Tech ZIPP Tubular RIM surface

kimm

Maximum Pace
Dec 25, 2009
193
25
48
tokyo, arakawaku
#1
Hi guys,
I have got a second hand Zipp 808 firecrest tubular wheelset but after I removed the tyres,
the front wheel's rim has strange surface on the rim.
I have never used Zipp wheels so I don't know this is normal or not. Can you advise below pic's
white surface(in the center) is okay to ride? (Rear wheel doesn't have this kind of color on it)..
Thank,s