[Polk]

I am trying to find out what years of Reba uppers/CSU fits current Rebas and/or SIDs. I know that dual air cannot be mixed with single air, and Rebas can only be mixed with SID B.

I am looking to fit a 1 1/8" straight steerer CSU in a new Reba or SID with a 15mm thru axle for a nice fillet brazed 29er frame I have.