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Sparky
Joined: 08 Dec 2003
Posts: 19080
Location: PDX8/13/18 6:28 PM |
Is a 44mm DT on frame going to kill?
Custom GURU Ti frame I have in my reach. I am kind of concerned with a 44mm round DT it may be so brutally stiff, even being Titanium, I might rue the purchase.
Opinions?
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dfcas
Joined: 11 Jan 2004
Posts: 2815
Location: hillbilly heaven8/13/18 8:43 PM |
My custom Carver has a Butted 44mm downtube. Not too harsh, but I have no idea if I would have liked a smaller tube better.
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Sparky
Joined: 08 Dec 2003
Posts: 19080
Location: PDX8/13/18 8:55 PM |
And you are a 59-60 as I recall.
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dfcas
Joined: 11 Jan 2004
Posts: 2815
Location: hillbilly heaven8/13/18 9:02 PM |
Carver suggested it was appropriate for a big frame and somewhat heavy rider.
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greglepore
Joined: 10 Jan 2004
Posts: 1724
Location: SE Pa, USA8/14/18 6:52 AM |
No. I have one on a custom ti in a sloping bike set up for a 5'5 rider. Its not "harsh" but its definitely not as buttery as conventional ti. On my build the seatstays make up for it. I'd try the guru if it fits.
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LeeW
Joined: 13 Jan 2004
Posts: 453
Location: near Baltimore, MD8/14/18 7:12 AM |
I once had a '99 Litespeed Ultimate that had the thick, roughly-airfoil shaped downtube (that was made out of sheet titanium bent around a form and welded at the bottom. It did not ride overly stiff.
Give it a try if you're interested.
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Sparky
Joined: 08 Dec 2003
Posts: 19080
Location: PDX8/14/18 2:16 PM |
I honestly thought I'd be asking "you calling me fat?" by now in this thread. ;)
It sold before they answered any questions. Not the first time The Pro's Closet questions went unanswered either. Maybe better not to deal with them, if they don't service ahead of a purchase, I doubt after will be better...
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Nick Payne
Joined: 10 Jan 2004
Posts: 2626
Location: Canberra, Australia8/14/18 4:03 PM |
My Lynskey Sportive in XL size has a 45mm DT, and it's not harsh to ride (I use Schwalbe S-One 30mm tubeless tyres on it). I also have a Lynskey GR Pro which has the blunt-nosed triangular DT formed from 6-4 Ti sheet, but with 48-50mm tyres at 25-35psi on that bike, frame rigidity doesn't really come into the comfort equation.
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Sparky
Joined: 08 Dec 2003
Posts: 19080
Location: PDX8/14/18 6:13 PM |
Nick, is the sportive disc or rim brakes? If rim, does it need 57mm mid reach calipers?
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Nick Payne
Joined: 10 Jan 2004
Posts: 2626
Location: Canberra, Australia8/14/18 10:36 PM |
The Sportive I have is the rim brake version, and uses short reach calipers (SRAM Force). I doubt that a 30mm tyre would fit in the front with a carbon fork - I'm using a steel fork which has the hole for mounting the brake bolt closer to the bottom of the fork crown than does a carbon fork.
I forget exactly how old my frame is - I bought it about four years ago, I think - the model I bought was the last one where they made the frame with straight headtube for 1-1/8" steerer fork. All the more recent models have tapered headtube for tapered steerer.
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