Slowbee Posted July 2, 2008 Posted July 2, 2008 OK, so the learning continues ... I was spinning my wheels on the newmtn bike , listening for any odd noises eminating from the wheels. Withsome suprise I noticed that the rear disc does not spin in a perfect circle,but rather slightly oval, maybe a few mm, but still something you can notice when you look closely. Should this be something to worryabout as these are brand new discs and wheels? (they have seen about1km of tar and 500m of grass verge to date)
mtbfreak Posted July 2, 2008 Posted July 2, 2008 you referring to the disk brake rotor? and not the rim?
Hog_ Posted July 2, 2008 Posted July 2, 2008 OK' date=' so the learning continues ... I was spinning my wheels on the newmtn bike , listening for any odd noises eminating from the wheels. Withsome suprise I noticed that the rear disc does not spin in a perfect circle,but rather slightly oval, maybe a few mm, but still something you can notice when you look closely. Should this be something to worryabout as these are brand new discs and wheels? (they have seen about1km of tar and 500m of grass verge to date)[/quote'] Your bike is trying to tell you that it needs to be ridden offroad, for at least 20k's or more. It's trying to tell you that mtb's on the road are gay. I've also had oval discs, never bothered me enough to find out if it's a flaw, a feature, or if I should stop working on my own bike. If it works don't fix it.
MintSauce Posted July 2, 2008 Posted July 2, 2008 They're not oval. I think it's as a result of the holes in the rotor being slightly larger than the bolts that hold them to the hub, thus they are not perfectly in the middle. Mine are the same....don't worry about it. DISCLAIMER: JUST MY OPINION....DON'T BLAME ME IF IT BREAKS
Johan Bornman Posted July 2, 2008 Posted July 2, 2008 It's a feature, not a fault. I once read in a motorbike review by a local motoring hack that irregularly shaped disks (this one looked like a daisy) improve cooling. He never answered me when I asked him to explain how.
AndreZA Posted July 2, 2008 Posted July 2, 2008 They're not oval. I think it's as a result of the holes in the rotor being slightly larger than the bolts that hold them to the hub' date=' thus they are not perfectly in the middle.Mine are the same....don't worry about it.DISCLAIMER: JUST MY OPINION....DON'T BLAME ME IF IT BREAKS[/quote'] Jip, same here.
Canaris Posted July 2, 2008 Posted July 2, 2008 mud clearance out of the dics break itself. Some discs are daisy shaped, others have lots of holes, others actually have teeth. that and cooling (more cooling surface maybe?). And for some it looks way cool
Slowbee Posted July 2, 2008 Author Posted July 2, 2008 i seem to be picking up a common thread here ...... "shut up and ride"
mtbfreak Posted July 2, 2008 Posted July 2, 2008 you can only stare at it so long before hopping on a gettin it dirty....
KevinV Posted July 2, 2008 Posted July 2, 2008 Yeah, come on Slowbee, the Helderberg awaits you and your (almost) virgin bike!
Hog_ Posted July 2, 2008 Posted July 2, 2008 Yeah' date=' come on Slowbee, the Helderberg awaits you and your (almost) virgin bike![/quote'] Well, it's only been on a bit of grass, so I guess in virginity terms that's a bit like feeling if there's grass on the pitch? The bike is still a virgin.
Mats Posted July 2, 2008 Posted July 2, 2008 If I had a new bike waiting for me at home I would have left a long time ago.No wait? I wouldn?t have gone to work.
MintSauce Posted July 2, 2008 Posted July 2, 2008 Yeah' date=' come on Slowbee, the Helderberg awaits you and your (almost) virgin bike![/quote'] Well, it's only been on a bit of grass, so I guess in virginity terms that's a bit like feeling if there's grass on the pitch? The bike is still a virgin. No, no....someone else got to her before he did
Hog_ Posted July 2, 2008 Posted July 2, 2008 Yeah' date=' come on Slowbee, the Helderberg awaits you and your (almost) virgin bike![/quote'] Well, it's only been on a bit of grass, so I guess in virginity terms that's a bit like feeling if there's grass on the pitch? The bike is still a virgin. No, no....someone else got to her before he did Ah ok! Sloppy seconds then
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