Girodisc vs Stoptech friction rings

[Dxj]

I’m looking at replacement friction rings for track use for ST40 BBK and found that bimmerworld has Girodisc brand as an option. Has anyone here had experience with Girodisc rotors in general and more specifically for Stoptech replacements? Appreciate if any folks can share their experience as I’m considering trying something other than stoptech.

[Slideways]

r4dr is trying to get ZCP rotors made by Girodisc - https://nam3forum.com/forums/forum/m...ors-for-e46-m3. You might want to ask r4dr, but I don't expect them to be any worse than Stoptech rings.

[r4dr]

Anything I say will be biased, but you should call Bimmerworld and ask them. They have quite a few data points from people (including race teams) that have made the switch and reported back. Phil over at BW is great for these real world results.

[bigjae46]

In for feedback.

I'm honestly inclined to stick with Stoptechs. My rings have lasted forever. The aero rotor has some patents...not sure exactly what that is or how it improves whatever.

[eacmen]

BW is likely investing in girodisc due to supply chain issues at stoptech. I had placed an order with BW for some rings and there was backorder with no ETA. I was able to convince them to take the hw from one of their other kits.

The aerorotor hardware to mount the ring to the hat is hard to come by. The non-race hardware is $200 more per wheel than the race hw and the only difference is a washer.

I’ve seen some folks start to re-use the nut with a new bolt. Not something I would feel comfortable with.

[Dxj]

Just ordered Girodisc rotors…I’ll report back after a little while.

[shreyasvraju]

Just ordered Girodisc rotors…I’ll report back after a little while.

Dxj,
How have the Girodiscs been performing so far?