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Prototype Birmingham WHEELS Expert - titanium

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dinglem:

--- Quote from: griff on August 28, 2015, 06:35 PM --- :daumenhoch: love the drilled out bits
Conjures up images of dads doing 'shed engineering' to help their kids go just a bit quicker

--- End quote ---

I've enjoyed looking through some old pics of lightened and drilled-out Mini builds from BITD - there are some pretty extreme examples and i have found quite a few articles on light weight builds too. Makes you wonder what difference a few holes drilled in a seat post clamp could really make, but i guess it all adds up and a 1% saving on each of the components soon adds up.

I found this shot of a drilled-out Campy chainring which i liked the look of, but the one i have with my set is much smaller and thinner (probably lighter too).


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The backs of the arms had been milled out also.


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Lightened stem (DK i think?)


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Seatpost clamp.


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dinglem:
And here's a full article about a lightweight GT race build.


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oldschoolace:
Cool pics  :daumenhoch:

I think drilling is quite an art form if done properly. Unfortunately alot of what you see compromises structural integrity and isnt straight or symetrical. If its so weak it cant be ridden then its a bit of a joke part  :(

Ive seen stems with a 20mm or so diameter hole drilled right through the top cap and base between the four bolts exposing the knurling on the bars. Looks cool if done well  :daumenhoch:

dinglem:
I know Harbor Lite marketed a lightened stem which was in fact just a DK Mini stem with a hole drilled through the cap as you described above.


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oldschoolace:
So curiousity has got the better of me and ive just been to do a bit of drilling  >:D




Yes i know they are not straight, i just eyeballed it  :-\

Given that the holes are about as large as you dare go the original weighs 48.1g and the drilled 38.4 so around a 20% saving in weight. Could start to add up pretty quick on a complete  :daumenhoch:

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