You're right. I had another look at the manual and all the part numbers have a 1 in front now. I'm guessing the hex is the same but they changed the rim. Muratti mentioned on another thread (about new parts releases) that there's some new rims out. My old rims have bigger hexes than the JConcept Rulux wheels (but I compared a tired old Tamiya wheel with a brand new Rulux), so if you have Tamiya rims that are tighter than the Rulux, I guess they are a new part. Did these come with the 502X kit?
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