V2 of our rear uprights. We have further added more material to the hub for higher durability. Hard composite version resulting in higher corner speed but may take away some drivability.

Note:

If you are upgrading the suspension of XQ1 or XQ1S, you also need to purchase the 3.0mm outer suspension pins #XP-10602 and Hard Strong Front And Rear Composite Suspension Arms #XP-10923.