funflair
LIFE MEMBER
Just the centre on the one in the photo the disc is still the original Shimano XTR, the truth is I bought the wheels 6 bolt brake fixing and I bought the XTR group set then got my tools out to assemble it all, oops Shimano spline on the brakes so thinking cap on and as work was paying it was a good product development challenge.Wow Martin amazed at your carbon skills, top bloke !!!
But carbon disc brake rotors, you gotta be mad![]()
Once I had the carbon centre I started experimenting with different disc materials and had some high temperature resin so gave it a go, first time out to try in anger I pulled up really hard at the bottom of a fast descent and then jumped off a grabbed the carbon front disc and it was only just warm then grabbed the back one as comparison and I had the print of a Shimano disc burnt into my fingers for a week, so far so good so next was a bit descent but using the front brake to keep the speed down all the way and this obviously built up too much heat and pfft lever back to the bars but a quick pump and it was back but still a failure, mark 2 was a titanium disc onto the carbon rotor but that tended to pick up the titanium in the pads and the started to chuck titanium sparks out the front, very cool but not production friendly so I scrapped the idea.
I will add that the carbon chain rings started as a similarly daft idea but worked and eventually caught on to the point that all the GB olympic track bikes use them and lots of time trial riders use them as well.
Martin