umop3pisdn-
To an extent, yes it will. Obviously an extra link in the chain will give ~12mm more clearance, but it may be that one less link results in negative clearance and one more link results in a huuuuge gap, which leaves only one choice. We'll see - my @mdcc_tester approved 1Z1 was delivered today, so I can see what clearance I end up with. Next question is whether to stick with 50x16 or gear up to 50x15 for this winter's track training.
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Won't the rear wheel's position depend on the gear you're running?
If you're a proper aero-weenie, you find the optimal wheel position then magic gear to get the ratio you want with the wheel position you need.
1R8 is the Tester recommended racing chain, 1Z1 is for training
1Z1 will be fine for track racing, the 1R8 is just more tarty but less corrosion resistant and more expensive. Because the 1R8 is a lot stiffer, I'd expect it to be a bit more efficient at high chain tension because the roller should land on the tooth more precisely, but we're talking very small fractions of the total power loss, and that total is only about 1.5% of input power for a clean and properly lubricated chain at typical cycling power and drivetrain configuration.
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Brommers
gbj_tester
Cheers chaps. If there's no obviously right answer (and hence no obviously wrong answer) then I'll just put it wherever I think it looks best. I'll probably try to match the gap between the front wheel and the cut-out in the frame.