hey guys... got a new set of RDA s13 250mm front rotors im trying to install on s13 disk brake setup on a 1200 sedan but the inside of the rotor is hitting the hub edges and wont go on. Are there different inside sizes or does anyone recommend machining the inside of a rotor, say only bout 2mm. Theres already a set on and they fit fine.
heres a pic. the yellow line is the edge thats hitting


cheers

Attach file:

---

  photo.png (195.90 KB)

Hey mate I make the adapter plates you need to machine your hubs to fit the rotors makes changing rotors easier in the future

See S13 Brakes

cheers guys. i had already had a read of the wiki page. Its just odd as the set already on fit fine. so im guessing the previous owner had the rotors machined

aftermarket rotors may be manufactured to different tolerances. They'll still fit an S13 hub, but if your datsun hubs were machined too closely to just fit under a stock S13 disc, aftermarket ones may not fit. Answer is to machine a bit more off the hub.