Rockbros carbon cranks feedback?

[vanbc]

If anyone here has experience with rockbros carbon cranks please share.
Thanks very much

[00Garza]

They’re pretty new, so might be a while til we get real world experience with them.

[toxin]

They're the same as lexon cranks, which are basically the same as cybrei cranks

[Trackar]

Just got my set, will report on them once on the bike. Finish is nice on them and don’t expect to have any issues. I might just sand them and then clear coat as I don’t love the logos.
315g for a 162.5 set

[OralMaster]

They're the same as lexon cranks, which are basically the same as cybrei cranks

if joegal likes this post imma cop one immediately

[Sander2177]

Been told that Cybrei is not made in same factory however it is clear they are all using the same design 
I considered these cheaper brands RockBros and Lexon but I have gone with Cybrei, lots of race teams using also Pogacar using them on his TT bike plus customer service

[dustedrob]

Any long term feedback on these cranks?

[dsveddy]

Bought a set in 165mm during the anniversary sale. I paid under $403 for a set with an xcadey PM, kind of an impossible to beat deal especially with the impending demise of the de-minimis exception in the US.

Anyways, 327g. Judging from the weights I've seen on here and on the Aliex reviews, there seems to be ~5g of variance from unit to unit. Compared to the other 2 165mm cranks posted to AliEx reviews, my unit is the heaviest, but only by 5g compared to the lightest. No biggie.

First impressions: Rockbros did not spend much on packaging/unboxing experience, which honestly I see as a good thing. Wall thickness on the spindle is THIN. I hope not too thin. It's clear they've saved lots of weight on the spindle in this area. Whoever designed this was clever in that once you get leftwards beyond the part of the spindle that sits in the bearings, the diameter of the spindle tapers out to a much bigger diameter to form the crankarm bonding interface. This interface is bolstered by a large-diameter (like 35mm) flanged ring that threads into the inner surface of the spindle, and the flange buttresses the outer surface of spindle-circle on the left crankarm

This seems like a very different design to the lexon, which appears to use a smaller bolt to secure/bolster the left crankarm attachment to the spindle, and may even have a detachable left crankarm. If the carbon crankarms are really the same as they appear to be, then this difference in spindle interface design likely accounts for the weight difference.

[LazyCyclist]

I have Cybrei, Lexon, and Rockbros. I would suggest going with Cybrei if you can afford it - overall, the quality of each part seems higher.

[dsveddy]

I have Cybrei, Lexon, and Rockbros. I would suggest going with Cybrei if you can afford it - overall, the quality of each part seems higher.

I find it unsurprising a product that costs twice as much is higher quality than the cheaper one.

[LazyCyclist]

Sure. It's not twice (in my case, Cybrei cranks were even three times more expensive) as good, but it's still better. Considering that cranks are something likely to migrate from bike to bike, it's probably worth paying a bit more. By the way, based on the weight, you're most likely using the 29mm version, not the 24mm one. There isn't a significant difference in axles between the Lexon and Rockbros 24mm versions.

[Serge_K]

Sure. It's not twice (in my case, Cybrei cranks were even three times more expensive) as good, but it's still better. Considering that cranks are something likely to migrate from bike to bike, it's probably worth paying a bit more. By the way, based on the weight, you're most likely using the 29mm version, not the 24mm one. There isn't a significant difference in axles between the Lexon and Rockbros 24mm versions.

Which is lighter? Back in the day, Sram red w 30mm spindles was lighter than sram red w 24mm spindle. Is it still the case that the wider spindle weighs less?

[LazyCyclist]

29mm is ~35-40g lighter.