best disc brake rotors

Cqc

Hiya, I need some new disc brake rotors in 203 and 185 mm, which would you recommend? Under £15 each please. Cheers

The Rookie

No real difference between any of them, don't get floaters, and from your sizes you aren't after lightweight ones, personally I use mostly second hand ones, you could get a pair of Avid Cleansweeps which tend to be a little less prone to warpage.

jon87uk

I've got an Avid GS3 185mm that's just come of a bike. couple of years old but in good condition. PM me if you are interested. Think I also have a pair of Avid 203s that came off of a mates bike. Not sure of the exact model but could check when I get home.

CitizenLee

The Rookie wrote:

No real difference between any of them, don't get floaters, and from your sizes you aren't after lightweight ones, personally I use mostly second hand ones, you could get a pair of Avid Cleansweeps which tend to be a little less prone to warpage.

My last 3 bikes have all had Hope floaters. Nowt wrong with them apart from a little extra weight. I've only ever bent one.

Pinkbike and eBay can be good for bargains

cooldad

CitizenLee wrote:

The Rookie wrote:

No real difference between any of them, don't get floaters, and from your sizes you aren't after lightweight ones, personally I use mostly second hand ones, you could get a pair of Avid Cleansweeps which tend to be a little less prone to warpage.

My last 3 bikes have all had Hope floaters. Nowt wrong with them apart from a little extra weight. I've only ever bent one.

Pinkbike and eBay can be good for bargains

Pointless, heavy, and create unnecessary clearance problems on many bikes.

CitizenLee

cooldad wrote:

CitizenLee wrote:

The Rookie wrote:

No real difference between any of them, don't get floaters, and from your sizes you aren't after lightweight ones, personally I use mostly second hand ones, you could get a pair of Avid Cleansweeps which tend to be a little less prone to warpage.

My last 3 bikes have all had Hope floaters. Nowt wrong with them apart from a little extra weight. I've only ever bent one.

Pinkbike and eBay can be good for bargains

Pointless, heavy, and create unnecessary clearance problems on many bikes.

They look cool (IMO), they're stiffer and they shed heat better. No clearance problems on any bikes I've used them on either.

As for weight...

Hope Floating 183mm - 147g
Avid G2 Cleansweep 180mm - 149g

You were saying?

cooldad

OK, pointless then. Unless you show me the stiffness and heat bit.

supersonic

Don't know about stiffer, especially when the rivets go loose and they flop about!

CitizenLee

cooldad wrote:

OK, pointless then. Unless you show me the stiffness and heat bit.

I've only bent 1 out of the 7 or 8 I've owned and that was from a bad crash... vs quite a few bent or warped ones from other brands like Avid, Shimano, SuperStar and Hope non-floating.

As for heat dissipation, the burden of proof is on you if you dispute it

Looks are subjective, but I like them so that's all that matters!

Never popped a rivet either Supersonic.

cooldad

CitizenLee wrote:

cooldad wrote:

OK, pointless then. Unless you show me the stiffness and heat bit.

I've only bent 1 out of the 7 or 8 I've owned and that was from a bad crash... vs quite a few bent or warped ones from other brands like Avid, Shimano, SuperStar and Hope non-floating.

As for heat dissipation, the burden of proof is on you if you dispute it

Looks are subjective, but I like them so that's all that matters!

Never popped a rivet either Supersonic.

I've never bent any rotor, and never used a floating one, so that blows that argument.

As for heat dissipation, onus probandi. (Google it)

Chunkers1980

It's not popping the rivet - it's them becoming loose, so if you hold the brake on and rock the bike the wheel moves slightly even though the disc is held.

CitizenLee

cooldad wrote:

I've never bent any rotor, and never used a floating one, so that blows that argument.

As for heat dissipation, onus probandi. (Google it)

Can you bend rotors on canal paths?

You lay the charge they're pointless, therefore semper necessitas probandi incumbit ei qui agit

Chunkers1980 wrote:

It's not popping the rivet - it's them becoming loose, so if you hold the brake on and rock the bike the wheel moves slightly even though the disc is held.

To be honest I've seen this happen to a friend's but it was ancient. Mine have all been ok!

cooldad

Your latin is better than your logic.

CitizenLee

cooldad wrote:

Your latin is better than your logic.

My logic is based on owning them and using them for the last 6 or so years, whereas you've admitted you've never bent a rotor or even used a floating one, so I'll take whatever else you have to say on the matter with a pinch of I don't really give a sh!t

cooldad

Never bent one because I can ride, and never used a floating one because I don't buy pointless cr4p.
Just saying.

CitizenLee

Putting aside dyno testing and the like, I'll take my own experience of them over the opinion of a boring old fart. Cheers though

cooldad

Sadly resorting to personal insults.
I'll take that as your acceptance of defeat.

But I still love you.

(ps that could be sarcasm.)

Chunkers1980

By your own experience you've seen them fail, old or not. Old solids would have been fine.

CitizenLee

cooldad wrote:

Sadly resorting to personal insults.
I'll take that as your acceptance of defeat.

But I still love you.

(ps that could be sarcasm.)

I highly doubt I've managed to insult you

Take it however you want though champ, it won't change my opinion of them.

Chunkers1980 wrote:

By your own experience you've seen them fail, old or not. Old solids would have been fine.

I've seen ONE fail. I've also seen a Mega with a cracked chainstay, didn't stop me buying one

The Rookie

All rather academic as you won't get Hope floaters for less than the £15 budget given!

CitizenLee

The Rookie wrote:

All rather academic as you won't get Hope floaters for less than the £15 budget given!

Haha, touché

I wasn't actually suggesting the OP buys them (I suggested PB and eBay for bargain rotors), I was just disputing the claim that they're pointless. I get some people don't like the look of them, but the reasoning for their existence is sound in that the two piece design is to aid heat dissipation, which helps makes them less prone to warping as only the braking surface has to deal with the heat. You can tell it works as when you touch the carrier after a long downhill ride they're still cool, whereas the braking surface isn't, although it cools very quickly. Less heat also means more braking power. The alloy spider also makes them lighter, size for size. Plenty of stuff online to back this up.

rockmonkeysc

Floating rotors are only worth having if you can't ride properly and have to drag them down every hill and overheat your disc.
Deorsum digito caseum (I can do latin as well)

CitizenLee

RockmonkeySC wrote:

Floating rotors are only worth having if you can't ride properly and have to drag them down every hill and overheat your disc.
Deorsum digito caseum (I can do latin as well)

RockmonkeySC wrote:

Floating rotors are only worth having if you can't ride properly and have to drag them down every hill and overheat your disc.
Deorsum digito caseum (I can do latin as well)

I actually hate dragging brakes, but hey, nice generalisation of everyone who owns them

Your latin is slightly off, but I would have said Avids are more comparable to cheese

Cqc

Yeah my current ones are avid g2cs which work fine but they don't sell them any more. Are the g3cs any better?

CitizenLee

Cqc wrote:

Yeah my current ones are avid g2cs which work fine but they don't sell them any more. Are the g3cs any better?

Used for a tenner each...

http://www.pinkbike.com/buysell/1627649/
http://www.pinkbike.com/buysell/1627648/

Plenty of new ones on eBay too, albeit for more monies.

Dunno about G3Cs. Assume so if they replaced the G2Cs