Starting my fourth season on the 936 and during the process of upgrading the bottom bracket I noticed some rust on the old cups. The bearings never got contaminated and still spin great.

As part of this BB swap I am going to drill a 1/7” drain hole. I don’t ride in the mud except for two races over the last two years. I rarely need to wash my bike, outside of the two races I maybe hose down the frame once per year. I’ll probably start to cover all the cable entry points with rags or tape when I wash going forward.

I just ordered a Walgun BB92 DUB Ceramic from AliExpres. Anyone try these out? Search results were zilch.

https://www.aliexpress.com/item/3256805435639225.html

Hi guys
Where to find 8x30 bushings? They seems to be unavailable anywhere

They have several colors of the needle setup and DU setup, but not black in needle.
https://www.enduroforkseals.com/products/rear-suspension/shock-eyelet-bearing-kits/6mm-8mm-thru-bolts/NEEDLE-BEARING-30.html?ucacid=1237670655.423665

https://www.enduroforkseals.com/products/rear-suspension/shock-eye-bushing-kits/DU-BUSH-33.83-8.html?ucacid=1237670655.423665

Got the 155 Specialized Power Pro Mirror clone off Ali for $90 shipped.

Looks very similar, difference is carbon rails on the Ali one vs Ti from Spesh. Ali version is lighter.

Need to install it and get feedback from wife…

Great looking option but be aware that the rear brake mount is the same as the M016 frame so some calipers will not work. For Shimano, SLX and up will be fine but some of the cheaper ones, M6000 in particular, have a bleed port casting that hits the frame.

An M6000 brake on a 800g frame seems like an oxymoron.

I’d look for a set of used Level TLM Ultimates for a budget build.

Not sure if it would have helped but I use the Nukeproof down tube protector.

Here is the frame protection order I placed at Chain Reaction.

Everything was going great till the bottom bracket started to separate from the frame. I had 2 events that may have contributed to it. 1) A pedal strike, not an especially hard one or anything. 2.) An end over wreck off a drop. Not sure how it could have affected the BB though.

Carbonda has been somewhat responsive. They have not offer to replace it or a discount on a new frame. They have offered to analyze the Frame if I ship it back, but that may be cost prohibitive. Cheapest ups shipping of the lower section of the frame is $134. I have sent more detailed pictures and am currently waiting for Wing to respond.

Carbon failure is typically caused by impact and a pedal strike could definitely transfer enough force into the BB threads to challenge the carbon. Unlikely, because most pedal strikes are absorbed by the body. I’ve had 20-30 pedal strikes and have broken the carbon body on pedals twice, but I’ve never considered the frame at risk.

Another consideration with threaded BB is cross threading or misaligned threads. Did you have the frame prepped with facing/chasing the threads to ensure alignment? I doubt this would cause such fast failure.

The crash referenced is likely the culprit. The bike does crazy things during a wreck. But, you would have heard something or felt it if you were still on the bike. I’ve punctured the top tube with the shifter high siding a berm, cracked the chain stay trying to ride through a rock garden, and cracked a rim when a loose rock kicked up off my buddies tire.

All of these events I knew right away there was carbon damage due to the sound.