2022 - Rotor recommendations?

[Zomb1e]

I notice that all the chinese rotors seem to have less material in the breaking surface when compared to Shimano/Sram. Wouldn't that affect performance/heat dissipation and perhaps mean they wear faster?

Heat dissipation is mainly affected by the heat sink area - the more the area, the better is heat dissipation. So highly perforated rotors have great heat dissipation. I've used KCNC Razors for years without any overheating problems (on descends with less than 500m of vertical drop), and now using Chinese rotors of the same weight (107g @ 180mm, 76g @ 160mm) with the same result.
But breaking performance is affected by amount of material on the braking surface, so there is a compromise, as anywhere else in the bicycle.
And of course, the less the material on braking surface, the faster the brake pads and rotor itself will wear out.

[StiffWeenies]

I’ll keep an eye out.  I don’t see them onTaobao yet

M4, M2, CD-02 (CL) and CD-03 (6-bolt) in 140mm or 160mm are now available on Taobao for pre-order

180mm and 203mm versions are also coming

There will be flat mount hydraulic callipers under the XR series

[Fat Larry]

Heat dissipation is mainly affected by the heat sink area - the more the area, the better is heat dissipation. So highly perforated rotors have great heat dissipation. I've used KCNC Razors for years without any overheating problems (on descends with less than 500m of vertical drop), and now using Chinese rotors of the same weight (107g @ 180mm, 76g @ 160mm) with the same result.
But breaking performance is affected by amount of material on the braking surface, so there is a compromise, as anywhere else in the bicycle.
And of course, the less the material on braking surface, the faster the brake pads and rotor itself will wear out.

I thought so. I wonder how noticeable it'll be with the rotors i have ordered. What are you using now?

I see Kingstop make some rotors that look more conventional at a good price. May grab some of those if the IIIPros are not up to the task.

[Zomb1e]

What are you using now?

https://aliexpress.ru/item/1005003717342691.html
Not exactly these ones, but with the same shape as their "model 3"

Upd: https://aliexpress.ru/item/1005003246173815.html - these "19K type" are exactly the same as mine, but I've bought them a year ago much cheaper than they are now.

I will not recommend them for heavy and/or aggressive riders, but they'll be a good choice for average XC or DC bike.

[Fat Larry]

https://aliexpress.ru/item/1005003717342691.html
Not exactly these ones, but with the same shape as their "model 3"

Upd: https://aliexpress.ru/item/1005003246173815.html - these "19K type" are exactly the same as mine, but I've bought them a year ago much cheaper than they are now.

I will not recommend them for heavy and/or aggressive riders, but they'll be a good choice for average XC or DC bike.

Ah damn, i'm a heavy chap building an enduro hardtail. Those model 3's look to have a similar amount of material removed as the ones i have ordered. That said mine are 203mm so that may help. Guess i'll have to experiment.

[St0mpB0x]

The Onirii rotors from the previous page can now be found on Aliexpress.

https://www.aliexpress.com/item/1005004417663313.html?spm=a2g0o.detail.1000014.11.21032b9ejPrGsA&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.40050.281175.0&scm_id=1007.40050.281175.0&scm-url=1007.40050.281175.0&pvid=7fccaeb7-4847-4590-84ce-7d3e03026e45&_t=gps-id:pcDetailBottomMoreOtherSeller,scm-url:1007.40050.281175.0,pvid:7fccaeb7-4847-4590-84ce-7d3e03026e45,tpp_buckets:668%232846%238109%231935&pdp_ext_f=%7B%22sku_id%22%3A%2212000029114465885%22%2C%22sceneId%22%3A%2230050%22%7D&pdp_npi=2%40dis%21NZD%21%2140.58%21%21%21%21%21%402101c84d16580420381387778e9044%2112000029114465885%21rec

[Fat Larry]

Anyone know how the Onirii last? The IIIPros have plenty of videos around of them getting lose and rattling at the floating point. I ended up flipping them without using.

[1Sigma]

I think Onirii might have something right up your alley

They've contracted Stirling Design (designer of Niu Aero) to come up with these disc rotors that'll come in 140/160/180/203mm sizes with 6-bolt or CL mounting options. These rotors are supposed to be paired with the upcoming Onirii M4 and M2 post mount brakes for MTB. I guess this is also formal proof that Onirii are indeed working on proper mineral oil hydraulic brakes, hopefully we'll see a flat mount version of that 4 piston M4 calliper.

So, I found myself in need of centerlock rotors (situation eliminates the possibility of using 6-bolt plays adapters)
Saw these on AliX under the Onirii store.  Apparently they have stopped producing them altogether.
They can still be found under the Cactus brand, but I wonder what the story is behind why Onirii stopped making them…

[StiffWeenies]

So, I found myself in need of centerlock rotors (situation eliminates the possibility of using 6-bolt plays adapters)
Saw these on AliX under the Onirii store.  Apparently they have stopped producing them altogether.
They can still be found under the Cactus brand, but I wonder what the story is behind why Onirii stopped making them…

They're working on a new, lower priced design

[1Sigma]

They're working on a new, lower priced design

Thanks for the quick response!
Contemplating these or just the cheap IIIPRO ones

[frnchy]

They're working on a new, lower priced design

Very nice... hope they're thicker than the 1.6mm claimed width of the previous design

[Fat Larry]

I've flipped the cheap floating rotors i'd ordered after seeing reviews saying they start to rattle at the pins, as well as their low amount of material in the rotor itself + on the package they say not for Dh/Enduro use..  https://www.aliexpress.com/item/4001191926306.html?spm=a2g0o.order_list.0.0.21ef18028BRDsg

Picked these up instead, should have them next week. Reviews are good though i haven't seen anything specific to the harder side of mtb. They've got a more standard design and more material in the rotor with less cut out. https://www.aliexpress.com/item/1005004323711635.html?gatewayAdapt=4itemAdapt

The new Kactus look good. They're thickness is stated between 1.6 up to 2mm. Would be great if they're 2mm. Anyone tried them yet? Any rattles? How thick are they actually?

https://www.aliexpress.com/item/1005004323711635.html?gatewayAdapt=4itemAdapt

[hazzer19]

I can related to the issue with the pins becoming loose. I've been on these Deckas rotors for around a year now and they work ok, just a bit noisy with the rattle https://www.aliexpress.com/item/32964003633.html?spm=a2g0o.order_list.0.0.21ef1802TSybds

[Fat Larry]

I can related to the issue with the pins becoming loose. I've been on these Deckas rotors for around a year now and they work ok, just a bit noisy with the rattle https://www.aliexpress.com/item/32964003633.html?spm=a2g0o.order_list.0.0.21ef1802TSybds

What sort of riding are you doing with them?

[zxcvbnmjm]

The new Kactus look good. They're thickness is stated between 1.6 up to 2mm. Would be great if they're 2mm. Anyone tried them yet? Any rattles? How thick are they actually?

https://www.aliexpress.com/item/1005004323711635.html?gatewayAdapt=4itemAdapt

Saw these on AliX under the Onirii store.  Apparently they have stopped producing them altogether.
They can still be found under the Cactus brand, but I wonder what the story is behind why Onirii stopped making them…

looks like the onirii cd-01 and cd-02 were discontinued because they had some problems