Disc rotors rotation looks wrong?

Jools79

Hi,

After a bit of help, I just got some Superstar Flame disc rotors and fitted them to my bike.

The rotation arrow says to put them on like this:

http://www.flickr.com/photos/16349194@N04/4971383053/

it just looks the wrong way to me, other similar design rotors I have had go the other way.

The 2nd pic i have tried to show the small arrow pointing to the left, its basially between the top two rotors bolts and looks like a scratch.
(poor quality pic from my iphone im afraid)

http://www.flickr.com/photos/16349194@N04/4971998012/

Ii may be being stupid but just dosent look right to me and stupidly wondering if I have put them on the wrong way and the arrow is incorrect :shock:

nicklouse

looks fine to me.

njee20

it just looks the wrong way to me, other similar design rotors I have had go the other way.

Then you've fitted other rotors the wrong way round! The vanes always 'point' forward to minimise the distortion under braking.

Jools79

Thanks for the quick reply, my previous bike had the rotors fitted like this:

http://www.flickr.com/photos/16349194@N04/4972037334/

with the vanes going backwards, it was fitted by my local bike shop so presumed it was the correct way for rotors of this design.

njee20

They're different though, they're largely symmetrical, they do have a rotating direction though still. You've got it right now, don't worry!

ride_whenever

That's a stupid design, if you've got a pad spring then the rotor will catch it and pull it through, and pushes mud into the rotor notches.

However they are both the right way round.

diy

Saw cut rotors have largely gone out of fashion on motorbikes, because they provide very little additional cooling over a wave cut rotor, but have the downside of impacting braking feedback.

I wonder if the same applies to bikes?

The idea behind the saw cut is that it directs air into the disc to improve cooling, rather than just increasing surface contact with air.

Northwind

I think the actual idea behind saw rotors is that people like how they look TBH I could never tell any difference between my Braking wavys and my EBC round rotors, or OEM rotors for that matter, I think a lot of crap's talked on the subject meself. But the stuff you see at motorbike shows... Discs laser cut with your name, wtf? Or a load of Hayabusa logos or similiar. But my favourite is the discs with the coatings. Yes, your rotor is currently black. Yes, this will instantly be sanded off when you use it. Yes, the material used for the coating may well clog up your pads.

diy

See below disc on a Puch Maxi wheel (thats a 50cc moped to the uninformed)



I rest my case m'lud