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I have a DT Swiss AM1800 wheelset (2012 I think) that needs replacement bearings. From bit of Googling it appears these use DT 350 Hubs which has a maintenance guide here http://www.dtswiss.com/Resources/Support/HUBS/DT-Swiss-Hubs-350-Technical-Manual
From that it looks like I need some 6902 bearings (Ø15/28x7mm).
I've not bought bearings before but can I assume that as long as I get the right size it doesn't matter where they come from? Or should I be going with direct replacements http://dtswiss-onlineshop.de/index.php?page=product&info=133?
Standard bearings will be fine(make sure they have a 2RS suffix),from any bearing supplier. SimplyBearings or KaTec always get recommended, or Hope if you want to use stainless jobbies.
Make sure you don't go cheap!!
I paid nearly £50 for SKF (pretty much as good as it gets) for my Hope Bulbs. Well worth it though difference was night and day
Well worth it though difference was night and day
What exactly was the difference?
I go cheap. Just bought 10 of this size for around £15 off eBay. I don't mind a strip and rebuild once a year and the 6902 size fits lots of hubs. At this price it's a consumable, and a good excuse once a year to regrease the freehub.
make sure they have a 2RS suffix
What's the significance of the 2RS suffix?
I have half-a-dozen suspension bearings that will need replacing they're all 6800 RS at the moment
Ta
2rs means rubber seals both sides.
RS signifies a rubber seal, 2 says it has one on each side. Bearings are available with no seals, 1 or 2 seals, or 1 or 2 shields, 2 seals being the most suitable for the conditions we generally ride in.
Rs = rubber seal
2rs = 2 rubber seals (ie both sides)
I'd not skimp on the bearings , especially as getting the ratchet ring out can be a pain
But then if it's the first time it's needed new bearings the odds of the innermost one needing done are slim to none,
Yes, on dt hubs removingg the ratchet ring needs special tools and some new swearwords. But the bearing held in by this is well protected and is probably not one that needs replacing. You'll probably find that only one or maybe two bearings actually need replacing, but the 3 accessible ones are easy to replace whilst it's in bits.
You must order 2rs, and pack lots of grease around them as an extra layer of waterproofing. The seals only give water resistance, not water proofing..
^ yep that hidden one does seem to last far longer.
I do tend to replace the other three then reassemble and see its all feels good before removing that ring
Had a bad week last week and broke two tools in two days