All Questions
4 questions
4
votes
1
answer
706
views
How can I tell whether any crank is cold forged, hot forged or cast aluminium?
I know that cold forging allows for sleeker designs because cold forged aluminium is stronger. Are there any other giveaways that indicate a certain manufacturing process?
- 733
6
votes
1
answer
656
views
Why have my crank arms started corroding?
I have a set of Rotor 3D cranks and I've just noticed that the non-drive-side crank arm is corroding at the end and around the pedal bore, beneath the surface finish. The drive-side arm is fine.
I ...
- 4,043
1
vote
1
answer
622
views
Restoring Aluminum Cranks
Is it all right to strip and then anodize (at a shop, I suppose?) aluminum cranks?
I'm trying to build a bike and I saw second-hand cranks on eBay. They look like they're fine except for the ...
- 837
16
votes
4
answers
2k
views
Why use multiple materials on chainrings?
Why is it that on a typical mid-level road triple crankset, the outer rings (larger rings) will be aluminum, while the inner ring (small ring) is chro-mo?
It seems to me that if aluminium was good ...
- 538