I’m building myself a frame this week. It’s a carbon road frame with integrated seat post, press in BB30 and InSet. All things I won’t do on a metal frame.
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Which begs an obvious question ………….. ????????????
BTW – that cabinet in the far corner is a nice looking piece of furniture.
The reason I don’t put BB30, InSet or Integrated posts on metal bikes?
Mainly because they add weight. The BB30 and InSet are born of the carbon frame. They allow manufacturers to build to the standard without metal inserts and reduce frame weight.
It’s my understanding (and my scale agrees with me) that a BB30 crank such as the Cannondale Hollowgram SI + bb30 bottom bracket is lighter than a DuraAce-7900 + standard bb. Am I mistaken somehow?
As for the InSet, is there really a significant weight difference? It can’t possibly be more than 50 grams heavier than a standard headset
–dominic (the guy who had Carl build a Ti frame w/bb30 and an InSet headset)
Hi Dominic, you’re the only one. As far as the weight is concerned I’m referring to the frame. The BB shell and HT are heavier than the standard BB shell and HT.
do you feel there is anything to be gained on a metal bike as far as stiffness is concerned for the frame from a BB30. Would it enable you to use a larger diameter thinner wall tube because there is more surface area to work with around the BB?
Good to see you excited about your own product. That’s the framebuilder you want making your bike!!
@carl: Oh yeah, gee silly me to forget about the extra metal for the BB and head tube. Duh!
@mark: I’m *very* happy with the stiffness on my Ti frame with the BB30. It has a monster downtube (1.5 inch) and when I jump out of the saddle, I get the response I want. Now could a frame be built with equivalent stiffness without a BB30? Probably… Carl could say for sure.
Hi Mark, the claim is that you can use a thin wall tube for the Press in 30 shell on metal but I’m not comfortable with that. Maybe after some testing I’ll find that it will work just fine but I wouldn’t put it on a customer bike until I knew it was going to work. As for stiffness I’m not sure a perceptible gain in stiffness would occur but if you were able to use a thin wall tube for the BB shell there would be a small weight savings.
thanks for the response guys. I was thinking more about the gauges/diameters of the chainstay and seatstays rather than the BB itself.
Oh, I get it. Yes, I suppose it would but I’m not sure I’d want to make a bike much stiffer than the stiffer bikes I make right now. You get to a point of diminishing returns and ultimately run into handling problems because the wheels skips.
That thing looks pretty sexy, Mr. Strong!
Do you have a cool Paint Scheme in mind?
Yep, I think I’m going to go with Metallic White leaving the “Strong” on the DT carbon weave with a metallic read outline. I want to keep it simple. I’ll be building it up with Sram Red and white DT 1450 wheels. The DO’s will also be Red anodized, as they are pictured now they have temps in for fixturing.
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