I have had my Pugsley, Necro for a bit less than a year. I don't consider myself to be an abusive rider, but, I've noticed play in the bottom bracket already. I first felt it while peddling and confirmed that it is definitely the bottom bracket. The cups and cranks are not loose. Everything is properly tightened. There is back and forth play. Could it already be worn out? How often are you all replacing BB's on your fatbikes?
It s a Surly mr whirly crankset with the bottom bracket that came with the bike. Any thoughts? Also, any recommendations on a replacement BB?
I would take the crankset off, remove the BB cups, remove bearings and clean them, then re-pack them with grease. Tighten the crankset back up and see if it is better. I clean and re-grease my bottom bracket probably every 2 months.
I'll give that a try. I didn't know the bearings were re-packable. I thought they were sealed cartridge bearings.
There is just a little orange rubber seal over them, you can pluck it out with a sharp pick or something. I will actually soak them in degreaser and then spray them out really good with an air compressor and let them dry. The little plastic cover is the most annoying part to get off, the orange seal is easy. It's pretty easy to figure out though.
Its too bad. I have a commutor bike I have riden a lot, almost daily for years that has an internal cartridge square taper bottom bracket that I have never touched. It is still smooth as glass and tight. Had the Surly for less than a year and the bottom bracket is kaput? Doesn't seem right for a more expensive bike.
The MWOD I just bought (two months ago) for my Moonie came with Enduro bearings.
Mine has the enduro bearings as well... I've still had to clean and grease them. Not sure what the deal is... I do get the BB packed full of mud and snow, so that could be it too.
Originally Posted by Harvie
I used the Hope.
So which Hope BB do you use? I get confused on this. The ones that come with the MWOD don't come with a 100mm center sleeve... and it is the GXP type, right? So wouldn't any GXP type BB cup work? Like this one from Hope?
I ended up replacing the Bottom Bracket with a Race Face 100mm BB complete with the sleeve that was lacking in the Surley original equipment. When I removed the old BB I could feel the grit in the bearings. They must not be sealed very well. The new one was easy to install. I hope it keeps the grime out better.
I finally got around to pulling apart the original equipment cup bearings; here is what I found.
Underneath the plastic sleeves, the inner race surfaces under the sleeves were rusty. The non-drive side was the worst. A lot of grit was in the cartidge bearings. Rather than sealing water out, they seemed to seal it in.
After riding in wet sandy conditions, I was careful to gently clean and dry to the best of my ability, but it seems that trapped water was held in the bearings and between the sleeves and the inner races.
I hope the replacement bottom bracket does better. I'm thinking because the Race face BB has a full tube, that it should do better in keeping water out. I installed the new BB with a layer of marine greese everywhere that water might want to sneak in.
I’d gone through a few sets of Mr. Whirly bottom bracket cups, and managed to washer out one bottom bracket spindle. I’m running Race Face Atlas DH on my fatbike and Truvativ Howitzer on my other bikes… thousands of miles later, have only had to replace the bottom bracket cups once.
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