Hi All,
I need to purchase some replacement bearings for Trampa vertigo trucks. I ride beaches and seem to be going through bearings fast despite my attempts to keep them clean.
I will purchase online but have two questions. Does anyone know which internal clearance rating is best for landboarding - eg C2, C3 or C4. I guess C3 (greater than normal clearance) but really have no idea.

Second, does anyone use ceramic bearings ? Are they worth the extra $$$ - I am interested in life time rather than speeeed.

SCRUB makes Stainless Steel bearings that might fit

can you not just repack the ones you have with marine grease? I do that and they last about a year.

My current set are over a year old and have been repacked several times. Two have develoeped internal damage, are noisy and dont run very freely.

There are plenty of good cheap online suppliers for double sealed deep groove at this size (6001-2RS for those who care about bearing prefixes) I just dont know which internal clearance rating is best: normal, C2 or C3.

I can email a supplier. Thanks.

Sigma, Internal clearance gets larger w/ usage,they generally start out tight and break in to a looser state. You don't want your wheels to get too much slop in them. Here is a link http://shop.mbs.com/mountainboard-parts/mountainboard-wheels...

Clearances are generally used to accomodate thermal expansion between internal and external rings or to quell noise/vibration. If clearance is not specificed, it is usually CN which sits between C2 and C3. There's plenty of other sources of noise and vibration for landboards and they generally don't spin up fast[*] enough to result in thermal expansion, so it's generally a moot point.

[*] Unless you are being towed by small aircraft or being chased by starving red pandas (they're relentless when hungry).



ATB,
Sam

Perfect, thank you very much.

Damn those starving red pandas, perhaps I wasnt hearing the noise of grinding bearings but grinding teeth. Now I know what that Bump, Yelp, Bump patter has been... :piggy: