20v vented rear brakes on 90q B2

maartenmoerman · 20-09-21, 08:38 PM

I'm also upgrading the front to 280mm with boxster calipers, golf 1 adapter kit, and redrilled/bored 280mm rotors for a Golf.

Not sure if my math is right, but i was thinking this:

- original 90q is 256mm front and 245mm rear. 256/245 = 1.04 ratio
- new setup is 280mm front and 269mm rear. 280/269 = also 1.04

Anybody can chime in, if my thinking here is correct, or do brake dynamics work in a COMPLETELY different way?

Did some more googling and searching 5x112 swap information (you'd be surprised what kind of info you find there). And some person pointed out somewhere that 200 20v brake might fit. Hat height of stock discs is almost 40mm, and the 200 20v brake (part number 447615601A ) is 46mm, but the disc is also 2 mm wider. This might fit with a spacer on the bracket? I noticed, i can get a set on ebay for 31 euro, so might be worth a shot...

20-09-21, 08:38 PM	#6
maartenmoerman Grown up member Join Date: May 2010 Posts: 23	I'm also upgrading the front to 280mm with boxster calipers, golf 1 adapter kit, and redrilled/bored 280mm rotors for a Golf. Not sure if my math is right, but i was thinking this: - original 90q is 256mm front and 245mm rear. 256/245 = 1.04 ratio - new setup is 280mm front and 269mm rear. 280/269 = also 1.04 Anybody can chime in, if my thinking here is correct, or do brake dynamics work in a COMPLETELY different way? Did some more googling and searching 5x112 swap information (you'd be surprised what kind of info you find there). And some person pointed out somewhere that 200 20v brake might fit. Hat height of stock discs is almost 40mm, and the 200 20v brake (part number 447615601A ) is 46mm, but the disc is also 2 mm wider. This might fit with a spacer on the bracket? I noticed, i can get a set on ebay for 31 euro, so might be worth a shot...