MCFK 5 grams with Extralite bolt machined down further

[SebK]

MCFK (Germany) Custom seatclamp modified by me incl Extralite heavily machined bolt and shortened in the lathe . 5grams. 

[FreaK]

You glorious son of a gun!

[SebK]

Errr... cool !!!

[prendrefeu]

Super impressed with your work.

[Nelus]

Nice work.

[SebK]

Thnks guys !!! Starting to feel a little better about this site .

[jamesbass]

Do you think it's possible to drill down a standard "heavy" clamp to something resembling this?

Mine's 30g for example. I'll probably never get it under 10g but what are your thoughts? 15g Possible? Any tips?

[SebK]

You could drill through the centre with a carbide drill bit slowly and work your way (gently ) to about 2.5mm to the edge of the clamp using a cutting tool (rotary tool) to create a large slot to reduce weight .You have to be careful with alloy as it can crack easy if too much pressure/stress is put on it . Then just smooth the slot with either a narrow sanding drum or 300-600 grit paper . Remember not to leave any stress risers . All edges have to be rounded and not lines should be on the metal where you have cut . You should easily drop the weight to around 15grams (depending on the thickness of the alloy) .

[Tomstr]

That is some hardcore tuning!

[UpFromOne]

love the shaved bolt, never really considered doing that before but then this is low torque...

[dereksmalls]

Very nice work. Have you checked out the Show Us Your Tuning thread? Lot's of good stuff in there

[djconnel]

Nice! But I burned through 2 ultralight Al seatpost clamps before going back to the still-light one which shipped with my Fuji SL/2 which was maybe 5 grams heavier. The security was worth it.

[Jmdesignz2]

Nice! But I burned through 2 ultralight Al seatpost clamps before going back to the still-light one which shipped with my Fuji SL/2 which was maybe 5 grams heavier. The security was worth it.

Please tell us which ones to avoid?

[SebK]

Oh those thin walled aluminium ones are rubbish . I have never owned one simply because just by looking at them you can tell the narrowness of the aluminium will break over time . They should be a little thicker at the front (where most stress is put on the seatclamp) . No these carbon ones are very strong .

[DanW]

My 6g/ £20 Mt Zoom clamp has been going strong for 2 years MTB riding/ racing. Nice tuning though. At 3-4Nm you could probably even get away with an Alu bolt- I didn't have any issues with that on other clamps in the past