2022 - Rotor recommendations?

[dsveddy]

Update on the new-design ONIRII 6-rivet floating rotors, which I ordered in 160mm & centerlock:

Last time I posted here I mentioned that when ONIRII sent me a message with a photo of my order, I spotted they had sent 6-screw rotors instead of centerlocks. I had messaged them back and they apologized for the mistake and directed me to purchase a 1-cent "shipping change" through them, which I went ahead and purchased.

A few days after ONIRII sent me a photo of my centerlock rotor shipment, and I've been waiting on those. From the photo, it looks like these are a bona-fide centerlock design and not a 6-bolt rotor with an adapter. They also demanded that I give them a good review for the good service, which I suppose I will give considering that their response to this mistake has been solid and it seems I am keeping the 6-screw rotors for free.

In general I quite like that ONIRII sends photos of the shipment and the shipment receipt (with your name and address on the receipt), which is helpful for ensuring that A) you are receiving the correct product and B) it's shipping to the correct address. It's a nice CS touch that I haven't seen from other vendors.

In the meantime, my notes on the 6-screw rotors, which I received last week:

The good:
-weight: 94g, basically on the money for quoted weight
-thickness is indeed just shy of 2mm. Can't get an exact measurement bc the battery on my caliper died, but I can see it's definitely thicker than 1.5mm.
-Nice clean machining and anodization on the spider. area of the 6-bolt interface is machined down to match the thickness of the rotor so the rotor aligns on the mounts correctly.

The bad:
-Rotor has a couple of burrs left over from cutting (laser cutting?)
-plenty of sharp edges. You probably want to file/grind the outer edge down for peloton use.
-and the big kicker...ONE OF THE ROTORS IS MISSING A RIVET. Huge mistake from them. Basically sent me a useless rotor. The fault was visible in the photo they sent me earlier, which is good. Thankfully the replacement rotors they are sending have all the rivets. Anyways given how they've served me as a customer, I have no doubt they'd make it right if you were sent a rotor with a missing rivet, and you'd have the opportunity to catch it before they even ship. But it's something to keep in mind if you're ordering floating rotors from any of these AE vendors.

[federic000]

Is this the new onirii rotor?

€ 30,30  30%OFF | ONIRII Bike Rotor160mm Centerlock 6 Bolt Disc Brake Rotor Heat Dissipation for Road , MTB XC / Folding / Touring Bicycle NEW
https://a.aliexpress.com/_EGAtVOv

[dsveddy]

Is this the new onirii rotor?

€ 30,30  30%OFF | ONIRII Bike Rotor160mm Centerlock 6 Bolt Disc Brake Rotor Heat Dissipation for Road , MTB XC / Folding / Touring Bicycle NEW
https://a.aliexpress.com/_EGAtVOv

Yes that is the one I ordered!

[00Garza]

Is this the new onirii rotor?

€ 30,30  30%OFF | ONIRII Bike Rotor160mm Centerlock 6 Bolt Disc Brake Rotor Heat Dissipation for Road , MTB XC / Folding / Touring Bicycle NEW
https://a.aliexpress.com/_EGAtVOv

I guess I'm primarily a bargain hunter, so at that pricepoint why not just get shimano or sram rotors? Are these ultra weightweenie rotors?

[dsveddy]

I guess I'm primarily a bargain hunter, so at that pricepoint why not just get shimano or sram rotors? Are these ultra weightweenie rotors?

In terms of weight, they are pretty much the same as MT800 coming in at 101g w/o lockring, 112 with lockring.

I'm not sure what the price difference is for you--I know Europe gets lower prices on Shimano parts and higher VAT on Chinese imports compared to the US. I paid $55USD total for the ONIRII rotor pair, while the cheapest 160mm high-end Shimano rotors (like MT800 or CL800) that I can find are at least $50USD each. So for me it comes out to around half the price.

I saw that you might be paying something like 33 euro each, and there are MT800/CL800 rotors available in europe for around 40 euro or less, is that correct? If that's the case, then of course the ONIRII rotors make no sense.

[coffeebreak]

This is true. Shimano stuff is comparatively expensive here. I frequently check Merlin Cycles even though I am in the US and they certainly have better prices on Shimano stuff but shipping across the pond kills any savings unless you order upwards of $500? I could never figure out how their shipping costs work. Right now they have great price on Ultegra R8000 full group and when added to cart shows free shipping to USA + no tax.

Wiggle has quite reasonable shipping to USA but they don't have much of the stuff. Either that or their low prices are applicable only to a particular slow selling variant of a product.

[federic000]

I guess I'm primarily a bargain hunter, so at that pricepoint why not just get shimano or sram rotors? Are these ultra weightweenie rotors?

