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Old 04-02-14, 11:59 AM   #1
JohnnyCyclist
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Sigma ROX 8.0/8.1/9.0/9.1 components compatible?

I own a ROX 8.0 I purchased years ago. Since I use it on two bikes, I purchased a 2nd bike kit and swap the head unit between the two bikes.

I just bought a new bike and am debating whether I should purchase a whole new kit, or just another 2nd bike kit (I'd then have two different bikes recording data as the 2nd bike, but I don't care).

If the HR transmitter, Speed transmitter, Cadence transmitter, and head unit receiver are all compatible with each other, then I will purchase a complete package (most likely an 8.1, though if I can find a 9.x cheap I'll go for it). The chest strap from my 8.0 is getting kind of ratty, and one of the buttons on my 8.0 sometimes doesn't work. By purchasing a whole new package I'd get a new HR strap as well as a new head unit for the day that my old ones inevitably die.

If they're incompatible, then my choice is to either purchase another 8.0 2nd bike kit and hope the head unit/chest strap last a while, or purchase an incompatible-with-my-other-two-bikes computer (any brand) entirely.

Does anyone know if the 8.0, 8.1, 9.0, and 9.1 "speak the same language"? Thanks.

Last edited by JohnnyCyclist; 04-02-14 at 01:10 PM. Reason: clarity
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