Bontrager's Web site and owner's manuals don't provide any information on rim bead width or tire size/pressure ratings so I would be hesitant to put 140psi into a 28mm tire on a Bontrager rim without first checking with Co-Motion or Bontrager to verify max psi for the various tire sizes.

That said, I'd suggest that you could safely go to 115 lbs and then again to 120 psi and see how that works and looks; there should be a slight bulge in the rear tire when you and your stoker put your weight on the tandem. As a rough eye-ball gauge, if there is no tire deflection (bulge) when a team's weight is placed on a tandem, the rear tire is over-inflated. If the rear tire deflects to 1/2 of its unweighted height, it's under-inflated. Front tires tend to be inflated to the same psi as the rear (force of habit?) and also tend to be over-inflated as a result.

Note: If your co-riders are on single bikes with tires inflated to their max psi, chances are they're probably used to seeing tires that have NO sidewall bulges which is actually indicative of an over-inflated tire -- very common with roadies (myself included). Tire pressure is very subjective; we're a 280lb team and I prefer our tires to be over-inflated. We run Vredestein 700x23 & 700x25 tires rated for very high pressure (135-145psi) on narrow rims (Velocity Deep-V) that are well-matched to the narrow, high-pressure tires and have done so for many, many years.

My counsel is to do some experimentation and see what works best for you. If you aren't getting a bunch of pinch flats and the ride quality is to your and your stoker's liking, then you're tire pressure is probably OK. If you find you are getting pinch flats or that the ride is spongy, add 5 lbs of air and see if that corrects it. At the high end, if you get lots of puncture flats or tire cuts (road debris driven into your tires) or find the ride harsh, drop 5lbs of air out of your tires and re-evaluate. You might also try experimenting with a different tire such as a Continental 700x28 Gatorskin just to see how that compares. I find that some tires simply work better for certain teams than others. Again, trial and error.

For more information on tire pressure, be sure to visit this site: http://www.sheldonbrown.com/tires.html#pressure

I'm not a fan of the look either, but the fork itself is well matched for Co-Motion's tandems and a bit more aggressive than their stock steel forks. Moreover, they are very robust, hence the great handling and control. The True Temper fork, while a good fork (I have one on each of our tandems) comes with some limitations: 1) they're not as stiff as the Wound-Up; 2) they're shorter than most tandem forks by nearly 2cm which skews the rake numbers since the head tube angle of a stock tandem not built for that fork ends up being steeper and the front bottom bracket ends up being lower; and 3) the largest size front tire you can use is 25mm. The Reynolds Ouzo Pro while very robust is still only available with a 1.25" steerer and 55mm of rake; perfect for a Santana but not compatible with any other stock tandem as everyone else uses 1.125" headtubes. Bottom Line: You may need to get used to how it looks because the alternatives are functionally not viable or "better".