Definitely too expensive, at the price lever of those we can get ashima's or galfer's , as well as Shimano even if not so light but hey it's a Shimano

[coffeebreak]

An update on ZRACE rotors that they were blowing off at $5 a pop during last 11/11. As of yesterday they are on 3rd bike and 4th set of pads but no dice. Here are the pads that I tried - OG Onirii, Cooma/Delt, TRP, Tektro. Currently they are on my Salsa with Tektro pads and same poor performance continues that started with my VB GF002 months ago. I almost gave up on Onirii BR005s thinking the calipers were shite but no! The rotors are shite.

I honestly didn't think the rotors were culprit and blamed it on pads and calipers. Just going to stick to Shimano (even used ones on Craigslist feel better) or if someone has better options on the cheap let me know!

[Fat Larry]

Which ones and whats wrong?

[coffeebreak]

These: https://www.aliexpress.us/item/3256804147936070.html

Just no strong "bite" even when dry. Brand new but give a feel like they need to be replaced.

[kubackje]

Update on the new-design ONIRII 6-rivet floating rotors, which I ordered in 160mm & centerlock:

Hey bro any updates on those new design rotors ? I am looking for some lightweight rotors and considering those as they're way cheaper then galfer

[dsveddy]

Hey bro any updates on those new design rotors ? I am looking for some lightweight rotors and considering those as they're way cheaper then galfer

Uhh they're ok. I'm still riding them over a year later. Not so zooted about them but they're fine. I judge they don't have great traction at the pads, even when bedded in. I'm having better results with ceramic pads, but they definitely sacrifice some traction, discs with more surface area are much better. My biggest complaint is the rivets eventually start to go loose, which make them super noisy. I've been able to fix the issue by re-peening the rivets by smashing them on a vise anvil with a hammer, but there's only so many times you can do that before they go brittle and break catastrophically.

They're like 1/4 of the price of galfers right? Expect about half the quality & performance in terms of braking performance and durability. So maybe you're getting double to 50% more value out of them compared to Galfers, if you can tolerate the crappy performance.

I live in the Boston area if that gives you some frame of reference for the terrain I deal with. I get satisfactory performance going down big hills, criterium racing, and riding in groups. But I haven't really tested them much on real mountains.

[kubackje]

Uhh they're ok. I'm still riding them over a year later. Not so zooted about them but they're fine. I judge they don't have great traction at the pads, even when bedded in. I'm having better results with ceramic pads, but they definitely sacrifice some traction, discs with more surface area are much better. My biggest complaint is the rivets eventually start to go loose, which make them super noisy. I've been able to fix the issue by re-peening the rivets by smashing them on a vise anvil with a hammer, but there's only so many times you can do that before they go brittle and break catastrophically.

They're like 1/4 of the price of galfers right? Expect about half the quality & performance in terms of braking performance and durability. So maybe you're getting double to 50% more value out of them compared to Galfers, if you can tolerate the crappy performance.

I live in the Boston area if that gives you some frame of reference for the terrain I deal with. I get satisfactory performance going down big hills, criterium racing, and riding in groups. But I haven't really tested them much on real mountains.

Thanks a lot for a very comprehensive answer bro. I am currently riding dura Ace rotors but last week was in the mountains and they wobble under heavy load. Also after just 5k they show wear and almost at 1.6 ... But I think I will go with the galfers for a peace of mind before my trip to the Alps in September.

[dsveddy]

Thanks a lot for a very comprehensive answer bro. I am currently riding dura Ace rotors but last week was in the mountains and they wobble under heavy load. Also after just 5k they show wear and almost at 1.6 ... But I think I will go with the galfers for a peace of mind before my trip to the Alps in September.

Yeah for a trip to the Alps I would say the ONIRIIs--or honestly any weight-weenie rotor--are definitely a no-go. I would check the thread on WW for discussion on what to get: https://weightweenies.starbike.com/forum/viewtopic.php?f=3&t=145230&start=705

seems that most users there are recommending a rotor from campy, shimano, or SRAM, and feedback on the galfer waves seems to be mixed.

[kubackje]

Yeah for a trip to the Alps I would say the ONIRIIs--or honestly any weight-weenie rotor--are definitely a no-go. I would check the thread on WW for discussion on what to get: https://weightweenies.starbike.com/forum/viewtopic.php?f=3&t=145230&start=705

seems that most users there are recommending a rotor from campy, shimano, or SRAM, and feedback on the galfer waves seems to be mixed.

I'll just order a new version dura Ace rotors and call it  a day. They just look the best anyway .