I would like to order some rotors for an enduro build and after a few searches on here i'm unsure of what to order.

I'm fairly new to mtb and rotor brakes so don't really have a point of reference to compare anything i might order from Ali.

Any suggestions? I know i want 203 or 220mm.

Anyone know of a company that sells thicker rotors? I have an mt5 calliper i'm using on this build and read they use slightly thicker than normal rotors.

Ztto seem to have mixed reviews.

Do i need floating? Do floating rotors fail at the joins?

Thanks.

I bought the ztto floating rotors in 160 and 140mm. They do seem thicker, even after alignment with spacers so that they fit centered between my brake pads. The 160 had a minor wobble which I corrected by gentle bending with my hand. I also had low speed brake shudder which went away after 10 miles of road riding.

Overall I wouldn't buy again simply because the solid steel rotors are plenty for me. But if I had to buy floating rotors, I would buy ztto again. Floating rotors do not have any history that I've read of failing. Also the ztto rotors are identical to differently branded rotors I see from Western bike retailers.

My experience with smaller rotors could easily differ from others experiences with the larger ones. More chance for a bad wobble to occur when bigger.

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.

Interesting. Nice looking rotors.

Are those cable actuated hydro brakes? How are they?

Quote from: Fat Larry on April 11, 2022, 07:08:36 PM
Interesting. Nice looking rotors.

Are those cable actuated hydro brakes? How are they?

The BR-05 callipers in the second picture are hydromechanical, I can't comment on performance because I've never tried them before but they seem to be the best hydromechanical option after the Juins which are 2-3x the price depending on model. The M4 and M2 appear to be proper mineral oil hydraulic and the M4 lever/calliper design itself looks to be very Trickstuff/Hope RX4+ PM inspired, but I'm not too knowledgeable on MTB brakes and could be totally off here.

Like the look of those m4 brakes, any indication of release?

Quote from: Icyseanfitz on April 11, 2022, 11:46:17 PM
Like the look of those m4 brakes, any indication of release?

No idea but definitely not anytime soon considering the manufacturing and logistics situation right now.

Quote from: StiffWeenies on April 11, 2022, 12:42:57 AM
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.

Any idea where i can get those rotors? Can't find them on Ali. Are they not out yet?

Quote from: Fat Larry on May 01, 2022, 04:40:19 AM
Any idea where i can get those rotors? Can't find them on Ali. Are they not out yet?

The 140/160mm CL/6-bolt versions should be released soon domestically on Taobao. The model names are CD-02 and CD-03 respectively

Quote from: StiffWeenies on May 01, 2022, 05:54:34 AM
The 140/160mm CL/6-bolt versions should be released soon domestically on Taobao. The model names are CD-02 and CD-03 respectively

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

I couldn't wait and ordered some random floating Rotors which it seems a few brands on Ali are putting a lable on. Hopefully they're not garbage.

https://www.aliexpress.com/item/4001191926306.html?spm=a2g0o.order_list.0.0.83231802HmbhyM

Was tempted by the version with cooling areas added but i have no idea if they're a gimmick or not.

https://www.aliexpress.com/item/32947453001.html

Can report back if anyone's interested but bear in mind i have minimal experience with disc brakes so it'll likely be limited to: They seem to work good or they don't work at all/fail catastrophically.

I wanted centrelock but didn't find many cheap rotors, so ordered some six bolt adapters from Sensah. Again another potential failure point, which is suboptimal.. fingers crossed i guess. 

Quote from: Fat Larry on May 07, 2022, 08:17:45 PM
I couldn't wait and ordered some random floating Rotors which it seems a few brands on Ali are putting a lable on. Hopefully they're not garbage.

https://www.aliexpress.com/item/4001191926306.html?spm=a2g0o.order_list.0.0.83231802HmbhyM

Was tempted by the version with cooling areas added but i have no idea if they're a gimmick or not.

https://www.aliexpress.com/item/32947453001.html

Can report back if anyone's interested but bear in mind i have minimal experience with disc brakes so it'll likely be limited to: They seem to work good or they don't work at all/fail catastrophically.

I wanted centrelock but didn't find many cheap rotors, so ordered some six bolt adapters from Sensah. Again another potential failure point, which is suboptimal.. fingers crossed i guess.

IIIPRO shouldn't be too bad. They co-develop the BR-05 hydromechanical and upcoming M4 hydraulic calipers together with Onirii and Onirii themselves used to bundle those floating rotors with their brakes before they came out with the CD-01.

and good eye spotting the cooling fin version! I wonder if they're any thicker/beefier than the standard ones?

I've been using these lightweight Deckas rotors https://www.aliexpress.com/item/32964003633.html?spm=a2g0o.order_list.0.0.29ba1802DilydJ with 6 bolt hubs and when I switched wheels I got these adapters https://www.aliexpress.com/item/4000260123765.html?spm=a2g0o.order_list.0.0.29ba1802DilydJ and they have been working great in 6 bolt and Center Lock set up.

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?

IF they are indeed thinner that means they will get to an unsafe thickness faster. Performance (however you wish to define that) and heat dissipation of a thinner rotor with all else being equal will likely be lower. Would you notice the difference? Probably not.