PSA - Cheap Rotors - 203mm Floater

Thanks for the PSA

They're not floating rotors btw, they're 2-part solid rotors. Which is almost certainly better, but, just thought it might be worth mentioning.

I did not know that. Cheers.

Did they give up on the ice tech thing?

just in case anyone's after 203mm centerlock, merlin has SLX RT64 rotors for a tenner.

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<div class="bbp-reply-author d-flex align-items-center flex-wrap"><span class="bbp-author-name">HoratioHufnagel</span>
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Did they give up on the ice tech thing?

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No, but it's only available on the XT level RT86, and the XT and XTR groupset versions.

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Eh ?

Thanks. Purchased.

Was looking for a big front rotor - cheers!

Ordered. Thanks for the heads up.

Those Centrelock rotors - are they the ones that use the cassette tool or the ones that use the BB tool? Google isn't helping...

Just in time  I bent my front on a rock Wednesday  . Thanks

I think they can use either lock ring, the BB-tool lockrings are just for through axle hubs, and usually come with the hubs.

Excellent PSA, I jumped in at 3. Now doubled in price.

Could you please explain to me the difference between floating and 2 part solid rotors and their benefits/weaknesses. I honestly didn't realise this was a thing.

My pair turned up £27.98 bargin . I was more excited over the two 10p packets of haribo .. double Monday Win

Those Centrelock rotors – are they the ones that use the cassette tool or the ones that use the BB tool? Google isn’t helping…

@trusty shimano suggests BB tool.
Shimano tech doc

@trusty shimano suggests BB tool.
Shimano tech doc

The lockring and tool is dictated by the hub, the rotors are all the same.

e.g. DT BB lockrings don't fit Fulcrum hubs with BB lockrings as one has an internal and the other an external thread, which also means you can't run DT 6-bolt adapters on them. But any SRAM or Shimano center lock rotor will fit them.

Could you please explain to me the difference between floating and 2 part solid rotors and their benefits/weaknesses. I honestly didn’t realise this was a thing.

2-part rotors are just lighter than 'normal' ones. Probably a bit stronger and stiffer too.

Floating ones as above, but resist warping, which is an issue in MotoGP, not really in MTB.

eulach
Full Member

Could you please explain to me the difference between floating and 2 part solid rotors and their benefits/weaknesses. I honestly didn’t realise this was a thing.

So basically floating rotors have some float- the braking surface can move a little on the carrier. These 2 part ones don't have any float, the braking surface is solidly mounted to the carrier. It allows for a bit more expansion/contraction in the braking surface, which gets much hotter than the middle so usually you get a lot of difference in expansion between the outside edge and the centre. But a floating rotor uses that float to allow the outer braking disc to move and expand, while the inside doesn't, avoiding that stress. OTOH it adds complexity and a little weight compared to a fixed rotor.

Real floating rotors are something you mostly see on motorbikes, sometimes on cars, they're pretty rare on pushbikes. Hope have done them for a long time. Some cheaper brands do 'em though a lot of the claimed "floating" rotors on the market actually have zero float.

In practice, I couldn't tell any difference except that my Hope ones went rattly, so I returned them and the replacements went rattly too, so I got some solid rotors instead. But they did look lovely and tbf that's mostly why people want them.

Thankyou, Northwind.

Cheers, they had the right serial numbers but the pictures threw me showing the other lockrings. I've ordered a couple anyway to have as spares, can't not for a tenner an end!