How to Upgrade Bottom Bracket to Sealed Bearing (6903 2RS)

HACK, just buy a sealed bottom bracket.

Pwedi bang Tagalog kuya?

Goods din ba iyan Sir sa 20rs ? Surplus Folding Bike ?

meron b pang hollow tech n bb?

This is useless because masisira yong mga cups kasi ang mga cups d compatible sa bearing tsaka yong bearing d magtatagal masisira din... walang kwenta to...

Sukat to sa ixf bb?

From his example of repacking the caged (not loose) bearings, grease must very expensive where he is located. Small wonder he wants to replace his ball bearings with anything. Little to no grease is a recipe for troubles

lods anong bottom bracket yan?

You can just change it to sealed bearing BB unit. The process will be more simpler and less maintenance

Nice experiment, but It'd be a far better idea to simply replace with a purpose designed sealed bearing bottom bracket. What you did there fucks up your chainline completely.

pwede ba to sa vintage bikes na walang thread?

Hi. Was the chainline not at all affected by this conversion?

Somewhat ok idea, terrible execution. You don't have enough thread engagement of the cups in the shell. This WILL lead to damaged threads on the frame. If you really are dead set on doing this conversion, go to ebay, your local used bike shop, or bike co-op and find a spindle with a similar overall length but shorter span between bearing races. Alternatively you could grind down both spindle bearing races and press fit a sealed bearing in their previous locations. The quickest, easiest, cheapest, and best option is to buy 11 new loose bearings for each side and pack them in a quality marine grease.

Nice

I think much better solution is to install cartridge instead old shaft with two bearings. Yes, this is much more expensive but once you install a cartridge and you will forget about this problem forever.

Does it come with pedals?

pwede ba sa Japanese bike yn?

Sealed bearings aren't menat for use with loose bearing cup races. The bearing system in a bottom bracket with cup and spindle is meant to be a floating bearing system. The bearings themselves are not meant to be fixed in a non-moving position, which creates more friction by not doing the job of handling axial loads. You wind up having to actually do more maintainence due to quicker bearing wear due to friction because the bearings won't float in straight line anymore and will move side to side in the cartridge, because of the fixed position in the cup. This is why bearing races in loose bearing systems are rounded, including the spindle edges, which is also going to wear out the bearing cartridge, because it's not designed like a flat spindle, it has a rounded concave step meant to be an inner bearing race.

Ano Po tawag sa bike na gamit nyo para Po Kasi women's bike na convert to road bike

Idol san ka nakabili ng handlebar mo?

san mo nakuha tools mo?

Wow! Amazing! Not like a jerk or a team of them screwing around with people's minds for sales and busting thin air! Anyway!

Bad so see this video. Do you know why we have different bearrings? Axial and radial... Use your brain man.

Just buy a sealed cartridge bottom bracket.

turn that awful annoying background repitive noise off you dumbed down degenerate dickhead

For who don't know, this is an old cup and cone bb..so it needs correct bearings's adjusting with special tools, to prevent hard or loose rotation of axle and pedal

This is very wrong lalo lang lalaki gastos pag nasira instead bumili ng sealed bearing bb na

Which one gives you less friction, BB or sealed?

its not totally fit, there is a clearance it won't last long

nice slide fit 😉 saktong sakto great idea👍

buy cheep cartridge BB

By puting a sealed bb could be better and safier andcheaper..about 12 dollars only

To je cele zle lozisko vnutorny priemer velky pretaca sa na oske vonkajsi priemer maly takze sa pretaca v puzdre ramu bycikla

You mean Downgrade!

So,its been 10 months since you installed this setup,would like to know how been its doing for you,i have two personal vintage bikes to work on following your answer.
Regards
Ravi

Okay ganda naman nyan pwdi ba sa lahat bike yan idol

Thanks for sharing the

Can Bearing 6903 handle 100 kg weight?
Yes or not

Sir pwede Kaya palitan ang cotterless axle bb to hollowtech crank????

Sir pwede Kaya palitan ang cotterless axle bb to hollowtech crank????

IDol libre moko pagandahin mo bike ko HAHHHAHAHHAHAHH

What is the size of the bearing

Can an Isis drive bb be replaced or upgraded to a sealed bearing? Thanks.

Give me bike plssss for school I need it plss give me road bike me it's poor

Gracias por enseñarnos 👍👍👍👍👍👍👍👍

Whats the size of ur bottom bracket and the spindle?

Do all modern bikes now use sealed bearings?

Welcome idea. ❤️❤️❤️

You just added more weight to the BB. That type of BB is already in the 300g range. There is a reason Shimano and Campagnolo use ball bearings with a cup and cone interface in their wheels and the BB would have the same benefits, it just spins better with less friction and therefore would last longer. You just have to properly maintain the bearings which I consider fun because I like to work on my bikes.