Back Wheel.

[lavawater]

Right.

Riding home from work.. Came onto a island and felt a soft crunch, got strate off and as i was riding off the small "crunch" was happening at the same time untill i stopped.

Pulled over and started to have a lil look around my back wheen then i just randomly put my hand on it was tryed to "wiggle" it

It moved like 2mm(not much)

automatically i thought the "long bolt" was loose but it wasn't

Then 2 bikers stopped and started having a look and one of them said my "its your berings" i was like well what sould i do. My house was like a 5 min drive away so they said ride home on it around 15mph . So i did.

Gets home and me and dad have another look around and i can see where its moving , its on the right hand side in the center of my diskbreak and when i have the bike lifted up you can see the small circle hole
Picture's below.
The arrows's show the hole that move's

https://img88.imageshack.us/img88/3258/dsc01505qz7.jpg
https://img88.imageshack.us/img88/5075/dsc01506ng1.jpg
So the questions(s) are

What do you think it is?
Whats caused this?
What do you think i should do (im 16 and know very little about bikes)?

Thanks

[Jamie S]

Your wheel bearings have worn/collapsed, you need to buy a new set of rear wheel bearings (go to a bearing shop, should be no more than £5 each) and either fit them your self or get a garage/mechanic to do it for you.

[G]

As Jamie suggests; may have just been caused by old age, or water getting into them (failed seals).

Not a big job to do, though getting the old ones out can be interesting after they've collapsed.

Presuming you've got access to a car, it's probably worth trying to do them yourself, then taking the wheel to someone else if you can't... that way you'll save a bit of money on not paying someone to take the wheel of for you, at least.