Yup..I bought my first ones at a skate shop.  The next ones I ordered online at a cheaper price...same size.  
Z 

     On Monday, July 27, 2015 10:16 AM, Alistair Bell <albell@shaw.ca> wrote:
   

 Are you sure?

I have some inline skate bearings that are not the same size as the door slider bearings.

Alistair

> On Jul 27, 2015, at 8:44 AM, zmaninco@yahoo.com wrote:
> 
> Hi all,
> 
> Those bearings are the same size as the bearing used for skateboard and inline skates wheels.  You can pick them up at any sporting goods store.
> 
> Z
> 
> Sent from my iPad
> 
>> On Jul 27, 2015, at 8:32, Alistair Bell <albell@SHAW.CA> wrote:
>> 
>> He noticed that the door felt a little rough and noisy. A couple of months ago we pulled the door and had a look (as well as cleaning and lubricating).
>> 
>> The worn out bearings were very obvious. One was badly rusted and the seals were gone.
>> 
>> These bearing act more like guides than real bearing bearings :). You know what I mean, they keep the door vertically aligned when opening.
>> 
>> I'd like to hunt up smaller OD versions and see if I can sleeve them with plastic or something to reduce the steel on steel noise.
>> 
>> Alistair
>> 
>> 
>> 
>> 
>> 
>>> On Jul 27, 2015, at 7:22 AM, Tyler Hardison <tyler@seraph-net.net> wrote:
>>> 
>>> Thanks for the heads up!
>>> 
>>> What are the primary signs that the bearings are wearing out?
>>> 
>>> --t
>>> 
>>>> On Monday, July 27, 2015, Alistair Bell <albell@shaw.ca> wrote:
>>>> The two 22 mm OD bearings that sit in horizontal position under the sliding door cover . I just replaced a couple on friends van. The originals were worn out, one of them very worn out.
>>>> 
>>>> Friend bought four online, around 2 bucks each. Double seal, deep groove bearings. OD 22mm, ID 8mm, thickness 7mm.
>>>> 
>>>> They sit on studs on the door mechanism, held in place by circlip. Circlips replaced by E clips.
>>>> 
>>>> Just a heads up, less expensive to buy the bearing by specifications rather than the VW part number (251.843.425A).
>>>> 
>>>> Alistair