About 3 months ago, i bought some ceramic balls 1/8" for my ball diff on ebay from a seller from macau. at first they ran really great, my diff was really smooth. But lately i felt like there is something wrong with them, as if the balls have worn down in diameter, causing the diff plates to touch the diff housing, intstead of the balls seperating the diff plates apart. i tried flipping the diff rings to the unused side but seems to be the same. i tried measuring the balls on a caliper, but cant get a super acurrate reading cause my caliper isnt digital. 1/8" is 3.125mm
then i installed back my old carbide diff balls, which are at least a year old and ferequently used before , and the diff rings dont feel like they are rubbing the pulleys anymore. i wonder if there are fake ceramic balls out there, that are made of different materials that doesnt magnetize and is black in colour, or perhaps these balls are ceramic but of lower grade hardness?
Any experience you guys have with ceramic balls quality issue, please give your experiences and 2 cents worth.
Thank you.

yep brought same diff balls from same seller didnt last 1 race meet
waste of time. i think u get what you pay for

anyone know of some decent brands/sellers

Speedzone Differential Balls

thanks i will keep that link. i just got some ACER ceramic nitride diff balls
hopefully they hold up

Team Associated also sells ceramic diff balls.

Yes please inform us about this I have been having some similar issues.

I got a set from ABEC35 a while ago which were great but with recent orders the diff has lasted 1 meeting only. It could be that the power we have now is much more than just 1 or 2 years ago (1/10 stock TC), which it is, or that the quality of the ball is not good. I don't know which is the answer.

Some of the guys running the T3'11 at my club have suggested that the diff plate material on recent xrays is poor and the diff doesn't last, and if they use the old T3 diff the problem disappears..

I prefer the feel of the ball diff over the gear diff and don't want change but the reliability seems worse than before.

I get 3 or 4 runs with the 417, 20 runs with the T3'11

I've been running Black Pearls from Blackbeard for about a year now in my B4.1. Still real smooth.

http://www.blackbeardrc.com/store/

Strong, light, cheap - pick two.

If a deal looks too good to be true, then it probably is.

I use RC4Less items in my 12th car. I am still on the original set after two seasons...

http://www.rc4less.com/product_info....0ae2bd54ad8146

...and so is everyone else who bought them. Wouldn't recommend anything else. Full details on the link above. HTH

Click here for AVID. Great quality, great service, great prices.

I buy mine from axiom racing, before they would have buy a dozen get a dozen free> i've been using them for quite some time and they are still as smooth as butter. I would say they have some HARD BALLS.

do axiom, avid and Rc4less sell on ebay? i would prefer to buy from ebay. thanks guys.

not sure how the ACER compare for quality (so far very good) but they were free shipping (good when your a tight wad)

Not sure, but with most of them, you can check out with PayPal, which provides more than enough protections should anything go wrong.

just bought 2 packs of 12 ceramics 1/8" from ACER..will be 2 weeks before they come, lets see how long they last !