Current Projects chat and miscellany

non drive side?
thought you're double fixed there.

aluminium nipples or brass? If i'm reading the picture right, it's the non-drive side trailing spokes' nipples of a dished wheel that are suffering? So the 'every 4th' pattern is a combination of non-drive side (so slacker to start with) and goes slacker when skidding. Maybe they become loose enough to damage any protective coatings between the rim and nipples, allowing galvanic corrosion to attack.

what do I do about it? rebuild? I was told the nipples were not anodized alu, but they are black, so steel/brass right?

...History of BBs...

Interesting, and gives me a slightly better idea of what I'm looking at but I've still no idea how to tell what I've got and whether they'll work with the Rotor3d+ crank.

What frame?

And the nice thing about the 3D+ is if you buy the correct BB they'll work with pretty much any frame.

Ah, sorry, just read your post.

A Rotor 3D+ will work fine with both your frames with this bottom bracket:

Which goes into a standard BSA frame.

Just scored this Marin Muirwoods from the tip for £30. Nice and complete with some nice OEM touches. Hasn't had much use, I'm confident that just a change of chain and cables will have this running nicely. Seatpost and stem are free, as are the spoke nipples.

Having rescued it from being scrapped it will now spend a dignified retirement furnished with mudguards, marathon pluses and a child seat. Lovely.

adds 2 bottom brackets to the shopping list and begins to think it might take longer to save for this than previously hoped...

3D+ works with majority of BB systems if that helps in anyway

Yeah, those aren't cheap, around £50 each.

However, you could get two BDOP BSA to BB30 BB's from here: http://www.bdopcycling.com/First-Bottom%20Brackets.asp which would be around a tenner less.

Not a huge help, it is true.

However, you could get two BDOP BSA to BB30 BB's from here: http://www.bdopcycling.com/First-Bottom%20Brackets.asp which would be around a tenner less more.

ftfy, after paying VAT, duty and tax collectors fee.

^^^^^ Score!
So good when serendipity strikes.

^Ennit. I'm buying a Cove XC bike with some seriously nice kit on it from a friend this week. I'm way more excited about the Marin.

what do I do about it? rebuild? I was told the nipples were not anodized alu, but they are black, so steel/brass right?

Rebuild with the corrosion cleaned off, something like lithium grease on the rim holes, and more tension. Or just clean it up, squirt it with oil and hope it stops.

FYI

The white oxide that forms on Aluminium actually protects the metal underneath. It is thin, hard and airtight, just stays as it is once it is formed. Not like rust.

But you have to ask yourself why its happened to just those eyelets. Are they loose and rattling? Or maybe the rim has bulged (about to crack) on those eyelets, which made the paint/anodising crack off, exposing the metal to the air.

853

+

SRAM

Sooooooooooon

strange white secretion from my nipples

sorry to tell you this old boy, but thats milk. I think you're preggers.

853

+

SRAM

Sooooooooooon

What frame?

Stealing Apex from the Ribble or new group?

853

+

SRAM

Sooooooooooon

AWESOME news!
Force 22?

ftfy, after paying VAT, duty and tax collectors fee.

I've never had to pay duty when ordering from them. But them my duty office might be lazier than the UKs.

I had to pay on some hubs, but not on my 110bcd to 144bcd adapter, which cost more.

So, bit of a lottery- I suspect it depends on which courier firm gets the "last mile" gig.

FYI

The white oxide that forms on Aluminium actually protects the metal underneath. It is thin, hard and airtight, just stays as it is once it is formed. Not like rust.

Normally yes, and any freshly exposed aluminium should just re-form its protective layer then stop corroding, but that clearly isn't happening here. My guess is there's a galvanic cell formed there when it's wet and the aluminium is acting as a sacrificial anode to protect the more noble brass nipples and steel spokes.

(The classic example of this is when people try to fix stainless steel sheeting with aluminium pot-rivets - when exposed to weather the large area of less electronegative steel makes the small rivets rapidly corrode away. But in your case the small area of nipples and spoke versus the large area of rim should be working in your favour, only the rim's protective anodisation is too good - it's focused the corrosion to just where the nipples have damaged it.)

Just took a link out. Is this going to kill me riding street?
Excuse shitty iPhone pics

Front, for reference

kthanx

dont remove any more because the front will start to rub.

What frame?

Stealing Apex from the Ribble or new group?

AWESOME news!
Force 22?

i got the brompton which means im gonna have to take everything from the old road bike and put it on the new one.