Bottom bracket

[Parrot of Doom]

My left side bearing has gone to the great race in the sky, so I've been looking at options. £44 for a pair of new Shimano cups which isn't bad, but there is another option.

http://www.mountainbikerides.co.uk/fettling/hollow...

6805-2RS (race sealed) bearings. Price = pittance. I'm awaiting a phone call from the bloke at http://www.brammer.co.uk/default.aspx to contact me but I'm guessing the total cost will be no more than about £10.

Just thought I'd pass this along. No need to spend all that money buying new shiny cups and plastic seals when all that wants replacing is a silly cheap industry standard bearing.

Edited by Parrot of Doom on Thursday 2nd April 15:13

Edited by Parrot of Doom on Thursday 2nd April 22:06

[anniesdad]

Let's hope he doesn't read the PH Pedal Powered forum hey! Otherwise the quote might be......£29.99.

Does he do Race Face ones as well?

S

[Parrot of Doom]

You just need to know the size of the bearing really, outer circumference, inner circumference, depth - I think that's it. The Shimano bearing is 25x37x7mm. I can't see any manufacturer making their own bespoke bearings, they'll all be straight from the shelf standard units.

The right side bearing is fine so for now I'm just buying one, the bloke has quoted me £12 which is a damn sight cheaper than £30 for new cups.

[anniesdad]

Parrot of Doom said:

You just need to know the size of the bearing really, outer circumference, inner circumference, depth - I think that's it. The Shimano bearing is 25x37x7mm. I can't see any manufacturer making their own bespoke bearings, they'll all be straight from the shelf standard units.

The right side bearing is fine so for now I'm just buying one, the bloke has quoted me £12 which is a damn sight cheaper than £30 for new cups.

Oh go on, if it's for the Commencal can't you treat her to two?

[Beyond Rational]

Hmm, I'm not sure I would be 100% happy with pressing the bearings in whilst the cups are fitted to the frame.

[Parrot of Doom]

Another option:

http://cgi.ebay.co.uk/6805-2RS-61805-2RS-SEALED-TH...

They're probably not as good quality as the ones that I've bought, but I'm reasonably certain that those ^^^ will only be the same as what is in the cups now.

The reason the bearing failed is because of a poor seal. That's it - there is a plastic outer seal that comes away easily, and the next barrier is the seal for the bearing. Another few pence and an extra gram of weight could have had a couple more seals in there, extending the lifetime - but we wouldn't want that now, would we...

[graeme172]

You just need to know the size of the bearing really, outer circumference, inner circumference, depth - I think that's it. The Shimano bearing is 25x37x7mm. I can't see any manufacturer making their own bespoke bearings, they'll all be straight from the shelf standard units.

The right side bearing is fine so for now I'm just buying one, the bloke has quoted me £12 which is a damn sight cheaper than £30 for new cups.


. thats what i thought till i tried to get a pair of bearings for my (admittidly cheap powerspline) bottom bracket bearing size is 17 31 10.

new cranks in the future maybe.

[Parrot of Doom]

Nice new bearing:



into nice empty cup:



Don't worry I cleaned it out before the new bearing went in, and those marks aren't on a running surface so make no difference (they're from the screwdriver as I was starting the old bearing)

Its all greased up and ready to be put back into the frame. The new bearings are significantly better quality than the old bearings, which aren't even branded.