how to recognize a Type R cam

weight would be an easy way to tell, imo

Well, I just wasted a lot of time comparing a set of type s cams and type r cams.. They look identical... The type r cams, has r3 and r1 and the type s cams have r2 and r1.. Other than that , they look the same.. Both of them have grooves..

At this point, unless you are buying them from someone you know, I would be careful...

Using precise instruments, you can see that the type r cams have taller lobes but the difference is not much and not everyone can see it...

I would take some pics but no point really.. They look the same..

Yeah, if you have a set of cams, just use them... and hope for the best.. No sense into wasting money to find out what they are. My .02

there is no real way to tell.