They're very similar to the castle motors (same rotor size, same coreless design, same external shape and size) although rebuildable and with solder tabs. I'm sorry this is turning into a tekin thread, but at least its good motivation for castle to hurry up with lower kv motors for 1/10 scale.
Check out my custom converted 8ight:
Sub 7lb, lowest CG of any 1/8 buggy