Hi, anyone know where i can buy Bell Super mtb helm?

I think you may get the size confused. It is nit bb51. It is 68/73mm and compatible with both 68/73 mm bb frames. You wont have the problem. You can measure it on the frame to make sure though.

i think u got confused la. 135mm is the hub width/spacing. 9mm is the normal QR

Er... I'm not a big techie on BB but I think your SM-BB-51 is a model for Deore Bottom bracket and not some 51mm size. 68 or 73mm refers to the width of the BB shell on the frame. That Deore BB outboard bearing interface uses English threading. Not sure what Euro threading means... clarify with the frame manufacturer first. Not sure if Shimano has a BB threading to fit it. Check with bike shop.

Problem Solvers - BB Standards Guide
Shimano BB techdoc

Yup.

Just wanna add something, 9mm usually is for the front fork. For the rear, it's 10mm...

Ummm, if the BB breaks, I think you would have a wobbly crank... imho, dangerous...

well u can keep using it, n see if the mechanic/cyphereza is right.

the bearing is already damaged, just that it hasn't caused major failure yet. change it now before it affects other parts

better safe than  sorry. replace lo! time to bling it up! haha

time to poison

have u seen how smooth ceramicspeed bb spins?

run it on some more. if it still squeals like the pig in Deliverance than replace the pads and wipe down the rotor with alcohol. the latter always works 

Pharmacy

new pads are sintered or resin?

try cleaning the pads and rotors first. i had similar problem, stock resin pads came with the bike. changed to sintered, not as noisy as before.

http://www.pinkbike.com/news/Tech-Tuesday-...Brake-2011.html

i just wipe the rotors with alcohol n paper towel. and then clean the pads with alcohol and sandpaper them a bit.

so far in pharmacies, i could only find methyl spirit. not recommended. best is to use isopropyl alchohol (rubbing alcohol). not sure if u can find it in the pharmacies. that's what i'm using now.

http://singletrackworld.com/forum/topic/me...-or-isopropanol

or u can use the brake cleaner like cyphereza suggests

btw, do u wash ur bike with car shampoo or the likes?

Bro, easier to just grab a can of Brakleen with Jet muzzle at Ace Hardware. Just spray the rotors and pads, and then leave it to dry. Don't need to wipe.
Costs around RM11 IINM.

ace hardware?

Deore alone is oredi 1k