models such as the standard Pro or HARD series. Hub internals, ratchet systems, and freehub interfaces vary between models, so fitting the wrong freehub body can result in poor engagement or damage to the hub. If you are unsure whether this is the correct freehub for your specific UNAAS wheelset, please contact DoGoodCo with your wheel model and purchase date before ordering.

SRAM XDR is a freehub body standard used by SRAM's modern 12-speed road and gravel groupsets, and it is a slightly different design from the older XD standard used on some mountain bike cassettes and from Shimano's freehub interface. If you are upgrading your bike from a Shimano or SRAM 11-speed groupset to a SRAM 12-speed AXS groupset, or building a new bike around SRAM 12-speed shifting, you would need an XDR-compatible freehub body like this one to run your cassette correctly on your UNAAS Pro 2 wheel. Fitting the correct freehub standard is essential for correct gear shifting and cassette seating, so always confirm your groupset's exact freehub requirement before ordering.

Ceramic bearings generally offer lower rolling resistance and smoother, more consistent spin than standard steel bearings, which can translate into a marginal efficiency gain and a noticeably smoother freewheeling feel while coasting. They also tend to be more resistant to heat build-up under load, though they still require proper sealing and periodic servicing to perform well long-term, especially in humid or wet Indian riding conditions. Choosing this ceramic-bearing freehub over a standard steel-bearing option is mainly a performance upgrade for riders who want the smoothest possible drivetrain feel from their UNAAS Pro 2 wheel.

While swapping a freehub body is a relatively straightforward mechanical task for an experienced home mechanic with the right tools, we generally recommend having it fitted by a qualified bicycle mechanic, particularly given the precision fit required around ceramic bearings and the hub's internal ratchet mechanism. Incorrect installation or over-tightening can damage the bearings or affect freehub engagement, which would not be covered under standard defect protections. If you are not confident performing this yourself, your local bike shop or DoGoodCo's service partners can help with correct fitment.

Yes, this is a genuine Winspace-manufactured freehub body sold directly by DoGoodCo, not a generic aftermarket part. As a standalone spare part or accessory rather than a complete wheelset, this freehub body does not carry the same 1 to 2 year wheelset warranty that applies to full UNAAS wheelsets, and instead is covered only by standard protection against manufacturing defects at the time of purchase. This is consistent with how freehub bodies and other individual components are handled across the Winspace and UNAAS range. If you receive a defective unit, contact DoGoodCo promptly with your order details so we can assist.

Ceramic bearing freehub bodies benefit from being kept as dry as possible, so avoid directing high-pressure water jets at the hub when washing your bike, especially during the monsoon when wheels are exposed to more standing water and road spray. Wipe down the freehub body and surrounding hub area after wet rides, and have it serviced periodically, checking bearing smoothness and pawl engagement every few months if you ride frequently in wet conditions. Prompt drying and light lubrication where appropriate will help the ceramic bearings and ratchet mechanism last as long as possible.

Orders are typically dispatched within 3 working days of order confirmation. Total delivery time after dispatch depends heavily on your specific location and pin code, so we cannot promise an exact day-count range, but we will share courier tracking details as soon as your order ships. Please note all orders on DoGoodCo are prepaid at checkout, and cash on delivery is not available for this product.