Can anyone identify who makes this pulley and what size it is (15% up to 19%)? I ask because it came with my car (02 R53) and I'm trying to figure it out before replacing my stock crank pulley with 0% to 4% being my "Alta" options. Any ideas?







My guess is that it is an older style as my mechanic said it looks like it has been on there for awhile. What I see are 6 allen bolts, the pulley is flat grey in color, similar to the nearby housing, Also, there appears to be a black rubber/plastic grommet in the middle. If I take the pulley off and measure the circumference, would that tell me what size it is? Any help would be appreciated and as always thank you!

Matt

 

looks like mania.

 

i think it the mini madness pulley. they do a 15% and a 19%

 

Mini-Madness pulleys do use 6 graded bolts, and the outer lip looks right.
http://www.mini-madness.com/index.as...PROD&ProdID=10

 

Ok thanks guys! I'll give them both a call and see if they can help. Does anyone know what the circumference is or the diameter of the various pulley sizes? If push comes to shove I could pop the pulley off and measure it. If all else fails, I could just replace it with a known pulley size. The hard work is done (popping the OEM pulley off). How light is too light? Is the new all aluminum madness pulley too light at 5.5 to 5.0 oz for 19% to 15% reduction respectively? That seems to be 1/2 the weight of the 11 oz OE pulley.

Thanks

 

Not Mini Mania.

Ken