what is the purpose of these holes?

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brynpoeth
Posts: 7848
Joined: 30 Nov 2013, 11:26am

Re: what is the purpose of these holes?

Postby brynpoeth » 17 Nov 2018, 3:36pm

pwa wrote:Yes, if you go out and buy the cheapest bike you can you are likely to see a flat bit of plate metal with no hole. Putting a hole in there is a way of making that dull feature look just a bit less basic.

Really? It was quite cheap actually
Must spend some time examining rear fork ends on other bikes
Cycling-of course, but it is far better on a Gillott

Brucey
Posts: 31480
Joined: 4 Jan 2012, 6:25pm

Re: what is the purpose of these holes?

Postby Brucey » 17 Nov 2018, 3:54pm

if you do a google image search for 'rohloff dropouts' you will see all kinds of weird and wonderful shapes. Mostly they are for looks rather than function, I feel.

If the dropouts don't have to withstand twisting forces then cutouts are not a bad idea; campag record dropouts are both elegant and well proven

Image

and are made by drop forging.

Actually the material and the method of manufacture are at least as important as the shape; many dropouts are made from inferior materials and these cannot be as minimal as those that are not.

cheers
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Cunobelin
Posts: 8302
Joined: 6 Feb 2007, 7:22pm

Re: what is the purpose of these holes?

Postby Cunobelin » 17 Nov 2018, 8:13pm

Mick F wrote:Well spotted.
We had a thread on here some years ago about Rohloff flanges breaking.


That sounds like a good phrase for those learning English.

"The flange on my Rohloff has broken"