This isn’t a tri bike but if you’re looking for one of the best riding and well known road frames, go no further 
Colnago C40 B-Stay HP frameset and Star Fork, New old stock. Was to be a new project bike but I have changed my mind.
This is Colnago’s 55cm C40 model - non sloping.
Frame Measurements:
Top Tube: 54.3cm Center to Center
Seat Tube: 56.5cm Center to top of Seat Clamp
Head Tube: 13cm
Specifications:
1" Star Carbon Fork, Uncut
Requires 28mm Seatpost (Colnago or Thomson Masterpiece will work)
Italian BB thread
700c wheels
Sale includes:
Frame, Fork, Colnago steerer compression device, seatclamp and bolt, cable barrel adjusters, front and rear brake mounting nuts, bottom bracket cable guide with Ti bolt
Headtube has been prep’d for headset installation. Clear chainstay protector has been installed, saving the new owner a little hassle.
Paint is perfect except for one tiny 2mm wide factory paint flaw (under the clear coat) on one of the stays. Wheels were lightly clamped into the frame / fork for display purposes at one point in time - you can see the very light QR impressions in the dropouts. With those minor points noted, this frame is new.
Asking price is $1900. Shipping is additional and to the Continental USA only. Paypal payment preferred.
PM for details.
Factory paint flaw