[IH8Rice]

i bought a King 68/73 BB and was curious on how i can use it for a 83mm frame.
when i called them up to ask about buying a sleeve for a 83mm BB, they said they dont make one in that size because "83mm frames are different than 68/73 frames."

ive dont this with Race Face bb's and have had no issues (since they obviously make 83mm BB's.)

this is what that sleeve looks like.........any ideas?

 

[NY_Star]

Sounds like it's time to make friends at a local machine shop.

 

[IH8Rice]

Sounds like it's time to make friends at a local machine shop.

my friend has a mini-machine shop in his garage, but this thing is plastic....i guess it could be done in aluminum. it does have 3 o-rings on it too

 

[HAB]

It's just there to be a dust seal. You could

a) Leave it out and not care
b) Try a couple from say, Shimano, RF, etc and see if one happens to be the right length

I'd try b) if you have any lying around, but I wouldn't put any effort towards it. If you don't have a working one on hand, go for a).

 

[buckoW]

I rarely run the tube seal on any of my bikes. Make sure your bb shell is drilled for the water to get out though.

 

[SuspectDevice]

No need for the sleeve. I've used the King BB on a few 83 frames recently. No prob.

 

[IH8Rice]

ill try a Race Face 83mm sleeve that i have, but i doubt its going to work. the CK sleeve fits into the cups a bit different than the RF's or Shimanos.....

i think ill just try it without the sleeve and drill a drain hole in the the frame.

thanks all!

 

[gonefirefightin]

I have always drilled a small hole in the bottom of my BB, its seems the sleeves really dont do much other than hold moisture.

 

[BmxConvert]

A 68/73mm FSA MegaExo sleeve fits perfect and sets the cups at 83mm.
We've got a few guys running that setup around here for 6 months now and it's working just fine.

-Kevin

 

[IH8Rice]

A 68/73mm FSA MegaExo sleeve fits perfect and sets the cups at 83mm.
We've got a few guys running that setup around here for 6 months now and it's working just fine.

-Kevin

a 68/73 sleeve works for 83mm?

 

[ire]

It's just there to be a dust seal. You could

a) Leave it out and not care

I rarely use the sleeve on my bikes. Increases the maintenance after a wet ride though

 

[kemosabe83]

just have kris machine that piece, 3 groves for o ring seals is easy to make

 

[IH8Rice]

just have kris machine that piece, 3 groves for o ring seals is easy to make

id need the right length for the tube too. im just not going to use it.

im sure itll be easy to make, but a aluminum sleeve isnt necessary

 

[leprechaun]

Hey guys keep in mind that since it's grease gun compatable. In order to do so the back side of the bearing is not fully sealed with a rubber gasket normally associated with King bearings. There is a nylon washer that's fit tight up against the backside of the bearing so that under pressure the grease can get in, and out the front seal. Water could be able to get in without the spacer. Therefore the spacer tube IS a seal. Use the grease gun often if the spacer isn't used! I have a King BB, a 73, i haven't tried to fit another brand's spacer tube in there but it's a good idea to try to mod it to fit!!

Krispy

 

[IH8Rice]

Hey guys keep in mind that since it's grease gun compatable. In order to do so the back side of the bearing is not fully sealed with a rubber gasket normally associated with King bearings. There is a nylon washer that's fit tight up against the backside of the bearing so that under pressure the grease can get in, and out the front seal. Water could be able to get in without the spacer. Therefore the spacer tube IS a seal. Use the grease gun often if the spacer isn't used! I have a King BB, a 73, i haven't tried to fit another brand's spacer tube in there but it's a good idea to try to mod it to fit!!

Krispy

yeah i noticed that washer inside the cup. i guess having to inject moar grease in there is something ill have to live with to use it in a 83mm frame.

why cant they make one for a 83mm frame?? whats so different w/ the sizes?

 

[Westy]

They just might not have the machines with the capacity to make a longer sleeve.

 

[leprechaun]

They just need the demand for it, it will probably come eventually.

 

[IH8Rice]

They just need the demand for it, it will probably come eventually.

the guy i talked to started talking about the loads being different on a 83mm compared to a 68/73mm and how its "different" than a normal mtb setup.
i started zoning off mid-way through the conversation